96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
07-06-2004, 03:15 PM
#31
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
"DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
07-06-2004, 03:15 PM
#32
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
"DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
07-06-2004, 03:15 PM
#33
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
"DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
07-06-2004, 03:15 PM
#34
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
"DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
> Lon did pass the time by typing:
> > Rick proclaimed:
>
> >> More info!
> >> I didn't know this before.
> >> My father added some stop leak stuff to the oil last week!
> >> He didn't tell me.
> >> Could that cause intermittant smoke from the exhaust??
> >
> > Stop leak in the oil *might* cause it but only if you have an
> > internal oil leak in the engine itself..which would be not good news.
> >
> > If you can see the smoke by running the thing up to goodly speed,
> > then let off the gas.... then as the thing slows 15-20 miles per
> > hour, gently press the gas again. Smoke then is usually stuff like
> > valve seals, altho it could be piston rings or such. Dunno how
> > easy it is to get oil thru a blown head gasket on the 4.0.
> >
> > Would think that even with a catalyst you might be able to feel
> > an oilish material on the inside of the exhaust...AFTER it has
> > been gotten good and hot, then allowed to cool down. If so, the
> > oil isn't doing your catalysts much good either.
>
> Easy enough just to pull the plugs and check. Take note of each plug
> (or take a photo and give us a link).
>
> The only blown headgaskets in the 4.0 that I've seen sucked coolant or
> let the coolant get into the oil. Burning oil has almost always been
> worn valve guides. Never looked at the passages that closely. Feed comes
> up through the lifter rods and returns through the drain holes, there
> isn't enough pressure there to force oil into the engine.
>
> Now on more than one occasion I've had a HUGE white cloud follow me.
> Almost thought I blew the engine. Turns out it was a tank of crapoline.
> Pumped out a cup by cycling the fuel pump and it was almost 10% water.
> Only tank I ever dumped.
>
> p.s. If your going to do this, dump the gas into a large plastic or glass
> container and let the water sink to the bottom. Pour the "good" fuel off
> into a gas can and repeat. Take a while but slowly it removes the water.
> Then go with a fuel system drier.
MORE INFO!
Ok,
I wasn't getting any smoke for a while, and I haven't used the air
conditioner at all. Well, this weekend I took a trip, and used the
air.
You guessed it! Smoke emitting. I pulled over and looked under the
car.
There was smoke coming from the cat converter. It was also dripping.
However, I couldn't tell if the dripping it oil or dirty water.
I let it cool down for about a half hour, and continued on.
I didn't turn on the air again.
No smoke
I also didn't turn the air on at all in the 2 hour ride the next day.
No smoke.
I do have a small oil leak, and it's been there for quite a while.
I get a small puddle wherever I park.
Can this possibly the the water from the air conditioner building up
and getting into the catalytic converter ??
Rick
07-06-2004, 05:04 PM
#35
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioneron
Rick wrote:
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
07-06-2004, 05:04 PM
#36
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioneron
Rick wrote:
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
07-06-2004, 05:04 PM
#37
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioneron
Rick wrote:
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
07-06-2004, 05:04 PM
#38
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioneron
Rick wrote:
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
> "DougW" <post.replies@invalid.address> wrote in message news:<Tn6Cc.77979$%T.42434@okepread05>...
>
>>Lon did pass the time by typing:
>>
>>>Rick proclaimed:
>>
>>
>>
>>>>More info!
>>>>I didn't know this before.
>>>>My father added some stop leak stuff to the oil last week!
>>>>He didn't tell me.
>>>>Could that cause intermittant smoke from the exhaust??
>>>
>>> Stop leak in the oil *might* cause it but only if you have an
>>> internal oil leak in the engine itself..which would be not good news.
>>>
>>> If you can see the smoke by running the thing up to goodly speed,
>>> then let off the gas.... then as the thing slows 15-20 miles per
>>> hour, gently press the gas again. Smoke then is usually stuff like
>>> valve seals, altho it could be piston rings or such. Dunno how
>>> easy it is to get oil thru a blown head gasket on the 4.0.
>>>
>>> Would think that even with a catalyst you might be able to feel
>>> an oilish material on the inside of the exhaust...AFTER it has
>>> been gotten good and hot, then allowed to cool down. If so, the
>>> oil isn't doing your catalysts much good either.
>>
>>Easy enough just to pull the plugs and check. Take note of each plug
>>(or take a photo and give us a link).
>>
>>The only blown headgaskets in the 4.0 that I've seen sucked coolant or
>>let the coolant get into the oil. Burning oil has almost always been
>>worn valve guides. Never looked at the passages that closely. Feed comes
>>up through the lifter rods and returns through the drain holes, there
>>isn't enough pressure there to force oil into the engine.
>>
>>Now on more than one occasion I've had a HUGE white cloud follow me.
>>Almost thought I blew the engine. Turns out it was a tank of crapoline.
>>Pumped out a cup by cycling the fuel pump and it was almost 10% water.
>>Only tank I ever dumped.
>>
>>p.s. If your going to do this, dump the gas into a large plastic or glass
>>container and let the water sink to the bottom. Pour the "good" fuel off
>>into a gas can and repeat. Take a while but slowly it removes the water.
>>Then go with a fuel system drier.
>
>
>
> MORE INFO!
>
> Ok,
> I wasn't getting any smoke for a while, and I haven't used the air
> conditioner at all. Well, this weekend I took a trip, and used the
> air.
> You guessed it! Smoke emitting. I pulled over and looked under the
> car.
> There was smoke coming from the cat converter. It was also dripping.
> However, I couldn't tell if the dripping it oil or dirty water.
>
> I let it cool down for about a half hour, and continued on.
> I didn't turn on the air again.
> No smoke
>
> I also didn't turn the air on at all in the 2 hour ride the next day.
> No smoke.
>
> I do have a small oil leak, and it's been there for quite a while.
> I get a small puddle wherever I park.
>
> Can this possibly the the water from the air conditioner building up
> and getting into the catalytic converter ??
>
> Rick
How about the oil, from your existing leak, being washed down onto the
cat by the AC condensation??????
In this theory, with no water dripping out of the AC, the oil either
clings or drips straight down. Stranger things have happened.
Just a thought.
Regards,
DAve
--
Fan of the Late, Great Southern Pacific and the Small Old Santa Fe
07-07-2004, 03:42 AM
#39
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
Well, I'm not nearly as mechanically inclined as some here, and I'll
probably get crucified for this, but here it goes:
You mentioned an oil leak and burn... does the smoke occur after you
"top off" the oil? (we've all probably had one of those "check the
gas and fill the oil" cars at one point in our lives). Do you top it
up or wait until the dipstick registers a full quart low, then add a
full quart? In my experience, even new vehicles have a "happy point"
with oil level that may or may not read completely full on the
dipstick even though there is no leaking or burning... As Bill said,
the valve cover gasket could be the source of the smell but the smoke
could be a result of overfilling and due to the fact that you've got
so many miles, could be some tired rings and high pressure.
I was always taught to never add oil until you're a full quart low.
Too much will spell disaster for engines with high mileage.
Just a thought. Good luck!
John
rick.skowyra@ryersontull.com (Rick) wrote in message news:<30cd958b.0406211122.2782c927@posting.google. com>...
> Maybe some of you have an idea what this is ?
>
> My 96 Grand Cherokee has 180K miles on it.
> Recently (on 2 occasions) while on the highway, I noticed a decent
> amount of smoke in my rear view mirror. I had the AC on. The first
> time, it just stopped on it's own. The second time, the smoke
> disappeared after I shut off the air conditioning. I can't tell if
> the smoke is just white in color or if there is a little blue in
> there. The engine has a lot of miles on it and it has a moderate oil
> leak. It's also burning some oil (I can tell by the smell when I get
> out of the car). However, this new problem seems to be tied in with
> the air conditioner. The AC still works well inside the car.
>
> BY the way, no loss of coolant, and the oil looks ok on the dipstick.
> Also, I never got an indication of over-heating.
>
> Any ideas ??
>
> Rick
probably get crucified for this, but here it goes:
You mentioned an oil leak and burn... does the smoke occur after you
"top off" the oil? (we've all probably had one of those "check the
gas and fill the oil" cars at one point in our lives). Do you top it
up or wait until the dipstick registers a full quart low, then add a
full quart? In my experience, even new vehicles have a "happy point"
with oil level that may or may not read completely full on the
dipstick even though there is no leaking or burning... As Bill said,
the valve cover gasket could be the source of the smell but the smoke
could be a result of overfilling and due to the fact that you've got
so many miles, could be some tired rings and high pressure.
I was always taught to never add oil until you're a full quart low.
Too much will spell disaster for engines with high mileage.
Just a thought. Good luck!
John
rick.skowyra@ryersontull.com (Rick) wrote in message news:<30cd958b.0406211122.2782c927@posting.google. com>...
> Maybe some of you have an idea what this is ?
>
> My 96 Grand Cherokee has 180K miles on it.
> Recently (on 2 occasions) while on the highway, I noticed a decent
> amount of smoke in my rear view mirror. I had the AC on. The first
> time, it just stopped on it's own. The second time, the smoke
> disappeared after I shut off the air conditioning. I can't tell if
> the smoke is just white in color or if there is a little blue in
> there. The engine has a lot of miles on it and it has a moderate oil
> leak. It's also burning some oil (I can tell by the smell when I get
> out of the car). However, this new problem seems to be tied in with
> the air conditioner. The AC still works well inside the car.
>
> BY the way, no loss of coolant, and the oil looks ok on the dipstick.
> Also, I never got an indication of over-heating.
>
> Any ideas ??
>
> Rick
07-07-2004, 03:42 AM
#40
Guest
Posts: n/a
Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
Well, I'm not nearly as mechanically inclined as some here, and I'll
probably get crucified for this, but here it goes:
You mentioned an oil leak and burn... does the smoke occur after you
"top off" the oil? (we've all probably had one of those "check the
gas and fill the oil" cars at one point in our lives). Do you top it
up or wait until the dipstick registers a full quart low, then add a
full quart? In my experience, even new vehicles have a "happy point"
with oil level that may or may not read completely full on the
dipstick even though there is no leaking or burning... As Bill said,
the valve cover gasket could be the source of the smell but the smoke
could be a result of overfilling and due to the fact that you've got
so many miles, could be some tired rings and high pressure.
I was always taught to never add oil until you're a full quart low.
Too much will spell disaster for engines with high mileage.
Just a thought. Good luck!
John
rick.skowyra@ryersontull.com (Rick) wrote in message news:<30cd958b.0406211122.2782c927@posting.google. com>...
> Maybe some of you have an idea what this is ?
>
> My 96 Grand Cherokee has 180K miles on it.
> Recently (on 2 occasions) while on the highway, I noticed a decent
> amount of smoke in my rear view mirror. I had the AC on. The first
> time, it just stopped on it's own. The second time, the smoke
> disappeared after I shut off the air conditioning. I can't tell if
> the smoke is just white in color or if there is a little blue in
> there. The engine has a lot of miles on it and it has a moderate oil
> leak. It's also burning some oil (I can tell by the smell when I get
> out of the car). However, this new problem seems to be tied in with
> the air conditioner. The AC still works well inside the car.
>
> BY the way, no loss of coolant, and the oil looks ok on the dipstick.
> Also, I never got an indication of over-heating.
>
> Any ideas ??
>
> Rick
probably get crucified for this, but here it goes:
You mentioned an oil leak and burn... does the smoke occur after you
"top off" the oil? (we've all probably had one of those "check the
gas and fill the oil" cars at one point in our lives). Do you top it
up or wait until the dipstick registers a full quart low, then add a
full quart? In my experience, even new vehicles have a "happy point"
with oil level that may or may not read completely full on the
dipstick even though there is no leaking or burning... As Bill said,
the valve cover gasket could be the source of the smell but the smoke
could be a result of overfilling and due to the fact that you've got
so many miles, could be some tired rings and high pressure.
I was always taught to never add oil until you're a full quart low.
Too much will spell disaster for engines with high mileage.
Just a thought. Good luck!
John
rick.skowyra@ryersontull.com (Rick) wrote in message news:<30cd958b.0406211122.2782c927@posting.google. com>...
> Maybe some of you have an idea what this is ?
>
> My 96 Grand Cherokee has 180K miles on it.
> Recently (on 2 occasions) while on the highway, I noticed a decent
> amount of smoke in my rear view mirror. I had the AC on. The first
> time, it just stopped on it's own. The second time, the smoke
> disappeared after I shut off the air conditioning. I can't tell if
> the smoke is just white in color or if there is a little blue in
> there. The engine has a lot of miles on it and it has a moderate oil
> leak. It's also burning some oil (I can tell by the smell when I get
> out of the car). However, this new problem seems to be tied in with
> the air conditioner. The AC still works well inside the car.
>
> BY the way, no loss of coolant, and the oil looks ok on the dipstick.
> Also, I never got an indication of over-heating.
>
> Any ideas ??
>
> Rick
