96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

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

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Air Conditioning is a completely different system than propulsion systems.
There ought to be no relationship between smoke and the AC system. Except
that the AC system can contribute to overheating while stopped and/or under
heavy loads. The reason for this is that the AC system will warm the air
going through the cooling system radiatror, causing it to be reduced in its
effectiveness. It isn't so much that the AC will warm the air is that it
blocks the air.




"Rick" <rick.skowyra@ryersontull.com> wrote in message
news:30cd958b.0406211122.2782c927@posting.google.c om...
> 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

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Air Conditioning is a completely different system than propulsion systems.
There ought to be no relationship between smoke and the AC system. Except
that the AC system can contribute to overheating while stopped and/or under
heavy loads. The reason for this is that the AC system will warm the air
going through the cooling system radiatror, causing it to be reduced in its
effectiveness. It isn't so much that the AC will warm the air is that it
blocks the air.




"Rick" <rick.skowyra@ryersontull.com> wrote in message
news:30cd958b.0406211122.2782c927@posting.google.c om...
> 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

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Air Conditioning is a completely different system than propulsion systems.
There ought to be no relationship between smoke and the AC system. Except
that the AC system can contribute to overheating while stopped and/or under
heavy loads. The reason for this is that the AC system will warm the air
going through the cooling system radiatror, causing it to be reduced in its
effectiveness. It isn't so much that the AC will warm the air is that it
blocks the air.




"Rick" <rick.skowyra@ryersontull.com> wrote in message
news:30cd958b.0406211122.2782c927@posting.google.c om...
> 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

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Rick did pass the time by typing:
> 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 ??

Yes and your probably not going to like it.

Heading off water contamination in the fuel tank... Filled up
at a cheap station or a low (elevation) station after a heavy rain?
You may have a tank of crapoline. A gas drier that's safe for O2
sensors can help that.

However......

You may also be describing a leaking head gasket. Check the oil
for coolant and the coolant for oil. White smoke is usually water
being sucked into the engine and blue, oil. It is a very bad thing to
continue running with a leaking head gasket as it will destroy your
engine in short course.

--
DougW

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Rick did pass the time by typing:
> 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 ??

Yes and your probably not going to like it.

Heading off water contamination in the fuel tank... Filled up
at a cheap station or a low (elevation) station after a heavy rain?
You may have a tank of crapoline. A gas drier that's safe for O2
sensors can help that.

However......

You may also be describing a leaking head gasket. Check the oil
for coolant and the coolant for oil. White smoke is usually water
being sucked into the engine and blue, oil. It is a very bad thing to
continue running with a leaking head gasket as it will destroy your
engine in short course.

--
DougW

Re: 96 jeep grand cherokee intermittant exhaust smoke when air conditioner on
 

Rick did pass the time by typing:
> 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 ??

Yes and your probably not going to like it.

Heading off water contamination in the fuel tank... Filled up
at a cheap station or a low (elevation) station after a heavy rain?
You may have a tank of crapoline. A gas drier that's safe for O2
sensors can help that.

However......

You may also be describing a leaking head gasket. Check the oil
for coolant and the coolant for oil. White smoke is usually water
being sucked into the engine and blue, oil. It is a very bad thing to
continue running with a leaking head gasket as it will destroy your
engine in short course.

--
DougW

Re: 96 jeep grand cherokee intermittant exhaust smoke when airconditioner on
 

Hi Rick,
The air conditioning will have nothing to do with smoke out the
exhaust.
Have your valve cover gasket replaced and you'll cure that junk
yard smell.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Rick wrote:
>
> 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

Re: 96 jeep grand cherokee intermittant exhaust smoke when airconditioner on
 

Hi Rick,
The air conditioning will have nothing to do with smoke out the
exhaust.
Have your valve cover gasket replaced and you'll cure that junk
yard smell.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Rick wrote:
>
> 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

Re: 96 jeep grand cherokee intermittant exhaust smoke when airconditioner on
 

Hi Rick,
The air conditioning will have nothing to do with smoke out the
exhaust.
Have your valve cover gasket replaced and you'll cure that junk
yard smell.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Rick wrote:
>
> 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