I've got an intermittent, minor coolant leak on the driver's side of
the 4.0L. She's got about 118K on her. Every so often, I'll find a
tiny puddle (silver dollar size) of coolant under her on this side.

I cannot find any hose that is the culprit. I know there are some
freeze plugs over here, but visually they look ok, near as I can see
(not a lot of room to get in there). I'm using the difference between
"full" and "add" in the coolant bottle over the course of a week.
Before you ask, no white smoke out the back, so I don't think I'm
burning it, and dipstick looks like pure oil.

Aux. fan is running when AC kicks up, so no boil over. Replaced all
hoses, water pump and thermostat about 6 months ago when the water pump
went.

It has me stumped. Any ideas?

Thanks much.

S.

 

You should see a little corrosion wherever the coolant is leaking from.
Trying taking it for a short drive and getting the engine good and hot - run
the AC, and take it home. Make sure it's hot, and open the hood and look for
a leak try having someone rev the engine while you look, and also try
shutting off the engine and re-checking.

Failing that, you can get a cooling system pressure tester for around $20 at
an auto parts store. Basically, it hooks up where your radiator cap goes and
pressurises the system. It's got a little gauge. If it's got a leak, it'll
leak when you pump it up.


HTH

Carl


<fraserwag@yahoo.com> wrote in message
news:1157681864.553685.248710@d34g2000cwd.googlegr oups.com...
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.
>

 

You should see a little corrosion wherever the coolant is leaking from.
Trying taking it for a short drive and getting the engine good and hot - run
the AC, and take it home. Make sure it's hot, and open the hood and look for
a leak try having someone rev the engine while you look, and also try
shutting off the engine and re-checking.

Failing that, you can get a cooling system pressure tester for around $20 at
an auto parts store. Basically, it hooks up where your radiator cap goes and
pressurises the system. It's got a little gauge. If it's got a leak, it'll
leak when you pump it up.


HTH

Carl


<fraserwag@yahoo.com> wrote in message
news:1157681864.553685.248710@d34g2000cwd.googlegr oups.com...
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.
>

 

You should see a little corrosion wherever the coolant is leaking from.
Trying taking it for a short drive and getting the engine good and hot - run
the AC, and take it home. Make sure it's hot, and open the hood and look for
a leak try having someone rev the engine while you look, and also try
shutting off the engine and re-checking.

Failing that, you can get a cooling system pressure tester for around $20 at
an auto parts store. Basically, it hooks up where your radiator cap goes and
pressurises the system. It's got a little gauge. If it's got a leak, it'll
leak when you pump it up.


HTH

Carl


<fraserwag@yahoo.com> wrote in message
news:1157681864.553685.248710@d34g2000cwd.googlegr oups.com...
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.
>

 

It's not the normal condensed water/ice melting off your Air
Conditioner's evaporator, is it, passenger side firewall, while parked?
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

fraserwag@yahoo.com wrote:
>
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.

 

It's not the normal condensed water/ice melting off your Air
Conditioner's evaporator, is it, passenger side firewall, while parked?
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

fraserwag@yahoo.com wrote:
>
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.

 

It's not the normal condensed water/ice melting off your Air
Conditioner's evaporator, is it, passenger side firewall, while parked?
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

fraserwag@yahoo.com wrote:
>
> I've got an intermittent, minor coolant leak on the driver's side of
> the 4.0L. She's got about 118K on her. Every so often, I'll find a
> tiny puddle (silver dollar size) of coolant under her on this side.
>
> I cannot find any hose that is the culprit. I know there are some
> freeze plugs over here, but visually they look ok, near as I can see
> (not a lot of room to get in there). I'm using the difference between
> "full" and "add" in the coolant bottle over the course of a week.
> Before you ask, no white smoke out the back, so I don't think I'm
> burning it, and dipstick looks like pure oil.
>
> Aux. fan is running when AC kicks up, so no boil over. Replaced all
> hoses, water pump and thermostat about 6 months ago when the water pump
> went.
>
> It has me stumped. Any ideas?
>
> Thanks much.
>
> S.

 

my 96 jeep just went through the same thing and I had a clogged radiator
but yours doesn't sound that bad. Does it only leak when its cold or sat
for a while? It might just be a clamp thats not tightened well and it only
leaks every so often when the car is cool.

 

my 96 jeep just went through the same thing and I had a clogged radiator
but yours doesn't sound that bad. Does it only leak when its cold or sat
for a while? It might just be a clamp thats not tightened well and it only
leaks every so often when the car is cool.

 

my 96 jeep just went through the same thing and I had a clogged radiator
but yours doesn't sound that bad. Does it only leak when its cold or sat
for a while? It might just be a clamp thats not tightened well and it only
leaks every so often when the car is cool.