coolant leak... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-31-2006, 09:10 PM   #1
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Default coolant leak...

Hello everybody,
I know it'* been a while but things happened beyond my control.

The problem..

95 SSE w/132.XXX

The engine leaks coolant from somewhere on the passenger side.
I've checked the water pump/weep hole...no wetness
I've checked the plastic coolant elbow...no leekes or wetness
I've checked the timing cover...no leek there either
Also the hoses and radiator are clean...no leeks

I do see however wetness behind the black upper intake; wiped it with clean white towel and it smells like burnt coolant...

The car does not leak all the time only when its wants too; I notice it when its parked for 8 hours or so. also does this on flat and incline parking lots.

My wife drives the car for 2 minutes to work, sits for 4 to 5 hours and 2 min back.

Thanks again for your timely help with this matter

-toddster
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Old 10-31-2006, 09:22 PM   #2
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Any signs of it being an internal leak? How'* your oil? That'* the first thing I think of with an L36.

You don't see any coolant anywhere besides near the upper intake?
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Old 10-31-2006, 09:26 PM   #3
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The oil is fine, also the only area I can see that it is leaking is between the UIM and the injectors.?
thanks

-todster
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Old 11-01-2006, 12:48 AM   #4
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On an unrelated point: Two minute trips are not long enough to get the engine up to operating temperature, about 180*F. It needs to get warm enough to burn of moisture in the oil and to prevent carbon build up in the lower intake manifold and combustion chambers. You also run the risk of forming sludge in the oil.
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Old 11-01-2006, 03:41 AM   #5
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Quote:
Originally Posted by MACDRIVE
On an unrelated point: Two minute trips are not long enough to get the engine up to operating temperature, about 180*F. It needs to get warm enough to burn of moisture in the oil and to prevent carbon build up in the lower intake manifold and combustion chambers. You also run the risk of forming sludge in the oil.
yeah i agree there, I hope its being driven more than only 2 minutes at a time, take it out for a half hour drive or so and get it nice and warm and burn off anything that might be starting to build up in the engine. Hah, maybe run some seafoam through it if those 2 minute trips have been happening for a while.

on topic...what is the date on the UIM? Has it been changed on that car before? Really would be sad if that engine got killed over that. And are you POSITIVE the oil is ok? because to the best of my knowlege you can't always tell with just the dipstick...but I could be wrong.

Good luck Todd!
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Old 11-01-2006, 11:03 AM   #6
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Toddster

Clean it down.. I'd venture that it'* a leaking LIM gasket and the coolant is coming up the bolt to the intake.
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Old 11-02-2006, 01:55 PM   #7
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Thanks for all your help guys.
Replacing LIM gasket, UIM manifold and gasket, coolant elbow this weekend.
car should be fine. fill you in when it'* done.
thanks again for all your help
-toddster
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Old 11-02-2006, 01:57 PM   #8
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Todd... ensure your torque specs are correct. The FSM'* had them in the reverse order. Metal LIM gets more torque than the plastic UIM.
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