Question about 1997 Buick LeSabre

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Coolant in the cylinders

I just changed the plenium gasket on my 1997 buick lesabre with the 3.8 liter. and now i have coolant in all of the cylinders . i have heard that gm's are know for the upper intake (plenium) problems but i am really stumped on what to do can you help me out???????

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Hi! It could be that the gasket was not placed or torque properly.Why did u changed the gasket?

Posted on Jan 25, 2009


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Replaced upper intake gasket, still losing antifreeze this time not visible

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1 Answer

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1 Answer

Engine blew white smoke. I replaced the head gasket and intake(lower) gasket. It still smokes and is getting antifreeze I'n the cylinders. I did not replace the plenium chamber gasket. Their was some...

Hey Baptized,
You need to replace ALL the gaskets that seal coolant from ANYTHING... You may have a cracked head, cracked intake manifold,, or at worse a cracked block - between the coolant passages and the combustion chamber area...If you have a aluminum intake and cast iron heads.. this is a potential leak creator when the engine gets hot and cold quickly...make sure ALL the gasket surfaces are CLEAN.. and use:

DO NOT use silicone sealant - period!

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1 Answer

How do I replace the thermostat on my 2000 Buick Lesabre Limited 3.8 liter V6?

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4 Answers

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I had the same problem with my '87 Buick LeSabre 2 years ago. But it didn't seem to fit right, the car was running fine up until it just didn't. I had 3 professional mechanics swear it was a blown head gasket. I researched thoroughly and found out this particular engine make has a DEFECTIVE upper intake manifold which can break down and cause coolant to leak into oil, simulating a blown head gasket. The NHTSA had issued a recal on SEVERAL GM cars with this engine, EXCEPT for the '97. I filed a complaint with the ODI and as of today it is now COVERED as a "Defect & Recall". NHTSA ID number 96V116000. This MAY be your problem if it is NOT the "usual" blown head gasket. Hope this helps.

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2 Answers

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This is what they are talking about, a major problem for GM. Google it and you will see how big the problem is. Don't drive the car until you fix this.
The 3.8-liter V6 may leak coolant into the engine from the intake manifold. A new gasket kit, revised throttle body nuts, and sealing compound is available.

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Mar 10, 2009 | 2000 Buick LeSabre

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