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Oil pan gasket leak

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Old 01-13-2008, 08:40 PM
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Default Oil pan gasket leak

I have a 97 Bonneville that I changed the oil pan gasket on about 2 years ago. It is now leaking again. Does GM have a mod for it so when I put a new one on it doesn't start leaking again?
Old 01-13-2008, 08:55 PM
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im not sure what you mean by a mod, but i would only assume that the proper torque was not applied. but are you certain its coming from the pan?


and welcome to BC btw
Old 01-13-2008, 09:01 PM
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I put torque wrench on it. I have read on some of the defect web sites that GM has put out a service bulletin out on this problem and didn't want to pay for it!
Old 01-13-2008, 09:05 PM
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I've done mine twice in the 9 years I've owned it. I don't think that'* a problem that GM needs to do something about, unless the 97 is in someway different than my 95.
Old 01-13-2008, 09:09 PM
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alot of "oil pan" leaks is actually a leaking/loose end plate in the rear of the engine. you have to pull the tranny to get to it. My 97 always had a wet oil pan, when my tranny was out for rebuild we found that plate wasn't even finger tight and the gasket was cracked. Since the gasket replacement my oil pan has been dry.
Old 01-13-2008, 09:11 PM
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my series 1 had 130k on it and was fine. the only reason i changed it was cuz i changed the timing chain and dropped the pan for coolant.

but idk if there is a problem with the ser 2 oil pans. what is wrong with them?
Old 01-15-2008, 07:12 PM
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I always torque mine from the center out like you would a cylinder head or intake. Otherwise, you can slightly warp the mating surface and develope a leak
Old 01-15-2008, 09:21 PM
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Originally Posted by TheDude
I always torque mine from the center out like you would a cylinder head or intake. Otherwise, you can slightly warp the mating surface and develope a leak
yes, i forgot to mention that. i do that with everything. even if the book doesnt say to.

good thinkin.
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