oil leak above filter - 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 03-02-2004, 10:09 AM   #1
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Default oil leak above filter

I have a nasty oil leak and it seems to be coming from the area of/above the metal block that the oil filter screws into (no, it'* not the filter seal). Is there a mating surface in that area that is prone to failure, or could this be a simple oil pan gasket throwing oil towards the filter mount?

It really only leaks while running and the rate is about a drip every 1-2 seconds (pretty bad!!)

Is this a common problem, what does it sound like to you guys?

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Old 03-02-2004, 04:56 PM   #2
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Front engine cover. Mine is doing the same thing, but not as bad. I was hoping it was just the oil pan gasket, but replacing it only slowed it down. I had a few leaks, oil pan (fixed), lower intake gasket (minor, ignoring for now), front cover (perplexing me).
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Old 03-03-2004, 12:34 AM   #3
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Can you give us a better description, or post a pic?
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Old 03-03-2004, 12:41 AM   #4
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Sounds like the front engine cover (per jwikoff99), so I'll be pulling the motor this w/e and replacing all the gaskets on the front end, along with the water pump etc.

With 80,000 miles on the clock, should I bother with the timing chain/sprockets, what kind of lifespan should I expect from them?

Lastly, while I have the motor out, is there anything else I should replace - things that tend to go wrong with this motor in the +/-100,000 mile range? I don't want to have to pull this motor again for a long long time!
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Old 03-03-2004, 12:46 AM   #5
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I'm not saying what your is, just what mine is, and your symptoms are similar.
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Old 03-03-2004, 12:48 AM   #6
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Could also be the gasket beneath the lower intake on the end of the block. The corner where the head, lower intake, and block all meet. This is a typical NON-PRESSURE leak point.

There'* a pic on my website in the gallery of an L27 torn down with these new (blue) seals installed for reference.
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Old 03-03-2004, 12:36 PM   #7
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With the rate that it'* coming out I just can't believe it'* a non-pressure leak. A drip every second just seems like it'* gotta be coming from something closer to the oil pump

jwikoff99; I understand that, but your assessment makes a lot of sense.

Thanks all!
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