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.

Good Ol' UIM and LIM

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Old 04-17-2006, 10:30 AM
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Default Good Ol' UIM and LIM

Yep,

I got the update from my mechanic that i definitely have a leak from coolant/oil. He found it while doing new fuel lines. I have been suspecting it for a little while now.

I plan on doing this in a few weeks once school ends, but I need a little guidance.

What are the best gaskets to use?

Is there a metal replacement part that I could swap to prevent?

Any other tips on this project of mine?

Any good manuals that will help me do it step by step?

Appreciate the help in advance . . .
Old 04-17-2006, 10:34 AM
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First off...if oil and coolant are mixing...that'* bad. Especially for the bearings. We can't stress how bad any water is for the bearings.
Old 04-17-2006, 12:00 PM
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Definitely check out jr's3800'* article in techinfo

http://www.bonnevilleclub.com/forum/...e=article&k=38

You may also want to check out my link. I just did this job with my brother. I asked a whole bunch of questions regarding parts. I also posted pictures of the job.

http://www.bonnevilleclub.com/forum/...ic.php?t=47882

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Old 04-17-2006, 02:16 PM
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If it'* failing, DRAIN THE OIL NOW, and don't drive the car until it'* fixed or you'll be replacing the entire motor soon.
Old 04-17-2006, 03:39 PM
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BonBon,
Definitely read up on the links LiefW provided. Those are probably two of the most informative articles here. There are plenty more though. If you have any questions after reading through those, let us know.

And definitely don't drive it if you're already getting coolant in the oil. Just ask Bill B. how much coolant he found in the cylinders of one he changed. Bad...bad...
Old 04-17-2006, 03:58 PM
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Bill B also helped change that motor less than a month after because of the spun bearings.
Old 04-26-2006, 10:22 AM
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Thanks for all the help

I pm-ed cowboy gpx in getting a dorman for a good price.

The other stuff is in the mail!
Old 04-26-2006, 04:47 PM
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before you blow the money on a new upper, read this thread.

The fix may be easier than you think, and the total cost only gaskets and a coolant elbow.

http://bonnevilleclub.com/forum/view...53038&start=20
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