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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 08-18-2005, 10:44 AM   #11
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Steve, I can tell you that leaky valve covers are not nearly as likely as the lower LIM seals. The seals underneath your LIM ( the big thing under your SC) and the block (main part of the motor). The oil leak will typically come from the ends of these seals where the heads, LIM, and block all meet in the corners. I have pics of that.

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See the two gaskets with the orange traces in them? Look where they meet with the lower black seals on the far right and the far left. The two black seals on each end that are oriented up and down in the pic? With thin ribs on them? At the ends of those seals.

Can you use this pic to identify the leaks?
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Old 08-18-2005, 11:24 AM   #12
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thats the pic and i started to use yours as a reference yesterday but just wanted to make sure. Do you all have faith in me if I get the gasket and read the Chiltons manual thoroughly that i can do this job myslef? Id it realy easy or going to be hard because i have to take the supercharger off?


BTW.....do you all see the long vacuum hose on teh right side and underneath the metal with the righting on it with GM and some numbers? hard to tell, but that is were the oil is coming out. Not like its gushing out or anything but that is the visible spot. I did clean my motor 3 weeks ago and i am positive now that the gsket need chacning. Is this another reason for low oil pressure?
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Old 08-18-2005, 12:14 PM   #13
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That would be the black seal (gasket) directly above the GM castings. Those are the casting marks on the block. My suspicions on your leak are confirmed.

The oil won't GUSH out of there, as it'* not a pressure leak. The oil is just spattering around in there off the lifters, pushrods, and balance shaft. It kindof wicks out past those seals when the ends start to erode from head heat.

This isn't a SIMPLE job by any means, Steve. I suggest a helper that'* done it before.
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Old 08-18-2005, 12:41 PM   #14
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Quote:
Originally Posted by willwren
Steve, I can tell you that leaky valve covers are not nearly as likely as the lower LIM seals. The seals underneath your LIM ( the big thing under your SC) and the block (main part of the motor). The oil leak will typically come from the ends of these seals where the heads, LIM, and block all meet in the corners.
Valve covers are less common than LIM'*? Maybe on the early 90'*, my experience while limited seems to point toward more common than LIM'*.
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Old 08-19-2005, 08:32 PM   #15
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I have to wait to get paid before I can get my oil changed. I noticed today after dropping my brother off at the airport that my temp gage was at 240* again and the oil pressure was at 12psi. Im getting scared now. Is the oil change all I have to worry about? I will get the gasket replaced soon but will teh oil chage and filter build my pressure up? The oil is still at the half mark on the dipstick and its thin.
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Old 08-21-2005, 01:15 AM   #16
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bump
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Old 08-21-2005, 02:47 AM   #17
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You're making me nervous here.

Please park the damned car until you find out what the problem is, and before you toast an egine over a piddly little oil leak.

Low oil pressure and increased coolant temperature is an ominous set of signs. Oil is a coolant, too.
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Old 08-21-2005, 11:28 AM   #18
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Quote:
Originally Posted by willwren
That would be the black seal (gasket) directly above the GM castings. Those are the casting marks on the block. My suspicions on your leak are confirmed.

The oil won't GUSH out of there, as it'* not a pressure leak. The oil is just spattering around in there off the lifters, pushrods, and balance shaft. It kindof wicks out past those seals when the ends start to erode from head heat.

This isn't a SIMPLE job by any means, Steve. I suggest a helper that'* done it before.
i did mine before
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Old 08-21-2005, 11:56 AM   #19
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Quote:
Originally Posted by Bob Dillon
Please park the damned car until you find out what the problem is, and before you toast an egine over a piddly little oil leak.
I had posting problems and all my comments apparently didn't make it in here, so I'm adding them back now:

Steve, if you drive that car one more time in it'* current condition, and I find out about it, I will no longer help you work on your own car. This would be the 4th Bonneville you've destroyed, and you already have from your first major problem a month ago. That motor ALREADY isn't right from overheating. I gaurantee you have bottom end damage. You're making it worse now.

Park that car until someone PROFESSIONAL can deal with it.

Quote:
Originally Posted by ssesc93
I have to wait to get paid before I can get my oil changed. I noticed today after dropping my brother off at the airport that my temp gage was at 240* again and the oil pressure was at 12psi. Im getting scared now. Is the oil change all I have to worry about? I will get the gasket replaced soon but will teh oil chage and filter build my pressure up? The oil is still at the half mark on the dipstick and its thin.
Your oil is thin, low, and pressure is dangerously low. You're running insane temps again. The damage you started 2 months ago or so is now worse. And will continue to get there. My suggestion is to get the car fixed, and try to sell it immediately. But not on this forum. It will continue to get worse.
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Old 08-21-2005, 12:05 PM   #20
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Quote:
Originally Posted by ssesc93
I have to wait to get paid before I can get my oil changed. I noticed today after dropping my brother off at the airport that my temp gage was at 240* again and the oil pressure was at 12psi. Im getting scared now. Is the oil change all I have to worry about? I will get the gasket replaced soon but will teh oil chage and filter build my pressure up? The oil is still at the half mark on the dipstick and its thin.

Steve, 240F is the temperature of the Coolant in the block, yes thats right water temperature... This is not the temperature of the engine its self, but the temp of the water within the cooling passages...

At 240F coolant temp you are frying the bottom end of the engine... 12psi tells me the whole story... You are frying the crapp out of the oil and cooking the bearings in the bottom end... as hot as you have gotten this car in the past, I would not be supprised if you have already done damage to the bottom end of that engine already....

Please do not drive the car untill you can have the problem rectified...

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