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.

Engine giving me HELL

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Old Mar 19, 2011 | 05:48 PM
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Have you checked the coolant level? If it'* going down then your leaking coolant in to the engine. The UIM may be cracked and leaking coolant in to the engine.
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Old Mar 19, 2011 | 06:19 PM
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I just got done replacing mine(96 Regal 3. the first of the year. When we got the car it had 131K and the gaskets had just been replaced so I thought we were good to go. At 140K we got the dreaded white smoke and the engine quit, hydrolocked!" After teardown I found that the EGR nipple that goes through the bottom of the UIM had "cooked " the plastic and there was a hole from the water passage into the UIM that you could stick a small phillips head screwdriver through which filled the UIM with water. Check the date on top of the intake(3 places) to see if it has been replaced as mine was the original. I used the improved design with a metal ring around the EGR hole and alumium LIM gaskets from GM. All is well since repair. Good luck!
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Old Mar 19, 2011 | 07:48 PM
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Did this start before or after the UIM job?
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Old Mar 21, 2011 | 07:41 AM
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Veg... I've offered help on more than one occasion. Never hear a thing back from you.

Would you like a hand? I'm local and I like to think I know a little about these cars.
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Old Mar 22, 2011 | 12:41 PM
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do a compression test to verify that your engine sealed right at first. then do a coolant leak test, put the system under pressure to verify its not leaking out as well. make sure your oil pan gasket isnt leaking badly as well as PCV valve. i have seen once, but still, seen it the car would do similar smoking w/leaking gaskets to crankcase.
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Old Apr 2, 2011 | 07:22 PM
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Bubbles in the radiator has me thinking blown head gasket, even though it rarely happens on these engines.

If the oil looks like chocolate milk, then it has water in it.

A compression test may show a blown head gasket, you should see a cylinder with lower compression then that others. A leak down tester my be a better option in this case.
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Old Apr 4, 2011 | 08:19 AM
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When you say drained it back out, the cylinders or radiator?
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