Leaking problem - 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 02-12-2008, 09:40 AM   #1
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Default Leaking problem

I started my car today and I noticed after a couple minutes there was smoke comming from the motor.I checked it out and it looked like antifreeze(green) was comming from the back driver side of the motor maybe my valve cover?
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Old 02-12-2008, 09:58 AM   #2
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There'* no coolant under the valve covers so it'* not that. Sounds like either your UIM just went kaput or you lost your LIM gasket. If it'* the LIM gaskets, best case would be to get a new UIM with a reduced diameter stovepipe (if you haven't already) as well as get new LIM gaskets (metal frame, new GM style).
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Old 02-12-2008, 10:01 AM   #3
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His UIM can't go kaput. He has a L27.
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Old 02-12-2008, 10:19 AM   #4
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Ahhh, good call. Didn't see an "i" and instantly thought L36. That might narrow it down then eh?
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Old 02-12-2008, 12:39 PM   #5
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is this a easy fix?
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Old 02-12-2008, 12:46 PM   #6
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Probably should try to pinpoint the leak before jumping on a repair.

Can you go and look for any trails or traces of where the leak is originating? Look at all sides of the engine for signs of coolant. What about where the heater hoses connect to the engine? What about the coolant elbow or waterpump?

Oops... reread and you said drivers-side and all those things I just mentioned were passenger side. How about the throttle body....look underneath to see if you have traces of coolant.
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