leaking LIM gaskets??? - 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 01-19-2007, 04:40 PM   #1
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Default leaking LIM gaskets???

ill let the pics do the talking

standing on the drivers side of the car.....looking between the Rad hose and the TB
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Drivers side of the car... behind the TB.....you can see the Coolant Temp sensor
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Drivers side of the car....looking between the EGR and the Rad hose
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here is the sludge that i wiped off near the Coolant temp sensor where the LIM meets the rear head
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Old 01-19-2007, 04:44 PM   #2
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Hey, thats the same spot mines leaking
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Old 01-19-2007, 04:56 PM   #3
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Definitely looks like a leak gasket to me. Is the underside of the TB dry?
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Old 01-19-2007, 05:11 PM   #4
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I agree. Check the throttle body gasket for leaks first - then the LIM gasket.
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Old 01-19-2007, 05:27 PM   #5
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yes TB is Bone Dry....been there done that gasket already
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Old 01-19-2007, 05:28 PM   #6
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We diagnosed this one over the phone.. go get it done. :P
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Old 01-19-2007, 05:29 PM   #7
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Quote:
Originally Posted by BillBoost37
We diagnosed this one over the phone.. go get it done. :P

not untill the plastic thing ontop of the motor dissapears
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Old 01-19-2007, 05:45 PM   #8
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^^^

Haha. Well, I can tell you that mine was leaking at those same points, but it was because both sides of the gasket were missing. Usually when the LIM is replaced, goop is used on those corners where the gasket doesnt quite fill in. I am suspecting that this is the case with yours and once you pull the lower, you will see what im talking about if you dont already know.

In this pic, the orange silicone shows the corners im talking about.


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Old 01-19-2007, 06:22 PM   #9
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First time I did it I put gobs on top and bottom of the corners like shown below, but it still leaked, so when I redid it I put gasket maker along the entire surface of the seals.
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Old 01-19-2007, 07:23 PM   #10
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keep in mind these Gaskets are the OEM and were put on the car in 3-93, and have about 95K on em....
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