coolant leak, 93 ssei - 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 07-02-2003, 12:16 PM   #1
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Default coolant leak, 93 ssei

Our '93 SSEi has a slow coolant leak that causes coolant to appear on the horizontal engine surface between the throttle body and the top of the tranny'* side cover. I can't see up behind the throttle body, so I can't see where it'* coming from.

I'm guessing the leak could be from the throttle body gasket or maybe the coolant passage area(*) of the supercharger gasket, since I've removed and cleaned the throttle body and also replaced the supercharger and gasket within the last year.

Can anyone tell me how to tell where it might be coming from, and what coolant leaks may be common on this side (driver'* side) of a series 1 supercharged engine?

I remember that I saw a little black gasket sealant residue on the intake around the 2 yellow coolant passage o-rings, but whatever was once there was long gone by the time I replaced the gasket, and I was told not to use any sealant on the supercharger gasket.

Shoud I try some Barr'* stop leak?

If it turns out to be the throttle body gasket, should I remove the throttle body and seal the gasket areas around the coolant passages with liquid permatex or something? The throttle body gasket is the thick one with the embedded blue rubber sealing surfaces, not the thin one the dealer tried to sell to me instead; I re-used the old one.

Thanks.
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Old 07-02-2003, 02:58 PM   #2
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Yeh it might be your supercharged intake gasket... That would cause coolant leakage and could be in that region to..
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Old 07-22-2003, 11:55 AM   #3
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If anyone'* interested, the leak wasn't coming from the throttle body gasket or the supercharger gasket.

A couple of bolts on the top of the upper intake weren't tight, so I tightened them. I have no idea why only a couple of them were loose and how that happened, but I've been checking the coolant level over the last few weeks and it looks like the leak has stopped.
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