Coolant Drain Plug - Page 2 - 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 02-16-2005, 12:39 PM   #11
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Quote:
Originally Posted by vital49
Your radiator might be cracked. It could be such a small crack that it only swells when hot.

I agree with MOS.... Warm it up and get under there with a mirror and flashlight. Don't add anymore "mechanic in a bottle". That stuff only reaks more havoc down the road.
Yes. Stopleak plugged the radiator in my dad'* older truck
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Old 02-16-2005, 12:57 PM   #12
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Quote:
Originally Posted by vital49
Your radiator might be cracked. It could be such a small crack that it only swells when hot.
You are absolutely correct. It only leaks when the coolant is very hot (I'm not talking operating temp hot where the Tstat is open and the upper rad hose is hot, but after driving for a little while).

John Deere Boy, how long does it take the Super Leak sealer to work in? I've city driven about 15 minutes twice a day for the last two days. I also ran it for 20 minutes while parked as the instructions said.

I won't put any more in now.

Thanks, fellas.
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