Leaking exhaust? - Page 3 - 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 08-04-2005, 11:16 PM   #21
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Quote:
Originally Posted by LuxuriesPremier
So the plugs should look dry right not wet or white. If there good
kcik the cat if it rattles it is no good ? or is it just loose or something where u can fix that without buying a new one. I looked under the car today and it wasnt glowing ....
it might not be glowing...

basically the cat is a honeycomb filter... it falls apart and clogs itself...

mine actually got so plugged and hot it blew a hole in the side...

check it out
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Old 08-05-2005, 12:07 PM   #22
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my 90 rattles. I don't think its plugged though. It gets good mileage.
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Old 08-05-2005, 07:35 PM   #23
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my 90 rattles. I don't think its plugged though. It gets good mileage.
sometime instead of clogging itself, it blows chunks out of the cat out the exhaust... then basically you have a SUPER HIGH performance cat...nothing in there... the rattle in there might be stuff that hasnt come out yet
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Old 08-06-2005, 07:07 PM   #24
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I did a real test yesterday on my mileage and i get about 20mpg average between highway and city. I guess thats normal but im still stuck on the performance issues of my car.
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