Melted Upper Intake Manifold 1993 3800 - 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 12-31-2006, 08:06 PM   #21
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Quote:
Originally Posted by Damemorder
I'm running mine with all those interior ridges knocked clean off. Definatly from overheating, My EGR cracked in half.
You mean you didn't change the UIM?? Holy crap--I wasted big bucks buying one then!!

One a side note: HAPPY NEW YEAR TO ALL


Ravi
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Old 12-31-2006, 08:36 PM   #22
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Well, I don't have coolant flowing through there anymore. I blocked it at the LIM to try to keep heat soak of the UIM & TB down a bit. Not worth doing on your car as I bet you want it to run okay in the winter.

I bet yours is just old age and heat cycles contributing to the degradation of the plastic. I would call this normal wear on a 14 year old car.
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Old 01-05-2007, 12:01 AM   #23
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Default problem solved ( I hope)

Well I got the van back from my mechanic today. There seems to have been two problems. Changing the UIM must have solved a vaccuum leak but the bucking/stalling continued. As it turns out there were about 8-10 burnt/broken wires in the loom under the alternator. They have been replaced and all seems well. I will probably punch the cat anyways since I won't have to do an emissions text until 2008 and I likely won't have the van by then. I might as well take advantage of the extra power and gas mileage

I hope this helps others troubleshoot and I wanted to again express my gratitude to those who helped.

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Old 01-05-2007, 12:30 AM   #24
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You wan't get performance from a punched cat, Just a ticket waiting to happen.
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Old 01-05-2007, 02:49 AM   #25
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I didn't know that there is no gain from punching a cat. I keep thinking of my GN. There was a noticeable difference there.

Is there really ZERO gain??

thanks,

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Old 01-05-2007, 03:00 AM   #26
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Unless it'* messed up, 0 gain.
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