What are the common causes for intake gasket leak on L36 - 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 04-30-2009, 07:37 PM   #11
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I got the Doorman replacement Plenum it included all the gaskets and assorted hardware for $133 from Autozone. Pontiac wanted $167 for just the Plenum. Turns out thr runners in my old one were melted internally and it was warped where the TB stud was missing for who knows how long. Im just taking my last break from putting it back together. It was so simple even I could do it! LOL
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Old 04-30-2009, 07:43 PM   #12
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Thanks. I didn't think you could get one from AutoZone.
I just wonder about the quality, knowing how some of the products they sell are el cheapo sometimes.
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Old 04-30-2009, 09:06 PM   #13
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Yeah you can get them from AZ or Discount/Advance. I am sure where you live whatever big chain is there sells them.

Here is the Doorman page:
https://www.dormanproducts.com/cgi-b...rch_cat=Intake Manifolds,Intake Manifolds&st_amount=0&end_amount=999999999.99&star t=0&vfrom=&prev=yes&vnext=no&category_list=1504:78 :0
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Old 05-01-2009, 01:27 AM   #14
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Im glad I decided to look in the manifold while changing the UIM gasket. The damage is wores than the pictures show.

This is the runner closest to the EGR tube



Here is a comparison. New on top

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