1994 intake manifold - replace? - 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 07-03-2007, 03:22 PM   #1
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Default 1994 intake manifold - replace?

I just purchased a 1994 SE with 97,000 miles. Everything ran fine when I purchased it, but it just smoked for about 1 minute after starting. It had sat for a few days and I figure it is oil leaking past a valve seal. After doing some reading it seems the 3.8l engines have intake manifold problems, but it is not clear to me if it happens to the L27 engines in a 1994. I was going to have it replaced to be safe, but now I am not sure. Should I have it replaced? Anything else I should have replaced? I want to avoid the engine failures I have read about.

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Old 07-03-2007, 03:28 PM   #2
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The intake manifold problems didn't start until 95, so your'* is most likely fine. The EGR routing changed for 95 and created a weak spot. Your smoke could be leaky valve stem seals.
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Old 07-03-2007, 04:02 PM   #3
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Thanks, I assume the leaky seals will be OK as long as I am not burning too much oil. Any other problems to look for on the 1994? The car is in great shape and I would like to drive it for a few years if I can.
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Old 07-03-2007, 04:10 PM   #4
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Don't beat on it. The 92-94 L27 typically lasts a really long time. My family has 2 92'* that are still running fine at nearly 400k miles each. The tranny is the weak spot. 100-150k is when they fail if they are gonna.
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