How many have had EGR port burn through vs lower gaskets? - 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 03-25-2005, 05:30 PM   #1
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Default How many have had EGR port burn through vs lower gaskets?

How many have had EGR port burn through vs lower gaskets?
Just curious because my local GM tech friend said you are more likely to have
lower gasket failure.
So how many have had the plastic intake burn through??
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Old 03-25-2005, 06:50 PM   #2
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Just for the record - my '95 L36 with 127,000 miles had good-looking GM (blue) lower gaskets, and the upper plastic plenum would have lasted a while longer although it showed evidence of serious deterioration towards the cooling passages. The face of the upper where the TB attaches was pretty badly warped - not enough to cause a leak, but not pretty.
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Old 03-25-2005, 09:12 PM   #3
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Replaced my upper last summer because of a leak. Turned out to be leaking at the TB. No deterioration at the EGR port. 112K at that time.
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Old 03-26-2005, 11:20 AM   #4
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Default upper

Changed mine @73k due to a small leak - (turned out to be the throttle body gasket).
Lowers looked awful but no failure.
Upper had slight burning to plastic but no failure.
Upper gaskets were OK but intalled new anyway.
So how common is burn through @ the EGR port?
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Old 03-26-2005, 12:02 PM   #5
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Mine burned through and caused a nasty rupture... The lower gaskets were still alive... Happened at 87,000 miles I think..... This Delphi upper seems to be holding up, 5.5 years with no coolant loss, and the EGR coolant ports look good... We'll see...

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Old 03-27-2005, 11:09 AM   #6
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Default upper

JR,
Did you install the revised EGR tube or use the original?
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Old 03-27-2005, 12:00 PM   #7
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Default Re: upper

Quote:
Originally Posted by SSEBONNE4EVA
JR,
Did you install the revised EGR tube or use the original?
The dealership did the work... I had an extended warranty on it....

The original intake and all stayed... When I did my throttle body I discoverd that the stove pipe was the same... No change... So mine does touch the upper intake without a gap..

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Old 03-27-2005, 09:19 PM   #8
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Good thread!

My upper was 100% intact. My lowers were wasted. If I were to have a failure I'm convinced it would have been as a result of the lower gaskets.
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Old 03-28-2005, 12:12 PM   #9
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Default intake

How did your original intake stay if it ruptured? could they have installed the sleeve?
Came stock in 95 with a Delphi?
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Old 03-28-2005, 02:19 PM   #10
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Default Re: intake

Quote:
Originally Posted by SSEBONNE4EVA
How did your original intake stay if it ruptured? could they have installed the sleeve?
Came stock in 95 with a Delphi?
The lower intake stayed and the upper was replaced.... The lower gaskets were also replaced...

The lower stayed along with the stove pipe... Stock for mine was a Rochester upper, the replacement was the Delphi upper in 99..

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