How many have had EGR port burn through vs lower gaskets?
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From: CT
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??
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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From: Ames, Iowa
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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From: CT
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?
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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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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Re: upper
Originally Posted by SSEBONNE4EVA
JR,
Did you install the revised EGR tube or use the original?
Did you install the revised EGR tube or use the original?
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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Re: intake
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?
Came stock in 95 with a Delphi?
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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