*sigh*

i know. i'm trying to point you in the right direction. and i'm tryin to say, if the upper intake is failing because of a system, don't assume that the changes made were to the upper intake - look at the whole system.

matt

Does anyone have a pic of the 2000 or later series II EGR pipe.
Maybe there was a change in that. It seems to me if you re-rout it away
from the exhaust manifold and make slightly bigger fins on it you could
scrub about 15 - 20 deg. off of the hot EGR gases.

now i think you guys are heading in the right direction...

matt

Hey Guys,
I just bought a 2001 plenum off of Ebay cheap.
It too doesn't have any reinforcements in the collant passages but is in excellent
shape. I plan to clean it with fastorange citrus cleaner.
Don't sweat it, GM could have upgraded the composite material to a higher heat
resistant design but nobody knows for sure. Maybe a high tech nut at the dealer would that has been to a seminar.
Even if I put it on and it lasts another 100k I view it as a cheap fix for about
2 hrs labor. Kinda like changing a water pump that lasts 100k.
The only thing it didn't come with is the lower gasket.
Has it been upgraded? or maybe I'll re-use if its in good shape.
Its good maintainence to remove the throttle and clean the back side once in a while
anyway.

don't re-use the old gasket. just askin for trouble that way - it costs some 20 bucks from gmpartsdirect and will save you the hassle of re-fixing down the road.

and fwiw, i already knew that the intakes were the same just tryin to spur the thoughts in the right direction

matt