seems as though the PN for the upper intake gasket has just gone through a change... from gmpartsdirect the pn is 17113137, but when I called up SPO, they had ZERO stock available in the country... so I talked to someone in person at SPO, and it seems that the part number has changed:

89017559

i'm picking one of these up in a few days, so i'll post some pics and let you guys know if it'* changed at all...

matt

Hi Matt thanks for the information will be looking forward to the pictures.

i'm not too sure on that, but i'll be taking tons of pics this weekend (upper and lower gaskets, along with misc stuffs that should be done), and i'll look for some sign of it on the casting.
at this point, most of the people who were around for the original upper intakes and stovepipes are no longer in the same respective positions down in Flint, so finding out information gets harder and harder w/time - record keeping today is very different than 9 years ago... and there'* still room for improvement
but i'll see what i can find

alright folks, I've opened up the new gaskets, as well as removed the old, and there'* some interesting notes...

pic whorage will ensue later tonight. but for a first crack, there is now a separate throttle body gasket, separate from the upper intake (which of course sucks, cause i'm not replacing the upper intake, so it no longer works with the gasket).

but that means, there'* a new upper intake on the way. right now SPO shows 2 in the entire country available for purchase, which was attributed to over-demand from dealers, but having looked at this new gasket for the throttle body, it seems like its meant to work in conjunction with a revised upper. not too different mind you, because the actualy gasket still matches in all the same ports. as it would, cause otherwise you'd have to replace the lower...

in any event, the question now is whether or not the throttle body gasket will pull out of the upper intake, or if it'* in there for good. i have my intakes sitting on the garage floor of theJMFC, and I'm not quite willing to pull the existing gasket out of the intake manifold, cause i'm not convinced it should really come out

in any event, pics will come soon. jr's3800, my upper intake is actually AC Rochester, along with the fuel rail. the manufacture date of the upper is 10/12/95.

the other thing - when i worked on someone else'* 3800 vin K from 99, i don't seem to remember the upper actually having a metal piece in it around the EGR - i could just be remembering wrong, but its deff. there on my engine, and I can guarantee that this thing has never been pulled apart before.

full pics, tech info on upper and lower replacement/rr will be coming shortly/w.in the next week or so -

matt

okay, here'* what we gots.


egr pipe going into original late 95 intake


ac rochester label


new throttle body gasket


the old (in the manifold) throttle body gasket


original casting date of upper intake (which shows zero signs of degradation)

if you really want the larger pics (like 7-800k, ask, and you shall recieve. bunches more on the way for a post and write-up on the whole procedure)

matt

oh yeah, need opinions on whether i should dare to remove the old throttle body gasket from the upper intake, or take it as a blessing that i haven't had any problems related to the intake itself yet...

matt

Hi Matt it looks like the stovepipe came out with the upper intake. Can you pull the pipe out of the upper manifold or is it melted in place?

there was no pressure at all in removing the upper intake: ie, the stovepipe is part of the upper, not the other way around. that'* not to say it wouldn't come out if i wanted it to, but it was deff not stuck in the lower at all - we didn't have to force anything on the upper to make it come off -

matt

are you guys seriously this un-interested in this?
?

i used the old intake...

the deal with that, my intake showed ZERO sign of wear from the EGR (how awesome is that??).

Hey, if you're opening up your motor anytime soon, do me a favor - measure how far the egr stovepipe is sticking out over the surface inside the upper. mine was over that edge by about 1/8th of an inch (at least) and the carbon buildup on it turned out to be the reason that it came out with the upper.

i could deff. understand that if a dimension changed, if that sucker wasn't sticking out far enough, it could really make things worse...

matt