another intake question - Page 2 - 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 11-03-2004, 12:33 AM   #11
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Cool...well, kinda. Means I got a little bit of work in front of me.
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Old 11-03-2004, 02:07 PM   #12
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Quote:
Originally Posted by Ranger
Ken-co http://www.ken-co.com/manifold/ makes a "repair" kit for the manifold. I don't know if it would work or not but I liked the idea so much that when I did my upper I made a new stove pipe and sleeve like the one pictured in the above link. I think it will prevent burn through (although mine hadn't in 100K) by keeping an air space (mine had .050) between the hot stove pipe and the manifold which will now be protected by a sleeve. Although the kit is rather expensive ($80) I think it is a good preventative idea. Obviously you would not use the epoxy.
Be careful with using that kit from Ken-co. I bought it and went to install it, only to find out that it was too big for the port in the manifold. They returned my money for the part... If I had to do it all over again, I'd spin out a custom one on a lathe.
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Old 11-03-2004, 07:25 PM   #13
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Quote:
Originally Posted by vital49
Quote:
Originally Posted by Ranger
Ken-co http://www.ken-co.com/manifold/ makes a "repair" kit for the manifold. I don't know if it would work or not but I liked the idea so much that when I did my upper I made a new stove pipe and sleeve like the one pictured in the above link. I think it will prevent burn through (although mine hadn't in 100K) by keeping an air space (mine had .050) between the hot stove pipe and the manifold which will now be protected by a sleeve. Although the kit is rather expensive ($80) I think it is a good preventative idea. Obviously you would not use the epoxy.
Be careful with using that kit from Ken-co. I bought it and went to install it, only to find out that it was too big for the port in the manifold. They returned my money for the part... If I had to do it all over again, I'd spin out a custom one on a lathe.
I custom made mine on a lathe so it fit like a glove. I can not speak for Ken-Co as I only used their idea and design.
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Old 11-03-2004, 09:44 PM   #14
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-and, for what its worth, I used the Ken-CO kit, and it worked perfectly. (yes, their parts do fit tightly, -in my opinion, tighter than necessary.)

The above replies that mention the need to get the heat away from the plastic are exactly right on target. Heat from the EGR stove pipe is the whole reason the plastic fails in the first place.

From my perspective, everyone that just replaces the upper manifold with a new one, without the modification, are "resetting the time clock." ,, tick,,,, tick,,,,, tick,,, tick,,,
(-my guess is that their next failure will be about the same mileage as the first one,,)
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Old 11-04-2004, 02:43 PM   #15
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Default stove pipe

wait a minute.....
That would mean the 2001 and up guys are waiting for a failure?
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Old 11-04-2004, 03:09 PM   #16
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SSEBONNE4EVA, "You got it right Dude !!"


- sorry everyone, but that is my suspicion, "and I'm stickin' to it."

(-one thing for darn sure, time will tell,,,,)

One popular opinion (suspicion?) is that the replacement parts are made with a better grade of plastic. -personally, I have my doubts, BUT I hope "they" are right. And if there is any validity to that, then hopefully the "new" plastic will tolerate the heat a little better.

As for me, I chose to not mix exhaust gas heat with plastic.
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Old 11-05-2004, 12:18 PM   #17
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Default intkae failure

You are correct on your suspician 57thunder.
The newer Delphi intake put into sevice after the 99'* was improved to a higher
heat resistant material. I verified this through GM service.
Lets put the word out on the board......
Question: Has anyone with a 2000 and up Vin K Bonne experienced burn through
at the EGR pipe?????? This would be an intake marke Delphi below the map sensor..
Maybe we could move this question to the 2000 and up board?
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Old 11-05-2004, 01:47 PM   #18
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Hey, good idea, and good information.

-now we just need someone with their high mileage '00 or '01 to remove the throttle body, and do a good inspection to make sure that the newer plastic is holding up to the heat.

Thanks for the info.
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Old 11-06-2004, 10:47 AM   #19
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Default Delphi Intake

If this is a Delphi intake on this failure I would say its more than likely a gasket failure. Upper or lower.....
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