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8.1 Exhaust Manifolds Warped?

ss502gmc

By ss502gmc
in 2000-2014 Silverado HD & Sierra HD

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ss502gmc Enthusiast

ss502gmc

Posted
Posted

My local exhaust shop said that my exhaust manifolds are warped and that they cant be planed. So i been looking for new ones for close to a month now and cant find them anywhere. All i find is manifolds for the 6.0 and duramax and thats it! Ive googled and tryed ebay and cant find them anywhere. So my question is these are stainless steel and supposedly dont warp so what do i do? And where can i get new ones? i havent called the dealer yet and dont really want to because im scared at what they would say. But has anyone else had this issue with there 8.1?

xwire Enthusiast

xwire

Posted
Posted
My local exhaust shop said that my exhaust manifolds are warped and that they cant be planed. So i been looking for new ones for close to a month now and cant find them anywhere. All i find is manifolds for the 6.0 and duramax and thats it! Ive googled and tryed ebay and cant find them anywhere. So my question is these are stainless steel and supposedly dont warp so what do i do? And where can i get new ones? i havent called the dealer yet and dont really want to because im scared at what they would say. But has anyone else had this issue with there 8.1?

 

if you want a set of replacement manifolds that I pulled off of my rig that I would be interested in selling

jpringle3 Enthusiast

jpringle3

Posted
Posted

If you call around to local automotive machine shops, ask if they have a belt grinder set-up. they can be machined flat, I have had a lot of them done, it was not expensive the hardest part was finding a shop that had the equipment.

die hard Enthusiast

die hard

Posted
Posted

i had 3 broken studs in my head on my 8.1 and my manifold is warped downward i drilled out the studs and tight it up is much quiter but still a little leak iam scared to remove the maifold and buy a new one i called the biggest dealer around in manchester n.h. they stock every part you can think of but not manifold for 8.1 ? but they can get it for around $800 that hurts

Supersporter40 Enthusiast

Supersporter40

Posted
Posted

Diehard,

what did you use for replacement studs (what source)?

 

My #7 port is leaking. Local mechanic quoted 250-350 to fix each side. Hoping my case is a broke stud only (what he said was likely wrong). Tempted to try fixing it myself at that price.

die hard Enthusiast

die hard

Posted
Posted
Diehard,

what did you use for replacement studs (what source)?

 

My #7 port is leaking. Local mechanic quoted 250-350 to fix each side. Hoping my case is a broke stud only (what he said was likely wrong). Tempted to try fixing it myself at that price.

i was not able to remove the old stud i broke one easy out and gave up try to remove the stud's and then tap threds inside the old stud i had drilled i went to hardware store and a couple of full thred bolt's and used nuts to tight em up i did not want to use a hard bolt so if they break will be easyer to drill out .....may not be the proper way to fix but some times you gotta do what have to so far a month latter and is still holding up [knock on wood]
Supersporter40 Enthusiast

Supersporter40

Posted
Posted

That doesn't sound like that bad an idea Bill. It is such a pain to get in there at the best of times. The shop here said they like to weld a nut on the stud if it is protruding. This upsets the stud and hopefully contracts it enough to remove easier. Have done it with 90% sucess in the past on machinery and such.

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