Exhaust manifold trouble

Olds64 · 01-04-2008, 05:54 AM

HELP! I am tearing apart my 455 and when I took the pipes off of the exhaust manifolds 3 bolts broke off and are stuck in the manfold. The bolts are broken off flush with the manifold surface. There is about 1/4" of the bolt sticking out of the opposite side of the hole. What would be the best way to get these out? Should I try an EZ out, or should I drill them out with a larger drill bit and put a HeliCoil in? Someone at the auto tech center on base said I should heat them up with a torch and try to get them out the back of the hole with a pair of vise grips. I think the bolt would just smash and the threads would get damaged. I have never had any luck with vise grips. I will take some pics tonight if I get over to the auto tech center.

joe_padavano · 01-04-2008, 06:24 AM

Quote:

Originally Posted by Olds64

HELP! I am tearing apart my 455 and when I took the pipes off of the exhaust manifolds 3 bolts broke off and are stuck in the manfold. The bolts are broken off flush with the manifold surface. There is about 1/4" of the bolt sticking out of the opposite side of the hole. What would be the best way to get these out? Should I try an EZ out, or should I drill them out with a larger drill bit and put a HeliCoil in? Someone at the auto tech center on base said I should heat them up with a torch and try to get them out the back of the hole with a pair of vise grips. I think the bolt would just smash and the threads would get damaged. I have never had any luck with vise grips. I will take some pics tonight if I get over to the auto tech center.

I assume you're talking about the bolts at the exhaust pipe flange? I've had very good luck with the heat and vice grips method. Be sure to get the manifold ear red hot and thread the stub out the backside. Failing that, the Helicoil is the next solution.

J-(Chicago) · 01-04-2008, 12:29 PM

Or you could just buy another one from someone on R.O.P. dirt cheap.
They probably have piles of them from header swaps.

Think about it, if it's going to take you 3 hours to mess with plus a mapp gas cylinder.
Assuming you want to pay yourself 20 bucks an hour for labor, $60 bucks is guaranteed to snag you a good mani.

Oldsguy · 02-06-2008, 10:58 AM

Hey son, I found this over at the HAMB. good luck

http://www.jalopyjournal.com/forum/s...0425&showall=1

Run to Rund · 03-29-2008, 10:05 AM

Maybe your car is telling you to upgrade to the branched manifolds

Kroil or Mopar rust penetrant might help, heat usually helps if you get it hot enough. Next time use good grade 8 bolts and Never Seez.

01-04-2008, 05:54 AM	#1 (permalink)
Olds64 Landyacht Club President Join Date: Jul 2007 Location: Lawton, OK Posts: 1,811	Exhaust manifold trouble HELP! I am tearing apart my 455 and when I took the pipes off of the exhaust manifolds 3 bolts broke off and are stuck in the manfold. The bolts are broken off flush with the manifold surface. There is about 1/4" of the bolt sticking out of the opposite side of the hole. What would be the best way to get these out? Should I try an EZ out, or should I drill them out with a larger drill bit and put a HeliCoil in? Someone at the auto tech center on base said I should heat them up with a torch and try to get them out the back of the hole with a pair of vise grips. I think the bolt would just smash and the threads would get damaged. I have never had any luck with vise grips. I will take some pics tonight if I get over to the auto tech center. __________________ "Some men are Baptists, others Catholics. My father was an OLDSMOBILE man." Ralphie Billingsley A Christmas Story 1983 "We rei-eign, supreme, ooooh god! Burrito supreme, and a chicken supreme, and a CUTLASS SUPREME!" Tenacious D 2007

01-04-2008, 12:29 PM	#3 (permalink)
J-(Chicago) Seasoned beater pilot. Join Date: Jan 2007 Location: Chicago Posts: 1,650	Or you could just buy another one from someone on R.O.P. dirt cheap. They probably have piles of them from header swaps. Think about it, if it's going to take you 3 hours to mess with plus a mapp gas cylinder. Assuming you want to pay yourself 20 bucks an hour for labor, $60 bucks is guaranteed to snag you a good mani. __________________ I'd rather have a numbers matching poker hand.

02-06-2008, 10:58 AM	#4 (permalink)
Oldsguy Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 3,167	Hey son, I found this over at the HAMB. good luck http://www.jalopyjournal.com/forum/s...0425&showall=1 __________________ Dan '77 Cutlass Supreme '46 2 door

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03-29-2008, 10:05 AM	#5 (permalink)
Run to Rund Senior Member Join Date: Mar 2008 Posts: 157	Maybe your car is telling you to upgrade to the branched manifolds Kroil or Mopar rust penetrant might help, heat usually helps if you get it hot enough. Next time use good grade 8 bolts and Never Seez.