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03-01-07, 11:12 AM
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#1 (permalink)
| | Forum Regular
Join Date: Apr 2003 Location: Washington DC
Posts: 176
| replace exhaust pipe studs with bolts?
Has anyone replaced the exhaust manifold studs with bolts? if so, any particular kind/rating? any pros/cons that I should think about?
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Chaka
1974 fj40
Washington DC
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03-02-07, 06:48 AM
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#2 (permalink)
| | Forum Lifer
Join Date: Jan 2004 Location: Lexington, KY
Posts: 3,942
| Cons: You can't hang the manifold and intake from the studs while installing making it harder, If the bolt gets stuck in the head you more than likely will snap it off in the head. Studs allow you to use brass nuts, if the nut freezes to the stud you can easily just strip it off without harming the studs.
Pros: Bolts are cheaper otherwise I can't think of any... | |
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03-02-07, 08:02 AM
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#3 (permalink)
| | Site Addict
Join Date: Apr 2004 Location: san pancho, ca
Posts: 1,476
| Only recently found out about running brass nuts...exhaust guy said it was the only way to fly 
__________________ 1972 FJ40
2F, sm465, Detroit-R/Aussie-F w/4.56, Longfield SS, SUA - Rear FJ55 lift-springs x4, Disc Brakes, 315/75R16 KM2, 96" WB Help the Honey Bees | |
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03-02-07, 08:07 AM
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#4 (permalink)
| | Forum Lifer
Join Date: Jan 2003 Location: Kansastitty
Posts: 7,353
| And don't forget the anti-sieze
Ed
__________________ My Anger-Management Class really pisses me off
'66FJ40, Fresh 2F, H42/Orion(By Poser... LCR4WD), ARB Front/rear(By Poser... LCR4WD), MetalTech Cage installed by Poser, Screw-ups fixed(by Poser) 4WDB Corvette Master, Mini Truck PS, 3.5" Lift, Warn 8274, 33s on stockers, WhiteKnuckle sliders  | |
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03-02-07, 08:16 AM
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#5 (permalink)
| | Forum Lifer
Join Date: Jan 2004 Location: Lexington, KY
Posts: 3,942
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Quote:
Originally Posted by mr_Manny  Only recently found out about running brass nuts...exhaust guy said it was the only way to fly | Yep, I had the local machine shop tell me about this trick when I had a set Ford 360 heads freshened. While removing the exhaust I had broken off 3 bolts in the head! Two I was able to fix but they had to get the third one out. When I went to pick them up the guy had a set of hardened studs, brass nuts and washers in a bag. All for $10 extra. He explained he did not want to extract any more broken bolts and to tell everyone I knew about this. 
So you've been told!  | |
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03-02-07, 09:16 PM
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#6 (permalink)
| | 250+ Club
Join Date: Nov 2005 Location: Bishop, CA
Posts: 428
| I like it! I am currently reworking a manifold set and will give this a try.
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--- DAN ---
1978 FJ40
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03-02-07, 09:26 PM
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#7 (permalink)
| | Forum Lifer
Join Date: Jan 2003 Location: Kansastitty
Posts: 7,353
| Just one word about brass nuts....................do not over-torque them. 
Ed
__________________ My Anger-Management Class really pisses me off
'66FJ40, Fresh 2F, H42/Orion(By Poser... LCR4WD), ARB Front/rear(By Poser... LCR4WD), MetalTech Cage installed by Poser, Screw-ups fixed(by Poser) 4WDB Corvette Master, Mini Truck PS, 3.5" Lift, Warn 8274, 33s on stockers, WhiteKnuckle sliders | |
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03-02-07, 10:30 PM
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#8 (permalink)
| | 250+ Club
Join Date: Apr 2006
Posts: 718
| Quote:
Originally Posted by Coolerman Cons: You can't hang the manifold and intake from the studs while installing making it harder, If the bolt gets stuck in the head you more than likely will snap it off in the head. Studs allow you to use brass nuts, if the nut freezes to the stud you can easily just strip it off without harming the studs.
Pros: Bolts are cheaper otherwise I can't think of any... | I just installed my rams horns with Grade 8 bolts. It was a cake walk. In terms of removing the "studs" they're a PITA to remove. I had three studs on the bottom that were stuck in the RAMS. I tried to remove those faukers but they would not budge (heated with a torch).
I gave up and took them to the machine shop and it took them an hour to remove. I asked the machine shop guy (Edwards Engines) about bolts in the mainiafold and he said it would be okay as long as they are grade 8.---so I have bolts in my Rams horns. I hope there won't be problems.
__________________ Everyone is trying to accomplish something big, not realizing that life is made up of little things.  --Frank A. Clark | |
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03-02-07, 10:41 PM
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#9 (permalink)
| | I'm a zit. Get it?
Join Date: Jan 2007 Location: Wisconsin
Posts: 89
| Cool tip, haven't heard of that before. Are metric nuts easy to come by?
__________________
Jeff
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03-03-07, 04:04 AM
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#10 (permalink)
| | Forum Lifer
Join Date: Jan 2004 Location: Lexington, KY
Posts: 3,942
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Quote:
Originally Posted by Rocinante Cool tip, haven't heard of that before. Are metric nuts easy to come by? | Nah, easy to find, just castrate a few monkeys from Europe! | |
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03-03-07, 01:43 PM
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#11 (permalink)
| | I'm a zit. Get it?
Join Date: Jan 2007 Location: Wisconsin
Posts: 89
| Quote:
Originally Posted by Coolerman Nah, easy to find, just castrate a few monkeys from Europe! | I was waiting for some wise arse to say something 
__________________
Jeff
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03-04-07, 07:42 PM
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#12 (permalink)
| | Forum Lifer
Join Date: Jan 2004 Location: Lexington, KY
Posts: 3,942
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www.grainger.com Part #6CA95 10mm x 1.50 box 25 for $10.50 | |
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03-04-07, 09:49 PM
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#13 (permalink)
| | Site Addict
Join Date: Dec 2005
Posts: 1,676
| I've run studs and brass nuts on various exhaust manifolds. Also use spring lockwashers instead of split lockwashers, as they don't dig into the nut.
Sometimes brass lockwashers aren't the best, though. Some headers can require a fair amount of torque to properly seal, even with thicker "header" gaskets. You can strip out the brass nuts. In this case, I use regular nuts with anti-seize, and once a year remove each nut and retorque it to ensure it won't stick.
__________________ "A government big enough to give you everything you want is a government big enough to take from you everything you have."
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