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CC Advertisers
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05-11-2009, 11:05 AM
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CC Member
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Join Date: Dec 2002
Location: caledonia,
il
Cobra Make, Engine: #1459 w/460(sold)New(used),spf w/427s.o.(sold)
Posts: 578
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Not Ranked
exhaust bolt torque
Installing my new ss exhaust. What should the 5/16 grade 8 bolts be torqued to ?(pipe to header).
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05-11-2009, 11:10 AM
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CC Member
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Join Date: Nov 2007
Cobra Make, Engine: KMP532, KC427FE, TWM
Posts: 310
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Not Ranked
I have never torqued header bolts, I have no idea how I'd get to many of them with a torque wrench.
In any case for the first XXX? miles they seem to loosen pretty consistently. I would just suggest checking them every 100 miles and snugging them up until the are no longer getting lose.. Tighten them while warm if possible. Make sure you use antiseize on the bolts.
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05-11-2009, 04:31 PM
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CC Member
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Join Date: Mar 2007
Location: Creedmoor,
TX
Cobra Make, Engine: FFR3542K, 347 C. I., EFI, T-5, Miata Front Sway Bar, 3 Link, Red with White Stripes
Posts: 1,163
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Not Ranked
I can't get anything but a box end wrench on most of my header bolts. I get as much torque on the bolts as I can. Then check them after a couple of heat cycles. If loose check again until they stay torqued.
__________________
Steve
Texas Cobra Club-Austin
July 2009 FFCars Picture of the Month
FFR3542K, 347, Holley Sniper EFI, T-5, 4 Wheel Discs, 3-Link, Miata Front Sway Bar, Red with White Stripes
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05-11-2009, 04:44 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
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05-11-2009, 05:31 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
If they are in aluminum heads only tighten them when they are cold. Don't over do it.
I should have read closer sorry........
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 05-12-2009 at 08:58 AM..
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05-11-2009, 06:12 PM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
You need to "spot" torque them. First, put a wrench on the bolt. Then, pull as hard as you can until you see spots. You're done.
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05-12-2009, 08:35 AM
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CC Member
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Join Date: Jun 2005
Location: Fairfield,
ca
Cobra Make, Engine: CRII with a Stroked Windsor
Posts: 976
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Not Ranked
Isn't the question on the bolts that hold the headers to the exhaust pipes and not the headers to the heads?
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05-12-2009, 01:19 PM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
Yes. That's the way it reads.
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05-12-2009, 02:48 PM
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CC Member
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Join Date: Dec 2002
Location: caledonia,
il
Cobra Make, Engine: #1459 w/460(sold)New(used),spf w/427s.o.(sold)
Posts: 578
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Not Ranked
Thanks, Did the spot trq........
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05-12-2009, 04:36 PM
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CC Member
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Join Date: May 2001
Posts: 1,330
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Not Ranked
Is that your "sleeper" sparks?
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