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11-27-2008, 01:24 PM
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#1 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Exhaust Manifold Bolt Sizes
I have some Ram Horn Exhaust manifolds that I dropped off to get coated and was wanting to coat the bolts too. What sizes are they??
__________________
Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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11-27-2008, 03:04 PM
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#2 |
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Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Exhaust Manifold Bolt Sizes
9/16" x 2.1/2" outers
9/16" x 3" inners I don't swear they are correct for all heads |
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11-28-2008, 11:58 AM
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#3 | |
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Registered User
Join Date: Oct 2004
Location: Sonoma, CA
Posts: 319
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Re: Exhaust Manifold Bolt Sizes
Quote:
actual bolt thread size is 3/8"-16, bolt head size is 9/16" |
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11-28-2008, 12:07 PM
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#4 | |
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Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Exhaust Manifold Bolt Sizes
Quote:
 thanks for the correction |
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11-27-2008, 03:11 PM
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#5 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Re: Exhaust Manifold Bolt Sizes
Guess I should have said, sorry, they are stock 882 heads.
__________________
Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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11-27-2008, 04:01 PM
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#6 |
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Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Exhaust Manifold Bolt Sizes
They should fit without any options/brackets bolted to them.
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11-27-2008, 04:21 PM
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#7 |
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Old Skool Club
 
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Exhaust Manifold Bolt Sizes
Lets's see'um after you get 'em back....now that my engine is out, and a friend gave me three sets of ram's horn manifolds (and two other set...Thanks, Mike), I'm thinking I might not want to reinstall the Hooker headers that came off of the engine.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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11-27-2008, 03:32 PM
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#8 |
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Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: Exhaust Manifold Bolt Sizes
You'll need 8 thick washers for the outer 4 bolts, the inner doesn't use washers.
If you are going to use the locks then you should coat them too. s/t
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. 
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11-27-2008, 04:24 PM
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#9 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Re: Exhaust Manifold Bolt Sizes
No brackets, I'm running a serpentine setup
__________________
Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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11-28-2008, 11:47 AM
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#10 |
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Senior Member
Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,704
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Re: Exhaust Manifold Bolt Sizes
Got new ones for mine at Corvette America, not sure if all bolts are created equal when it comes to exhaust manifold bolts. Thought I read on here that they are special in some way
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 11-28-2008 at 11:54 AM. |
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11-28-2008, 03:54 PM
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#11 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Re: Exhaust Manifold Bolt Sizes
That's the only thing I WAS sure of
__________________
Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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12-18-2008, 04:10 AM
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#12 |
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Registered User
Join Date: Sep 2008
Location: Tempe, AZ
Posts: 770
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Re: Exhaust Manifold Bolt Sizes
Actually....those are not the correct lengths for my stock 350....I just went through this...I initially used the 2.5" & 3" lengths, but I wound up bottoming out in several of the holes before they tightened....
I then ordered a correct kit from one of our site vendors and they came in 8 ea. @ 2.25" & 4 ea. @ 2.75" (centers).....they were perfect! It's my understanding that you do not ever want to bottom out like that as you can cause major damage... Dan
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My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=309288 Last edited by Rack Man; 12-18-2008 at 04:14 AM. |
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12-18-2008, 06:39 AM
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#13 |
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Registered User
Join Date: Mar 2005
Location: Fairfield Maine
Posts: 1,759
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Re: Exhaust Manifold Bolt Sizes
What is the grade # of the bolts?
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12-19-2008, 07:15 PM
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#14 | |
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Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Exhaust Manifold Bolt Sizes
Quote:
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