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Old Apr 19, 2014 | 11:40 AM
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Default Headers bolts
My headers are leaking at four different places on both banks,I have new OEM gaskets and bolts.My question is: Is it recommended to put threadlocked or anti-seize on the bots? Thanks....
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Old Apr 19, 2014 | 11:57 AM
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Either those gaskets are no good or the header flange must not be straight...
Definitely not thread locker!! a lil anti seize would be ok, but wont prevent it from backing out
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Old Apr 19, 2014 | 12:01 PM
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change the gaskets, and check it up I haven't use any other gaskets always the OEM.
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Old Apr 19, 2014 | 12:14 PM
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Originally Posted by CDaniel525
Either those gaskets are no good or the header flange must not be straight...
Definitely not thread locker!! a lil anti seize would be ok, but wont prevent it from backing out
The shop that installed the headers used the original OEM gaskets & bolts It's a (08) The headers are Ar's.I hope it is the gaskets,I'm not sure if the Ar's have a warranty?.........
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Old Apr 19, 2014 | 12:25 PM
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What brand of headers?

I have B&B Headers, 7 years, stock gasket, no leaks. I used ARP studs.
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Old Apr 19, 2014 | 01:02 PM
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Originally Posted by timd38
What brand of headers?

I have B&B Headers, 7 years, stock gasket, no leaks. I used ARP studs.
Ar's..( American Racing Long Tubes)..
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Old Apr 19, 2014 | 01:11 PM
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I'm running AR Headers and have seen no leaks. When I installed them I used new GM gaskets and ARP studs. If your installer used the old gaskets, that's probably your problem. I doubt that the AR flanges aren't true or warped.
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Old Apr 19, 2014 | 01:17 PM
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AR is a good product. Since you have to take all the bolts out to replace the gasket, I would put a straight edge on the flange to see if it is flat.
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Old Apr 19, 2014 | 01:32 PM
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Originally Posted by SUB VETTE
I'm running AR Headers and have seen no leaks. When I installed them I used new GM gaskets and ARP studs. If your installer used the old gaskets, that's probably your problem. I doubt that the AR flanges aren't true or warped.
Yes, they did used the old gaskets & bolts....
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Old Apr 19, 2014 | 01:33 PM
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Originally Posted by timd38
AR is a good product. Since you have to take all the bolts out to replace the gasket, I would put a straight edge on the flange to see if it is flat.
Thanks.Good ideal..
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Old Apr 19, 2014 | 01:41 PM
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I called American racing & Steve said to put new OEM gaskets & new OEM bolts.I got my order from gmpartshouse & I was checking out the new bolts & they are 1/2" head?? They should be 13mm..Got me thinking about why GM would use American standard..
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Old Apr 20, 2014 | 10:35 AM
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Originally Posted by Cherokee Nation
I called American racing & Steve said to put new OEM gaskets & new OEM bolts.I got my order from gmpartshouse & I was checking out the new bolts & they are 1/2" head?? They should be 13mm..Got me thinking about why GM would use American standard..
Not sure.... but do let us know if that fixed the issue?
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Old Apr 20, 2014 | 11:59 AM
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1/2" = 12.7 mm, you may tell the difference with a new wrench but not much.
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Old Apr 20, 2014 | 03:26 PM
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Originally Posted by BearZ06
1/2" = 12.7 mm, you may tell the difference with a new wrench but not much.
The bolts are used on many other GM car also.The part # for the bolts I got from gmpartshouse is..11518860.I called a dealer & they gave me a different part #..11519840.???
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Old Apr 20, 2014 | 07:53 PM
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So you you mean standard thread vs. metric, sorry I wasn't thinking about the threads---a huge differenced there!
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