exhaust manifold bolts torque-to-yield?
03-31-2005, 01:47 PM
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exhaust manifold bolts torque-to-yield? title says it all, are the gm exhaust manifold bolts torque to yield?
I thought I read something about this but cant seem to find it anywhere.
If they arent, are the bottom of the bolts supposed to look like they're missing about 3-4 threads?
I thought I read something about this but cant seem to find it anywhere.
If they arent, are the bottom of the bolts supposed to look like they're missing about 3-4 threads?
04-01-2005, 07:45 AM
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Originally Posted by Steve Burger
I have reused them a number of times. I have never heard or read that they are TTY.
04-01-2005, 08:24 AM
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They are NOT torque to yield bolts! Don't even try this, you will tear the threads right out of your heads (steel = higher tensile strength than aluminum). The torque spec for them is 18 ft-lbs, as mentioned above.
04-01-2005, 09:45 AM
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I will agree..they are not TTY bolts. The only problem I see is a couple of ya'll are saying " don't do it..it's a steel bolt going into aluminum"...ummm what do you think the head bolts are and the block?lol
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04-02-2005, 12:27 AM
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Originally Posted by Unaffiliated Racing
I will agree..they are not TTY bolts. The only problem I see is a couple of ya'll are saying " don't do it..it's a steel bolt going into aluminum"...ummm what do you think the head bolts are and the block?lol
04-02-2005, 02:19 AM
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Good Lord, no they are NOT torque to yield! 
As mentioned above the torque is 18ft/lbs (It's actually 15-18ft/lbs). You will DEFINETLY jack up the thread pattern in the head by doing much more torque than this.
Schantin
2002 Camaro Z28 M6
As mentioned above the torque is 18ft/lbs (It's actually 15-18ft/lbs). You will DEFINETLY jack up the thread pattern in the head by doing much more torque than this.Schantin
2002 Camaro Z28 M6
