exhaust manifold bolts torque-to-yield?
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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?
Originally Posted by Steve Burger
I have reused them a number of times. I have never heard or read that they are TTY.
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.
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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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
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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
