Heat cycle and retorque ARPs?
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Heat cycle and retorque ARPs?
I just finished installing my new heads with ARP bolts. My question is, do I need to heat cycle the car a few times then tear it down and retorque the head bolts, or will it be fine with out?
TIA, Aaron
TIA, Aaron
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Originally Posted by The Sad
I just finished installing my new heads with ARP bolts. My question is, do I need to heat cycle the car a few times then tear it down and retorque the head bolts, or will it be fine with out?
TIA, Aaron
TIA, Aaron
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I have studs and didnt bother retorquing after a heat cycle. I did however check the torque a few times when the engine was sitting on the stand over the span of a few days.
What I would do is torque them like 5 ft-lbs over, that way if they lose a little torque after heat cycle they will still be within tolerance. A little extra clamping force wont hurt anything anyway.
What I would do is torque them like 5 ft-lbs over, that way if they lose a little torque after heat cycle they will still be within tolerance. A little extra clamping force wont hurt anything anyway.
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I didnt re-torque with felpro 1041's and I wound up blowing gaskets. After installing ICE Titan gaskets the THIRD time, blew the second set too, I re-torqued twice. Both retorques moved the nuts about 1/8 of a turn tighter on ARP 12 point studs and nuts. I'd never skip a retorque no matter what again.
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Originally Posted by DAVESS02
I didnt re-torque with felpro 1041's and I wound up blowing gaskets. After installing ICE Titan gaskets the THIRD time, blew the second set too, I re-torqued twice. Both retorques moved the nuts about 1/8 of a turn tighter on ARP 12 point studs and nuts. I'd never skip a retorque no matter what again.
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Originally Posted by The Sad
FYI - I heat cycled and tore one valve cover off. I tried to retorque those, but 4 were at torque, and one barely moved. I assumed the rest were OK.
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Originally Posted by DAVESS02
I didnt re-torque with felpro 1041's and I wound up blowing gaskets. After installing ICE Titan gaskets the THIRD time, blew the second set too, I re-torqued twice. Both retorques moved the nuts about 1/8 of a turn tighter on ARP 12 point studs and nuts. I'd never skip a retorque no matter what again.
Run factory MLS gaskets and you'd be better off.