head stud TQ specs?
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Well ARP says 65 on all the 15mm and 27 on all the 10mm, but I usually go 80 on the 15 and 30 on the 10 mm though just what I do I have never had a real problem with it due to either the TQ spec or gaskets. Some others will chime in on there procedure though. I go up in 10 lb increments after 50 or so. I let them sit over night and re check them etc...
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I would not go much beyond what ARP recommends for tightening specs. They are a high quality fastener and I think ARP would give torque specs that are approaching yield. If you have a good torque wrench I might bump it up 5-10 ft lbs. Otherwise let her be.
I do think for FI it would be wise to re-torque the head bolts are a heat cycle as ARP recommends. This should help counter the setting that will take place.
I do think for FI it would be wise to re-torque the head bolts are a heat cycle as ARP recommends. This should help counter the setting that will take place.
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Originally Posted by Country Boy
On the TQ paper they said that the TQ spec is usually 75% of the fasteners yeild.