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View Full Version : Torque Specs for SR ARP Rod Bolts



Big_Bronze_Rim
02-12-2006, 09:42 PM
I am in the process of rebuilding my sr and I plan on installing rods/pistons tomorrow. However, I seem to have misplaced the spec sheet that came with my ARP rod bolts and I need the proper torque specs(I can always call ARP though). If someone could provied my with the right torque value I would greatly appriciate it.

hybridynamics
02-12-2006, 11:38 PM
just got done assembling one with ARP rod bolts. it's 40 ft-lbs

champa
02-13-2006, 12:15 AM
the spec sheet says you need to stretch the bolts.

1. torque to 40ft-lbs, loosen completely
2. torque to 40ft-lbs again, loosen completely
3. third and final torque to 40ft-lbs

Big_Bronze_Rim
02-13-2006, 12:24 AM
Thanks guys!

Brad
02-13-2006, 12:50 PM
doesnt scott/enthalpy swear by something higher? or some other reputable builder on here. something like 75 or so

edit: doh i might be thinking of head studs

champa
02-13-2006, 01:48 PM
we're talking about rod bolts, loser!

killjoy
02-13-2006, 01:59 PM
doesnt scott/enthalpy swear by something higher? or some other reputable builder on here. something like 75 or so

edit: doh i might be thinking of head studs



Others have recommended 80 on head studs.

kab_47
02-13-2006, 02:54 PM
i put my head on this weekend, i did 40 lbs, then 70 lbs, loosen them all up, 40 lbs again, then a 90 degree turn on all of them, then another one. my motor runs fine, no leaks

champa
02-13-2006, 03:43 PM
that's the wrong way to do it with arp bolts.

killjoy
02-13-2006, 04:08 PM
that's the wrong way to do it with arp bolts.



yeah i agree. I just followed the instructions on the box. ARP are hardened so I don't believe you are supposed to stretch them, it just weakens them, but this is an old subject/argument.

Big_Bronze_Rim
02-14-2006, 12:52 AM
the spec sheet says you need to stretch the bolts.

1. torque to 40ft-lbs, loosen completely
2. torque to 40ft-lbs again, loosen completely
3. third and final torque to 40ft-lbs


I found the sheet today while cleaning my bench and this is right on the money.



i put my head on this weekend, i did 40 lbs, then 70 lbs, loosen them all up, 40 lbs again, then a 90 degree turn on all of them, then another one. my motor runs fine, no leaks


As to ARP head studs, that definitely isnt the recommended procedure. I will be torquing to 75-80 lb-ft in three steps as per Enthalpy's recommendation with a retorque at ~1000 miles.

champa
02-14-2006, 08:57 AM
when you say "retorque" you mean to check them without loosening the bolts, correct?

Big_Bronze_Rim
02-14-2006, 12:53 PM
when you say "retorque" you mean to check them without loosening the bolts, correct?


Correct, just reclick to 75-80 lb-ft.