I'm gonna do my HG again and I used arp studs the last time do I have to buy new ones or are they still good? only used about 500 miles
Are ARP studs reusable???
- Thread starter DGmk3
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Take a look at this:
http://www.arp-bolts.com/Tech/TechInstall.html
Suprarich gave you good advise...you want to measure the length of the stud to insure it was not over torqued.
According to Cometic, the only time you have to re-torque once the MHG is installed is if you are using hardware that has not been heat cycles. Used ARP studs have been heat cycled...that's one of the good things about reusing them
http://www.arp-bolts.com/Tech/TechInstall.html
Suprarich gave you good advise...you want to measure the length of the stud to insure it was not over torqued.
According to Cometic, the only time you have to re-torque once the MHG is installed is if you are using hardware that has not been heat cycles. Used ARP studs have been heat cycled...that's one of the good things about reusing them
studs shouldnt stretch beyond use. BOLTS yes... but unless the studs were SERIOUSLY overtorqued...even in which case the aluminum head would more then like be destroyed FIRST...the studs themselves dont OVER stretch to the point of nonuse.
also the studs do NOT need to be retorqued. again that applies to the bolts.
these are two reasons i always recommend studs over the bolts.
also the studs do NOT need to be retorqued. again that applies to the bolts.
these are two reasons i always recommend studs over the bolts.
ARP told me if the studs were ok to reuse as long as they were not torqued more then 95-100ft/lbs (with moly lube) previously. The studs can handle 15-20ft/lbs then their 80ft/lbs recommendation, not that you should to do that.
75% yield strength on the studs is 70ft.lbs according to the instructions. Go above that and you do run the risk of stretching them.
RacerXJ220 said:
Actually the instructions say 81 ft/lbs (w/ moly) is the recommended torque and that value is at 75% of yield strength. Doing the math, that makes the yield strength of the studs at 107 ft/lbs of torque.