ARP headstud problem
 

does anyone know what size the arp nuts are for b16? i tried all kinds of sockets and none fit the nuts. the 14mm is the closest but on the first torque setting the socket got wedged on the nut, so i know at 70ft.lbs they will strip. the studs are new also. my only thought is that i had a 12pt socket on a 6pt nut. i am going to go check that soon

Re: ARP headstud problem
 

for my ls it was 14mm 12pt....have you tried standard 12pt, my rod caps were standard and my head studs were metric :S

Re: ARP headstud problem
 

the nuts are 6pt. i tried 13mm 14mm 1/2" 9/16" 2 were too big and 2 were too small

Re: ARP headstud problem
 

there are standard sizes in between those. Try going to sears or harbor frieght with the nut

Re: ARP headstud problem
 

i looked down inthe head and it is a 12pt nut. i used a 13mm 12pt socket and all is good

Re: ARP headstud problem
 

All the ARP 7/16" hardware I've ever used has 13mm 12pt nuts.