ARP head studs cracked the block

[z32boy]

Has anyone had this happen when torqueing the head?

[brndck]

pix plz.

you didn't follow the torquing procedure, did you?

unless there was a large amount of foreign material inside the threaded hole, i can't imagine why it would crack (assuming that you are using the correct size studs, of course)

[wangan_cruiser]

Like he said

[boyou2]

did you clean well bolt's hole?

[s13livin]

pix plz.

you didn't follow the torquing procedure, did you?


this could be your cause did you follow them.. as in tightening them in steps, and following the sequence?

[z32boy]

I had a mechanic doing the work so I don't know.

[jr_ss]

Sounds like you have an issue on your hands... It'll be difficult to prove that he followed te recommended procedure. I've seen people break the studs before cracking the block.

[fullthrottle]

What kind of.motor? Sr20s will strip the aluminum block before breaking and iron blocks I would think would break the studs lol.

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[slider2828]

I checked both procedures yesterday on arp's website....

ARP 2000 is at 90 ft/lb with their ultra slick assembly lube
and their older material is 80 ft/lb..... so not sure where 105 came from... You can type in your kit and get the instructions on their website.

[mr_eh]

I'd ask the mechanic to tell you how he put the studs in / what he torqued it to... then find out the correct specs

also fwiw I know some of the arp studs were the wrong length for sr20s if they were earlier model ones