ARP HEADSTUDS

[b12rlw]

Hi folks, noticed something a little odd yesterday when bolting my head down yesterday. It looked like the stud was twisting as I applied torque to the nut. I'm thinking that as the stud is fully engaged into the head, the nut is bottoming on the top thread without actually clamping the head down. I'm sure I've read somewhere before about people turning 5mm off the bottom thread to stop this happening. Anyone seen this or can verify the machining option??

[ross2009]

are you sure the bottom of the hole is clean with no crap in it did you use the allen key to wind them in the block ?
what washers did you use ?

[sag]

are you sure the bottom of the hole is clean with no crap in it did you use the allen key to wind them in the block ?
what washers did you use ?

+1 you have to make sure the threads are clean
Also have you applied to lubricant which came with th ARP studs

[b12rlw]

Been lubed, threads cleaned and debris removed from the holes and studs just nipped with a 1/4" ratchet . I didn't get washers with the studs. I did think about adding some. I'm thinking Maybe this is part of the reason the gasket failed?

[ross2009]

you need washers that will be the reason or just use your original bmw washers

[b12rlw]

Washers were missing from the std bolts. Ive robbed them from my spare engine and all is well. Gutted i forked a gasket because of this but glad in a way as my head has now been welded. Cheers for the help!!!

[driftwood]

Welded? Have you had the water galleries welded like some people do when they fit a turbo?

[b12rlw]

yeah mate, should have detailed that. pics on my build thread.