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head bolt thread size
Posted: Tue Oct 13, 2015 1:37 am
by njord
Does anybody know the thread size oh the head bolts as finding conflicting info
It's either m12 x 1.25 or m12 x 1.25 as arp studs are tight going in so want to clean threads
Posted: Tue Oct 13, 2015 7:57 am
by 4thgenphil
Have u put the grease on them?
Posted: Tue Oct 13, 2015 9:29 am
by farlow
njord wrote:Does anybody know the thread size oh the head bolts as finding conflicting info
It's either m12 x 1.25 or m12 x 1.25 as arp studs are tight going in so want to clean threads
Based on that info I'd go with m12 x 1.25
Posted: Tue Oct 13, 2015 10:02 am
by Drax
farlow wrote:njord wrote:Does anybody know the thread size oh the head bolts as finding conflicting info
It's either m12 x 1.25 or m12 x 1.25 as arp studs are tight going in so want to clean threads
Based on that info I'd go with m12 x 1.25
I noticed that too.
@njord I can check tonight if you like? I have lots of spare head studs at home
Posted: Wed Oct 14, 2015 10:28 am
by Drax
@njord took this pic this morning
one is the head bolt and one is the main stud bolt methinks, but both were 10mm diameter threads.
Posted: Wed Oct 14, 2015 10:12 pm
by njord
I managed to get a bolt and it is definitely m12 x 1.25
There was quiet abit of swarf down there. Guess the machine shop didnt do quite a good enough job