what is the thread pitch of our 84- early 85 headbolts?

[Xtrempickup]

Ive contacted arp to see if they have any 10mm head studs i could use in my early 85 2.2L. They responded with:


We will need dimensions from your block & head to see if we have something that will fit correctly. Here is a link to our online catalog, page 22. http://arpcatalog.com/files/assets/basic-html/index.html#22 We need the dimensions as indicated in the drawing at the top of the page. Please take dimensions from the block & head only - nothing from the bolts except the thread pitch & diameter. Send the info back to me

Anybody know this info?

[iTurbo]

I will take a die to the 10mm headbolts that I just removed and find out Tom, in case you don't get an answer by this evening. BTW, I got the DC intercooler kit yesterday, thanks!

[Xtrempickup]

I dont have a die set, i have very little tools to work with in terms of a tool box

[4 l-bodies]

Tom,
The expense of trying to buy 10mm studs, nuts, and washers, isn't worth it. Just buy a set of 10mm head bolts. They are dirt cheap if you search around a little. I'll bet I could buy 8-10 sets of bolts for what your gonna spend on one set of 10mm head stud kit. My 85 GLHT has lifted a head once in 27 years. To answer your question the 10mm bolt pitch for headbolts is 1.5mm, same as 11mm.
Todd

[Xtrempickup]

Thanks