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Old 10-01-2009, 08:33 AM   #1
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Default Head Bolt/Stud Length and Thread

Hey guys, kind of an oddball question from mazdatruckin.com we are trying to find a cheap alternative to spending $300 for a custom set of head / main studs, closest thing we can think of which might work is for the Miatas. If anyone can post specs on the bolts or ARP studs for either the cylinder head or main caps we would be grateful. Important dimensions are thread size, pitch, and length going into the block and overall length, for bolts this needs to be without the head thickness of coarse.

I did some searching and found a few minor specs but nothing that ruled out their use in the F2 engine.

Thanks,
K6

Last edited by Kyrasis6; 10-01-2009 at 08:34 AM. Reason: fixed typos, removed parsing from URL
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Old 10-01-2009, 10:16 AM   #2
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Man, I wish I were at home right now. I've got two full sets of both stock and ARP head & mains sitting there...

The only thing I can say off-hand is that the head bolts are a rather unusual thread; M11 x 1.5, if I recall correctly. Can't answer for length on them. I tried fitting a 7/16" nut onto one of 'em while building up a leakdown-test plate, and it almost fit, but not quite.

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Old 10-01-2009, 10:35 AM   #3
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Quote:
Originally Posted by Kyrasis6 View Post
Hey guys, kind of an oddball question from mazdatruckin.com we are trying to find a cheap alternative to spending $300 for a custom set of head / main studs, closest thing we can think of which might work is for the Miatas. If anyone can post specs on the bolts or ARP studs for either the cylinder head or main caps we would be grateful. Important dimensions are thread size, pitch, and length going into the block and overall length, for bolts this needs to be without the head thickness of coarse.

I did some searching and found a few minor specs but nothing that ruled out their use in the F2 engine.

Thanks,
K6

arent there motors in the ford line that might be similar?
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f2 engine studs, head studs, main studs, miata stud length, stud pitch

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