Difference in ARP head studs
10-05-2006, 07:45 AM
#1
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Difference in ARP head studs ARP 4316s and 4317s..
Could i use the 4317's on a 6.0 block going in an F-body. I had a set of the 4316's inmy old motor and sold them. I see the 4317's say "same length" studs. I cant remember if the longer studs on my last set were the same length or not. Explain the difference to me and why or why not I shouldnt use them on this next buildup. TIA.
Could i use the 4317's on a 6.0 block going in an F-body. I had a set of the 4316's inmy old motor and sold them. I see the 4317's say "same length" studs. I cant remember if the longer studs on my last set were the same length or not. Explain the difference to me and why or why not I shouldnt use them on this next buildup. TIA.
10-05-2006, 02:02 PM
#2
there are two headbolt length specs.
the first one (97-04ish) used 3 headbolt sizes.. a small, a mid length, and a long.
the second one, (04ish to current) uses two sizes.. the same small one, and the midlength one. all of the long bolts have been replaced with the midlength ones.
a later, 2nd design block would use that "same length" kit.
the easiest way to test this looking at a block is to see where the threads start on the middle "long bolt" holes... if the threads are recessed, its ment for a longer bolt. if the threads are right near the surface of the deck, it is designed for the newer midlength (same length) design.
the first one (97-04ish) used 3 headbolt sizes.. a small, a mid length, and a long.
the second one, (04ish to current) uses two sizes.. the same small one, and the midlength one. all of the long bolts have been replaced with the midlength ones.
a later, 2nd design block would use that "same length" kit.
the easiest way to test this looking at a block is to see where the threads start on the middle "long bolt" holes... if the threads are recessed, its ment for a longer bolt. if the threads are right near the surface of the deck, it is designed for the newer midlength (same length) design.
