arp head stud kit / cometic vs durapro

zippo · Post by **zippo** » Thu Jan 03, 2008 2:51 pm

any one have the part number for the sohc ??

also do cometic make a gasket for the sohc , if so what is the part number .

i have seen a gemini use a durapro graphite gasket and pump 35psi into it no probs , using a head stud kit .

feed back on both would be much appreciated from end users .
cheers

coop1er · Post by **coop1er** » Thu Jan 03, 2008 3:30 pm

There is no such thing as an ARP 4g63 sohc head stud kit. There may be
other stud kits that would work but good luck finding out which one. 4g63
dohc studs are to short to use. I have heard of Ford Cosworth/Sierra
head studs being used as they are the right length but you must helicoil
the block first to change to the new thread. ARP have never bothered to
help me any when I have emailed them.

Cometic dont make a gasket for the sohc but you may use one for the
dohc as they are basically the same. You have to get the right size though.

Sorry I dont know anything about durapro gaskets.

airbats801 · Post by **airbats801** » Thu Jan 03, 2008 4:07 pm

what about g54b head studs? I know dohc headbolts are the same threadpuitch and what not, but g54b are a bit longer. Might be worth looking into. I could probably measure a arp g54b stud out and let you guys know how long it is.

Sigma_turbzz · Post by **Sigma_turbzz** » Fri Jan 04, 2008 12:23 pm

Yes that's an old trade secret :) The g54b head bolts are exactly the same as g63b

zippo · Post by **zippo** » Fri Jan 04, 2008 1:01 pm

so basicly , the t/cam head gasket is the same and will work .
the 4g54 studs are the same length and same thread so wil be fine .

has any one used these and can verify for fact ???

Starion_Turbo · Post by **Starion_Turbo** » Fri Jan 04, 2008 3:50 pm

Twin cam head gasket should be wider with extra oil gallery holes I think

redzone · Post by **redzone** » Fri Jan 04, 2008 8:32 pm

^^^ only the late type gen 2 one is. if u stick with galant VR4/1 gen DSM stuff u will be fine..

airbats801 · Post by **airbats801** » Fri Jan 04, 2008 9:03 pm

I'll measure one tomorrow. If the bolts are the same they will work though.

igottasicjb · Post by **igottasicjb** » Fri Jan 04, 2008 10:24 pm

twin cam one are actually too long when my workshop tried using them, so he went for the g54b ones instead. you can use vr4 one so long as you use a 10mm spacer made from stainless and i think they need to be 32mm in dia, use these on top of the studs after the head goes on.

here's my engine before assembly

arp studs with an oring'd head and block and a copper head gasket were used. This should hold 30 psi of boost no probs.

Sigma_turbzz · Post by **Sigma_turbzz** » Sun Jan 06, 2008 9:01 am

Twin cam ones would actually be too short ive verified this personally

coop1er · Post by **coop1er** » Sun Jan 06, 2008 6:43 pm

Yes the dohc head studs are too short. It is good to know that the 4g54 head studs fit though.
I wasnt actually aware that they made them.

zippo · Post by **zippo** » Mon Jan 07, 2008 7:35 pm

thanks heaps to all....................

4g54 are the go ......... :D

flav · Post by **flav** » Tue Jan 08, 2008 12:27 am

I have a cometic in stock you can play with and see if it fits up.

zippo · Post by **zippo** » Fri Jan 11, 2008 6:23 pm

i have finaly found out that the 4g54 studs made by arp will fit , but are slightly longer and will req machining down a tad .

would any know if the 4g64 studs are the same as the 4g63 single cam studs ?????

Austarion

arp head stud kit / cometic vs durapro

arp head stud kit / cometic vs durapro

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