Which ARP head bolts do i get ?

[BZY247]

Hey guys,

Trying to buy some ARP head bolts and theres three part numbers listed:


ARP 207-4701
ARP 207-4203
ARP 207-4702

My motor is a 91 VR4 6bolt 4G63T .... how do i know if i need 11mm or 12mm etc..

 

[4piknup]

If you have 6 bolt block and head you need the 12mm bolts. if you have a evo head on a 6 bolt block you still need 12mm bolts, but you need to reams the head holes or you will get no oil to the cams .
Another 6bolt bit of goodness.
I ddint look at part nos. so not sure if there is 2x 11mm or 2x 12mm.

 

[doo doo]

ARP 207-4201 is the part no for 12mm head studs for 6 bolt VR4 engine.

 

[EVO-00X]

You know, there is an ARP part number tech sticky in this section if you looked lol: http://www.4gtuner.com/topic/8102-arp-parts-install-procedure-for-evo-i-iii-vr4/
I didnt put that together for nothing

 

[86psi]

Does anyone know the differance with the l19 studs and the ca-625 studs

 

[doo doo]

Basically, look here.

http://arp-bolts.com/pages/technical_metallurgy.shtml

BTW If you're using either of them for rods (as an upgrade over ARP 2000 series) then you need to have the mains re-sized as the extra torque available can pull the round out of shape.

 

[BZY247]

All sorted thanks guys