ARP head studs, what torque to do the nuts to?

[Paul_13]

As title says, what torque do I do the ARP nuts to?

Also what socket do I need for the nuts? It's not an 'E' socket.

Thanks
Paul

[Anton]

T55 or T65 rings a bell. 100 lbft

[Jimbo]

Its a 12point socket i.believe

[Tom]

I think people have said just standard factory torque settings. Should say in your headgasket box/wrapper/thingy.

[Paul_13]

might go a bit tighter than standard figures haha

What size 12 point socket? anybody know?

[Chris_90]

Zx_volcano told me 100ftlbs and as said it's a 12point socket no idea on size tho would like to no my self so I got one ready

[Tom]

Im confused, Surely you just try the nut in a socket and if it fits use that one?

[padge]

molegrips? hammer and chisel?

[Ruan]

17mm/19mm 12 sided socket isn't it?!

ARPs website tells you as long as you know the size, tensile strength and thread pitch...

Ignore the green, that's not me...

[Dave]

I think people have said just standard factory torque settings. Should say in your headgasket box/wrapper/thingy.

Do NOT do these so factory settings, they don't stretch so you will ruin them. I'm sure they are either 95ftlb or 100ftlb when I did mine, zx volcane will be along shortly to clarify I'm sure.

[Tom]

Heh well there you go kids, dont do everything you read on the internet!

[silverzx]

So is it 17 or 19mm..?

[zx_volcane]

Off the top of my head i think its a 16mm 12 sided socket

If you've got a 3/8" set, just try a few multipoints on till you get the right one

ARP recommended torque is 100 ft/lbs

Do them up in 3 stages, ie all to 33, then all to 66 the finally all to 100

Follow standard bolt pattern for tightening sequence

Probably a good idea to check the torque after a couple of heat cycles too.


Always use the arp fastener lube, and clean the threads out in the block with a tap

Heh well there you go kids, dont do everything you read on the internet!

Too right