The Project Pad

Looking at retorquing my ARP cylinder head bolts. Information about that is misleading. Some do, some don't.

Mine where torqued once at 80lbs/ft. Should I be concerned ?

da_trem wrote:Looking at retorquing my ARP cylinder head bolts. Information about that is misleading. Some do, some don't.

Mine where torqued once at 80lbs/ft. Should I be concerned ?

Which kit do you have? If undercut (ARP 204-4704) retorquing is not necessary as they are technically stretch studs, kind of like OEM. If non-undercut, then retorquing may be a necessity.

Undercut set. No retorque then.

Thanks a lot!
Dave

No personal experience here (my 3B is stock, head bolt-wise), but I remember someone posting about needing washers under the nut to help spread the load and avoid digging in to the head. I think it was chaloux who wrote about this.

it always good to check or re-torque any head studs undercut or not. I torque mine to 85 in steps. 50, 70, 85

bradyzq wrote:No personal experience here (my 3B is stock, head bolt-wise), but I remember someone posting about needing washers under the nut to help spread the load and avoid digging in to the head. I think it was chaloux who wrote about this.

The ARP kits come with washers. It's the used sets that dont

boost_addict wrote:it always good to check or re-torque any head studs undercut or not. I torque mine to 85 in steps. 50, 70, 85

x2

AngryTaco wrote:

bradyzq wrote:No personal experience here (my 3B is stock, head bolt-wise), but I remember someone posting about needing washers under the nut to help spread the load and avoid digging in to the head. I think it was chaloux who wrote about this.

The ARP kits come with washers. It's the used sets that dont

Yes, I am aware of that.

BIGGER washers needed to avoid cutting into the head by not distributing the load enough.

With the new torque spec after people lifted heads.

Oh well, i'll recheck these anyways since I'm in need of a new timing chain. Cams are already off. I'll come back to you with results as retorquing was necessary or not.

As for the supplied washers in the ARP kit, I not using these. I've ordered HD ones from Thuppu on S2 forum.

If anyone needs ARP head washers, just let me know.

Thuppu's HD head washers:

Did my timing chain last night. Rechecked torque of the head studs nuts. They were all within specs, the undercut set I have haven't loosened a bit.

Those washers are sexy. Also...I always retorque, undercut or not. 07k wont take the bigger washers because ARP made them proper the first time. ;-)