inovative91

d16y8 head studs, need to know do i tourque them to the block or just tighten them firm and torque the nut on top of the stud? and what ft lb also.

thanks in advance!

yoffer

You thread the studs into the block using your hands, then put the head onto the block and torque them down using these specs.
Cylinder Heads...All D ARP Studs
Step 1......15ft lbs
Step 2......30ft lbs
Step 3......62ft lbs
After you run the car around the block a couple of times until the car heats up completely, losen the nuts and retorque them about 4-5 times over.

inovative91

why do u torque them 4 or 5 times more..wouldnt that stress the threads?

Probot

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by inovative91 &raquo;</TD></TR><TR><TD CLASS="quote">why do u torque them 4 or 5 times more..wouldnt that stress the threads?</TD></TR></TABLE>

the initial torquing is to tighten everything down, after you drive the car it will see if their is any play left in the studs, so the final torquing is to set them in place for good.

yoffer

No, after you run the car until it gets completely warmed up, you losen the nut and retorque them, you do that about 5 times.

Straight off the ARP website:
3. Do the head studs only go in hand tight?

The studs should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. An undercut shorter stud will have a rate similar to a longer, standard shank stud. This provides a more even clamping force on the head. Because the head gasket will compress upon initial torquing, make sure studs (or bolts) are re-torqued after the engine has been run.

inovative91

thanks alot you guys kick a$$!!

inovative91

one more question, should i allow the engine to cool before re torqing or should i do it while its warm?

yoffer

I would think that i would let it cool.