ARP Head Stud Tork?

[Bad Vibe]

I know it has been asked but I can't find it. What is the standard way to tork down ARP head studs? What is the final tork lb amount?

[igotaneed4speed]

70 lbs if i remeber rt same pattern as chryslers i think its tourqe to 45 then 45 agian then 70... thats how i do mine and then start it let i warm up fully and then cool off and re-tourqe and then agian after a few hundered miles....

[kedavis]

Most guys torque to around 87 ft lbs make sure you pre stretch the studs which means torque 4 to 5 times and loosen.Otherwise you may have head floating problems after they are stretched they will quit snapping while torqueing.

[Bad Vibe]

Thank you.

[Geoff]

so is it just 87, or is it like the stock ones where you go to 65, then 1/4 turn?

[kedavis]

Quote:

Originally Posted by Geoff so is it just 87, or is it like the stock ones where you go to 65, then 1/4 turn?

Yea you can do it in a sequence of three.

[iniviate]

i thought since the stock bolts were torque to yeild that the 1/4 turn was to stretch them?

wouldnt that mean this doesnt apply to the ARP's? i can't imagine the ARP's stretching if you can reuse them. seems like they would be no good pretty quickly if they stretched like a stock bolt.

[CSXT404]

Direct from ARP

Here are the correct Torque Specs for ARP Head Bolts too.

Torque for M11 bolts using ARP Moly Lube is 75 ft/lbs.
Torque for M11 bolts using 30wt engine oil is 90 ft/lbs.

Torque for M11 studs using ARP Moly Lube is 70 ft/lbs.
Torque for M11 studs using 30wt engine oil is 85 ft/lbs

[mopar2ya]

On aluminum heads ARP said 65 with moly lube.

[kedavis]

Quote:

Originally Posted by iniviate i thought since the stock bolts were torque to yeild that the 1/4 turn was to stretch them? wouldnt that mean this doesnt apply to the ARP's? i can't imagine the ARP's stretching if you can reuse them. seems like they would be no good pretty quickly if they stretched like a stock bolt.

I talked to tech at arp when I had a head floating problem when they are new they need to be torqued 5 times to pre stretch before final torque after that it doesnt need to be done again.

[turbovanman]

Quote:

Originally Posted by Geoff so is it just 87, or is it like the stock ones where you go to 65, then 1/4 turn?

No, they are not like the stock head bolts, they are not torque to yield.

The instructions I got with mine are

ARP lube, aluminum head 65ft/lbs
ARP lube, cast head, 70ft/lbs
30Wt oil, cast head, 85ft/lbs

So I guess do the math for 30wt oil with alumumium head. They don't list that reading. For the price of a tube of ARP lube, not worth using oil, and your guaranteed a proper reading and no stiction on the bolt head and washer.

Note, I run mine at 70 ft/lbs at 29 psi and zero issues with a MP gasket. I saw on here, some guys are cranking the torque up to 80 or even 90 ft/lbs on high HP engines.