Final Headbolt Torque spec???

[KenC]

M42 headbolts are 22lb/ft then 90deg and another 90deg. Does anybody know what the final torque spec is?

[dude8383]

There is no torque spec, you need to be using a torque angle gauge/meter

http://www.etoolcart.com/torqueanglemeterotc4554.aspx

[KenC]

I guess I probably needed to explain more. I've developed an oil leak right by an oil passage/head bolt. I wanted to check to make sure they're still torqued down to spec. They were torqued properly during install (~10k ago).

[Dj Buttchug]

^ what gasket are you using?

[KenC]

Stock HG

I bought a new set of headbolts. Going to replace all of them soon.

[Dj Buttchug]

This is weird. I had this problem... now others as well... wtf

[KenC]

This is weird. I had this problem... now others as well... wtf

"Others" as in the other headbolts? I've never had this issue.

[Van Westervelt]

I dont think you measure it by force (ft lbs per inch etc) once you pass the given spec of 22 ft lbs. Its my linear measurement after that I thought, hence the 90*, 90*. No?

[Dj Buttchug]

"Others" as in the other headbolts? I've never had this issue.

the fact that you've developed an oil leak from your hg.

[e304me]

I think I remember it going up to around 70-80 ft lbs, but dont count on that number for anything by any means. if you have an electronic torque wrench it will be easy to check, if not you have to do trial and eroor to see what yours are at

[Simon S]

^ that sounds like the right neighborhood..

I'm noting 90ftlbs final with arp's - but those are for studs (not bolts)

[Dj Buttchug]

i went 30lbs
rest 15 min
60lbs
final 70lbs

[Simon S]

Here's a link to arp's instructions:

http://arpinstructions.com/instructions/201-4601.pdf

Chugz - did you run studs or bolts?

[Dj Buttchug]

Here's a link to arp's instructions:

http://arpinstructions.com/instructions/201-4601.pdf

Chugz - did you run studs or bolts?

studs all the way