08VRZ06

Does anyone have the torque pattern for the LS7 head bolts? The ARP head stud kit came with the torque specs for the nuts but not the sequence.

Thanks

Mark

eboggs_jkvl

http://www.ls2.com/boggs/torques/headpnt.jpg

Ignore the torque numbers, I believe that is for the LS1 but the LS7 torque pattern is the same as the LS1.

The LS7 M11 (1-10) 22 lb ft first pass
M11 (1-10) 90 degrees second pass
M11 (1-10) 70 degrees final pass
M8 (11-15) 22 lb ft.

Elmer

BEZ06

I pretty much agree with Elmer.

Below is a picture from the 2010 Service Manual and is from the LS7 section about installing the heads (all the C6 engines use the same pattern):




In Elmer's link the 3rd pass is different from my 2010 SM.

In my manual all bolts are tightened 70 degrees in the 3rd pass, as Elmer mentions in his info.

Bob

08VRZ06

Thanks Elmer and Bob!! This is what I needed was the picture. The ARP Head studs all use a torque for the nuts and do not use degrees but they didn't include a picture for the sequence!!

Mark

jimbob8915

Is there an actual NM or FT/lb number to torque too? I know it is about the proper bolt stretch but surely there is a number we can use.

eboggs_jkvl

Nope, it is shown in degrees of turn to get the bolt stretch. The ARP bolts aren't torque to yield and they have torque numbers for the proper fastener application.


Elmer