Changing the head gaskets on my 3.8 v6 and am wondering what torque the head bolts need to go on at, and what pattern do I torque them down in?

Thanks,
-Zach

------------------
Do something that makes you happy.. If it no longer makes you happy, stop doing it.

Start middle bolts and work outward, 37 ft lbs to all, then + 120 deg to all. It's a two step torque spec.

------------------

[This message has been edited by Custom2M4 (edited 12-01-2013).]

My apologies it is for a 3.4 V6 not a 3.8. a typo on my part, is it the same pattern and torque for that engine as well?

Welcome to the Forum!

http://60degreev6.com/conte...-1%29-Specifications

Thanks for the welcome!

And just to make sure I'm going to get this right I start in the middle of the heads and giving them each 37 ft lbs until all are tight
Then I go back in the same pattern as before and turn each bolt an extra 120° of rotation?

Not according to the link that Gall757 posted. Follow the order shown in the little numbering sequence like this:


*Manifold Side*

6 2 3 7

5 1 4 8

* Outer Side *

...and tighten all of them to 41 lbft, then return for a second pass tightening them a further 90 degrees rotation in the same sequence:

That's for a 3.8, he HAS a 3.4 different

The correct numbers for the 3.4 are 41ft/lbs and 90 degrees. Those other numbers belong to the 3.8 (37ft/lbs and 120 degrees). It sounds to me like the bolts all end up just about the same....but you never know.

I torqued the heads down at 41 and then I went back put the extra 90° on it and it equated to something around 150 foot pounds... That seems like a lot or is it normal