Can someone tell me the order and torque specs for the heads of a 3.1l?

 

I can't tell you the exact sequence for torque, but you are supposed to start from the center and work your way outward in a circular pattern.

My Haynes manual says that the proper torque is 55 ft-lb first pass, then the second pass you just go an additional 1/2 turn. Apparently, the head bolts were designed to stretch by a certain amount. The 55 ft-lbs compresses the gasket and everything, and the additional 1/2 turn stretches the bolts.

I've got the heads off of my 3.1 right now. I blew a head gasket a few months ago, and I just got the heads back from the machine shop.

 

Good deal

 

6 2 3 7
5 1 4 8

when looking at the head from the exhaust side... that's the order for the bolts, both sides

first time you torque them to 41 ft lbs... then go back around and turn an extra 1/4 turn...

this is correct for the 60 degree GM 3.1L

check 60degreev6.com if you have any other concerns with torque settings...

 

Super good deal! Awesome!!!

 

Yep, he's right. I double checked my manual when I got home and it calls for 40 ft-lbs for the first pass, and then a 90 degree additional turn.

The pattern is exactly what was described...

Don't forget that you need to chase the threads out in the block with an
M11x1.5 tap, and also clean the threads on your bolts. There is supposed to be a sealant used on the threads to keep the coolant from leaking past them and being able to get into your oil. The threads in the block go all the way into the water jacket instead of being in blind holes. The sealant is supposed to be some hardening type of sealant, not just any sealant. You might want to ask someone at the parts house about it. I am sure that they have something that will do.