I just want to double check with yall what’s the toque spec for the the head bolts and the the rods bolts ? And what degree after the torque ?

I don’t trust online much and I just want to confirm before

2007 hummer h3 3.7

 

Try here: https://charm.li/Hummer/2007/H3%20L5...d%20Diagnosis/

or here: https://schwarttzy.com/wp-content/up...3.7L-1-4-1.pdf

 

I use Schwartz’s but I want to make sure the information they providing is correct

 

When I rebuilt my 3.7, I used the torque values in the Schwartz manual for the head and the connecting rods.

So far (knock on wood), after about 2,500 miles, they have held up just fine.

 

I used new head bolt engineer tech but when I was torquing it . I did 22 but then the 155 degree seemed a lot I did 90 degree becuase it got really really hard and I didn’t want to snap it. Did you do 155 degree on the 2nd time?

 

I did 155 degrees on the second pass. It did seem extremely tight, but overall I didn’t have any issues with it. None of my bolts broke.

 

oh I got scared lol I don’t want to go that hard . Would it hurt if I kept it at 90?

 

the new head bolts I got were enginetech kit not GM oem but they are oem specs

 

They provide specs for a reason, they are to be followed exactly. As in torque and any sequence provided.

Imagine an engine builder saying to a customer... "yeah we rebuilt your motor, but we did not follow torque specifications because we though they seamed tight. Please pay now and good luck."

 

your right doc I went and I ****ing did it lol 155 degrees all around it was super tight but I did it . Now it’s good to go and I can continue on the rest