Head torque steps

[Tyes93TY]

I'm gonna be puttin my heads on the L31 block this weekend.From what I've been told, there are two different methods for torquing the head bolts. Older engines are torqued by ft lbs, and later engines are torqued by degrees. I'm using an 2001 L31 block with converted Vortec heads. Which method and what sequence do I use? Thanks in advance!

 

[NecroWolf]

Re: Head torque steps

get a set of arp bolts. makes it easy. i know you start in the center and work out in a spiral pattern in a three step sequence.

 

[Don W.]

Re: Head torque steps

I'm gonna be puttin my heads on the L31 block this weekend.From what I've been told, there are two different methods for torquing the head bolts. Older engines are torqued by ft lbs, and later engines are torqued by degrees. I'm using an 2001 L31 block with converted Vortec heads. Which method and what sequence do I use? Thanks in advance!

As I remember it the "degree" system starts with a low torque and goes by degrees after that. It's very accurate for large fasteners. I haven't seen it apply to small bolts but that doesn't mean it couldn't be used if you had the correct info.

 

[NecroWolf]

Re: Head torque steps

if the bolts are like that thet are torque to yield and suppose to be replaced after so many cycles.