How to check head warpage on 95 3.1L

[Tech II]

Anyhow, he under torqued the rocker arms by mistake the first time by only going 3/4 of a turn instead of the required 1 1/2 turns past zero lash.

Last time I remember doing that was on a 2.8, in an '88 Fiero, and that was when pistons where in a specific position.......That is not the torque spec for this engine......spec should be either a specific foot pound, or a lesser foot pound and the final turn is in degrees.....

Got the spec, GMTech1?

One thing you have to be careful with, especially rocker bolts, is removing them with a power tool before breaking them loose.....very easy to pull threads out of those heads.....

[gmtech1]

Originally Posted by Tech II

Anyhow, he under torqued the rocker arms by mistake the first time by only going 3/4 of a turn instead of the required 1 1/2 turns past zero lash.

Last time I remember doing that was on a 2.8, in an '88 Fiero, and that was when pistons where in a specific position.......That is not the torque spec for this engine......spec should be either a specific foot pound, or a lesser foot pound and the final turn is in degrees.....

Got the spec, GMTech1?

One thing you have to be careful with, especially rocker bolts, is removing them with a power tool before breaking them loose.....very easy to pull threads out of those heads.....

Rocker arm nut is 18 lbs.ft.

[gacowboy30]

Thanks for the info gmtech1. That did the trick. Engine is running perfectly now! I'm attaching a screenshot of the info he was going by from a site called Mitchell1. Thats where he got the info to tighten 1 1/2 turns past zero lash.