5.3L Torquing Stretch Bolts

[Max Simmons]

Replacing heads on my '04 5.3 liter in a Silverado 1500. The specs call for torqueing to 22lbs then another pass tightening 90 deg, then 3rd pass at 70 deg.

On second pass, I could not get several bolts to the 90 deg mark, even using a 24" bar. They are closer to 70 deg. I'm not a weakling but am concerned about torqueing any harder than I already have.

Advice?

 

Thanks in advance!

 

 

[txab]

You are using new bolts, right?

[Hootbro]

My understanding of torque to yield bolts is that once you are past the initial specific torque and have committed to first angle degree torque, you are beyond the point of no return and any backing off to chase thread holes or other such remedies, you need to install a new fresh set of torque to yield bolts.

[MikeNH]

My understanding of torque to yield bolts is that once you are past the initial specific torque and have committed to first angle degree torque, you are beyond the point of no return and any backing off to chase thread holes or other such remedies, you need to install a new fresh set of torque to yield bolts.

 

 

Correct.

[Max Simmons]

Correct.

[Jsdirt]

Run a tap thru all the holes to clean them up?

[MikeNH]

Make sure the bolt holes are free of liquid. The bolt runs to the bottom so if you have any antefreeze in there it'll block the bolt.