Pre-load Adjustment
Thread Starter
On The Tree
Joined: Jan 2004
Posts: 152
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From: Buffalo, NY
Pre-load Adjustment After installing the heads, I went through and torqued all the rocker arms to 22ft-lbs, not rotating the motor, just zipping all of them down. I'm thinking thats not what I should have done. If I go back and re-do them I should turn 1/4 to 3/4 turn past zero lash???? How bad (or not bad) is it that I didnt exactly "measure" my preload?
Just wondering what anyone else has done?
Just wondering what anyone else has done?
What he said. The stock LS1 rockers aren't adjustable...if you try to use them that way and go zero lash + whatever instead of tightening the bolts to spec, they'll loosen and you'll have noise and/or damage.
Usual process is torque them all to 22 lb/ft, rotate engine two full revolutions, then re-check at 22 lb/ft. The rotation compresses the lifters and ensures you're torquing the bolt against the head, not the valvespring + lifter.
I did mine by bringing each cyl to TDC firing stroke and torquing, following the firing order.
Usual process is torque them all to 22 lb/ft, rotate engine two full revolutions, then re-check at 22 lb/ft. The rotation compresses the lifters and ensures you're torquing the bolt against the head, not the valvespring + lifter.
I did mine by bringing each cyl to TDC firing stroke and torquing, following the firing order.
