Quote:
Originally Posted by Danvitt
Hello all, I have a new crate engine that I installed and I'm having a little trouble getting it to run smooth.
First off, I followed the instructions per the Haynes manual to adjust the valves (engine off procedure). Lightly using finger tips to turn push rod until resistance is felt, then tighten 3/4 of a turn.
Well first it started up fine and i ran it for a minute. Did this a few times (still had to bolt on the exhaust). I tried again later after I finished bolting up the pipes and it ran like crap. Noticed smoke and pressure coming through the TBI. So I backed off each of the intake rockers a 1/4 turn and it started running smoother. So then I proceeded to perform the adjustment with the engine running and found I had to back it way off. I loosened them up till the ticking noise is heard and tightened them up 3/4 a turn.
Here's the question. I've done extensive internet searching and everyone has a different variation of how many turns I should tighten. I've seen anywhere for 1/8 turn to 1 full turn (engine running procedure). Can you clear this up for me? This is a 93 5.7L chevy silverado.
Thanks for your help.
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Depends on what the full travel of lifter is.
Factory specs = center the lifter for adjustment.
Like.
If a 3 turn lifter set adjustment in center of lifter or 1-1/2 turns.
I always adjust them on looser side like 3 turn lifter set at 1 turn.
I like to set them good engine off and forget the messey engine running. seetting.
Most good crate engines should already be adjusted.