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Old 09-29-2006, 10:00 PM
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Hydraulic valve adjustment?

I have done some research on adjusting valves in a 350 engine with a hydraulic cam and I am getting several answers. Adjust rocker nut while valve is closed to zero lash, then tighten an additional 1/4 or 1/2 or 1 turn. Which is it?

What are most of you doing with good results?

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Old 09-29-2006, 10:49 PM
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valve lash

usally is depends on the year, you can be safe doing the 1/2 turn on stock lifters. this will set the lifter piston in half way, that where you want it.take our time and dont hurry.
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Old 09-30-2006, 12:35 PM
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It sometimes depends on the lifter manufacturer or cam grinder. I usually start with 1/2 turn and if I get chatter I go another half until its 1 turn.

Some lifters will hold the valve off the seat at 1 turn, but a vacuum gauge and your ear will tell you that.
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Old 10-02-2006, 09:49 AM
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I have been doing it a little different the last few years.
I take the push rod between my index finger and thumb and turn it while tightning down the rocker nut. I tighten it down until I am just barely able to turn it with a little pressure. This will get you to exactly 0 lash.
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