This applys to sbc, bbc, and up to the 90's LT1 engine. This is not applicable to the LS engines.
In this video I have already installed the hydraulic lifters, pushrods, and rockers. Now we are going to set the valves to zero lash, without having the engine set to any certain point. You can do this without having the valves, lifters or cam in a certain positition. Just keep checking for zero lash on all valves making a quarter turn between checks. You will need 2 full revolutions on the crank to make 1 revolution of the cam. Once done you can set your lifter preload to maufactuer specs, and lock them down depending on your set up. This is on 7/16 20 rocker studs. One full revolution on rocker nut = .050, so addtional half turn gave me .025 preload on hydraulic lifter.
If you have 3/8 24 studs half a turn will equal .021
If you are running solid lifters you will need a feeler guage set to set your valve lash. There is no preload on a solid lifter.
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