Adjustable Rocker Arm Help....

all hyd. lifters run anywhere from about .020 to .060 preload. 1/4 turn is on the low side about .020 so 1/2 turn sets you about .040, I set all mine to .040 to start and most every time no more adjustment is needed. as far as the lifter plunger still having play i wouldn't worry about it. when you shut the motor off if there is still pressure (like the valve part way open) on the plunger then it is already starting to bleed the oil out of the lifter. the pump pressurizing the oil through the body is what pumps it up, plus there is alot of play in the lifter besides the preload. most can take up to .090 or a .10.