I’m not going to say it will fix your problem, but the book calls for 1-1/2 turns.
If set any amount less then that the spring inside the lifter is not compressed enough for it to have the force needed to push the plunger up against the push rod and fill the working area inside the lifter with oil.
In some cases setting the adjustment at 1-3/4 turns will fix the problem. You don’t want the over tightening the adjustment much more than that or you run the risk of holding a valve open a bit.
