Hydraulic lifter preload

Oh and one more useful tidbit. If your lifters have the really crappy thin wire retainers holding the lifter plungers in, I would err on a little heavier preload adjustment. If they have the heavy duty snap rings, you can go a light touch like I described. Adjusting light preload with the thin wire retainers and there's always a risk that the plunger "could" come all the way to the top of its travel and pop the retainer out and then out comes the plunger. That would suck. So if it has the thin wire retainers, maybe go 3/4 to 1 full turn down.