Zero Clearance valve lash ?

Use the search feature here @ FABO to find how to get each cylinder on the proper stroke so you can adjust them properly. The reason that you adjust hydraulics by turning the adjuster past zero lash is to preload the lifter. It puts it in the middle of it's stroke. Gives it a cushion so to speak. The Chevy guys tighten them until the tick noise goes away (zero lash) and then a 1/2 to a full turn. Mopar adjustables are harder to do with the engine running because the adjuster is on the pushrod end of the rocker instead of on the pivot point like the Chevy's are. toolmanmike