2.4L And 3.0L Engines
These engines are equipped with hydraulic auto lash adjusters. The auto lash adjusters automatically control valve lash. No adjustment is necessary.3.3L And 3.8L Engines
These engines are equipped with hydraulic valve lifters. The function of the hydraulic valve lifter is to maintain zero valve lash during the entire valve opening and closing process; any lash is instantaneously taken up by hydraulic action. Proper adjustment is maintained automatically by hydraulic pressure in the valves, therefore, valve lash adjustment is not possible.