The first step to serving or repairing the lift/lash adjuster is to remove the engine cylinder head and then the push rods. The use of a hydraulic tool helps cabinets remove the valves through the push rod holes at the base of the cylinder block. Use a cleaning solvent to clean every tappet assembly and remove varnish, gum and sludge. On each tappet, back in their positions, check the side and bottom for scuffing; check the base with a straightedge and change the camshaft and tappets if the base is concave. Following cleaning and the inspection phase, place an acceptable ball bearing on the tappet plunger cap, let it drop into the tester cup and pour in hydraulic valve tappet test oil so that the tester cup is no less than 7.5 mm deep. Press the tappet plunger to remove trapped air, then move the ram to put the pointer on the SET mark and secure with the hex nut. Turn the tester cup handle clockwise and watch how long the tappet leaks; if it doesn't leak down within 20 - 110 seconds, do not use it and discard the parts. Dip every tappet in Mopar Engine Oil Supplement or something equivalent and use the Hydraulic Valve Tappet Removal/Installation Tool to fit the tappet back into the original bore. Carefully grip the cylinder head, push rods, rocker arms and both bridge and pivot assemblies, fix the capscrews just loose and tighten them alternately to 28 Nm before you finish. Add the remaining Mopar Engine Oil Supplement into the valve actuating component, so it remains together with the engine oil for at least 1,609 km. The next step is to put on the cylinder head cover.