Rocker Arm Assembly: Service and Repair
REMOVALNOTE: This procedure can be done with the engine in or out of the vehicle.
1. Remove the cylinder head cover.
2. Check for rocker arm bridges which are causing misalignment of the rocker arm to valve tip area.
3. Remove the capscrews at each bridge and pivot assembly (Fig. 22). Alternately loosen the capscrews one turn at a time to avoid damaging the bridges.
4. Remove the bridges, pivots and corresponding pairs of rocker arms (Fig. 22). Place them on a bench in the same order as removed.
5. Remove the push rods and place them on a bench in the same order as removed.
CLEANING
Clean all the components with cleaning solvent.
Use compressed air to blow out the oil passages in the rocker arms and push rods.
INSPECTION
Inspect the pivot surface area of each rocker arm.
Replace any that are scuffed, pitted, cracked or excessively worn.
Inspect the valve stem tip contact surface of each rocker arm and replace any rocker arm that is deeply pitted.
Inspect each push rod end for excessive wear and replace as required. If any push rod is excessively worn because of lack of oil, replace it and inspect the corresponding hydraulic tappet for excessive wear.
Inspect the push rods for straightness by rolling them on a flat surface or by shining a light between the push rod and the flat surface.
A wear pattern along the length of the push rod is not normal. Inspect the engine cylinder head for obstruction if this condition exists.
INSTALLATION
NOTE: This procedure can be done with the engine in or out of the vehicle.
1. Lubricate the ball ends of the push rods with MOPAR Engine Oil Supplement, or equivalent and install push rods in their original locations. Ensure that the bottom end of each push rod is centered in the tappet plunger cap seat.
2. Using Mopar Engine Oil Supplement, or equivalent, lubricate the area of the rocker arm that the pivot contacts. Install rocker arms, pivots and bridge above each cylinder in their originally position (Fig. 23).
3. Loosely install the capscrews through each bridge.
4. At each bridge, tighten the capscrews alternately, one turn at a time, to avoid damaging the bridge. Tighten the capscrews to 28 Nm (21 ft. lbs.) torque.
5. Install the engine cylinder head cover.