Rocker Arm Assembly: Service and Repair

When disassembling rocker arms, place all parts on the workbench in their proper sequence to ensure correct assembly.

Clean all sludge and gum formation from the inside and outside of the shafts. Clean oil holes and passages in the rocker arms and shafts. Inspect the shafts for wear.
1. Disconnect spark plug wires from plugs and position aside.
2. Remove rocker arm cover and gasket.
3. On all engines except 8.0L/V10-488, remove rocker arm bolts, pivots and pushrods. Mark for installation reference.

Fig. 16 Rocker Arms:

4. On 8.0L/V10-488 engines, remove rocker arm bolts and assemblies then the pushrods. Mark rocker arm assemblies and pushrods for installation reference.

Fig. 17 Rocker Arm Assembly:

5. Reverse procedure to install, noting the following:
a. Tighten rocker arm bolts to 28 Nm (21 ft-lbs).
b. Do not crank engine during or immediately after rocker arm installation. Allow up to 20 minutes for hydraulic roller tappets to bleed down.