Rocker Arms/Shafts

REMOVAL & INSTALLATION

2.3L, 2.5L

NOTE: A special tool is required to compress the valve spring.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Disconnect the negative battery cable.
3. Remove the valve cover.
4. Rotate the camshaft so that the base circle of the cam is against the cam follower you intend to remove.

   NOTE: If removing more than one cam follower, label them so they can be returned to their original position.

   Fig. 1: To remove the cam follower (rocker arm), use the special tool to depress the valve spring, then remove the cam follower — 2.3L and 2.5L engines

5. Using special tool T88T-6565-BH for 2.3L and 2.5L engines, depress the valve spring. Slide the cam follower over the lash adjuster and out from under the camshaft.

   To install:

6. Compress the valve spring and slide the roller follower into position.
7. Release the tension from the spring.
8. Install the valve cover and connect the negative battery cable.

3.0L Engines

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove or disconnect the following:
   • Negative battery cable
   • Rocker arm covers
   • Retaining bolt at each rocker arm
3. The rocker arm and pushrod may then be removed from the engine. Keep all rocker arms and pushrods in order so they may be installed in their original locations.

   Fig. 2: Exploded view of the rocker arm assembly — 3.0L engine

   To install:

4. Lubricate the rocker arm assemblies with SAE 50W engine oil.
5. Ensure that the fulcrums are properly seated into the cylinder head (3.0L engines). Torque the rocker arm fulcrum bolts to 19 ft. lbs. (26 Nm).
6. Install the rocker arm covers and connect the negative battery cable.

4.0L OHV Engine

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove or disconnect the following:
   • Negative battery cable
   • Rocker arm covers
   • Rocker arm shaft stand attaching bolts by loosening the bolts 2 turns at a time, in sequence (from the end of the shaft to the middle of the shaft)
   • Rocker arm and shaft assembly

   To install:

3. If equipped, loosen the valve lash adjusting screws a few turns. Apply engine oil to the assembly to provide initial lubrication.
4. Install or connect the following:
   • Rocker arm shaft assembly to the cylinder head and guide adjusting screws on to the pushrods
   • Rocker arm stand. Torque the bolts to 46–52 ft. lbs. (62–70 Nm), 2 turns at a time, in sequence (from middle of shaft to the end of the shaft).
   • Rocker arm covers
   • Negative battery cable

     Fig. 3: Rocker arm and shaft assembly — 4.0L OHV engine