Rocker Arms/Roller Followers Removal and Installation on 2005 Ford Explorer ?

Rocker Arms & Roller Followers

Removal & Installation

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:

1. If equipped, loosen the valve lash adjusting screws a few turns. Apply engine oil to the assembly to provide initial lubrication.
2. 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. Rocker arm and shaft assembly-4.0L OHV engine

4.0L SOHC Engines

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. Rocker arm and shaft assembly-4.0L SOHC engine
5. Using special tool T97T-6565-A depress the valve spring. Slide the cam follower over the lash adjuster and out from under the camshaft.

To install:

1. Compress the valve spring and slide the roller follower into position.
2. Release the tension from the spring.
3. Install the valve cover and connect the negative battery cable.

4.6L Engine

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove the valve cover.
3. Position the piston of the cylinder being repaired at the bottom of the stroke.
4. Install the special tool between the valve spring coils to prevent valve stem seal damage.
   
   NOTE

   The roller followers are positional. Mark the followers for installation in their original locations.
   
   
   
   
   

   

   Fig. Install this tool to prevent seal damage-4.6L engine
   
   
   
   Compress the valve springs and remove the camshaft roller followers.
5. Installation is the reverse of removal.
   
   NOTE

   There are several kinds of bolts used in fastening the valve cover. The bolts must be installed in their original locations.

5.0L 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. Exploded view of the rocker arm assembly. Notice the fulcrum guide between the pedestals used for extra stability-5.0L engine

To install:

1. Lubricate the rocker arm assemblies with SAE 50W engine oil.
2. Ensure that the fulcrums are properly seated into the cylinder head (3.0L engines) or the fulcrum guide (5.0L engines). Torque the rocker arm fulcrum bolts to 19 ft. lbs. (26 Nm).
3. Install the rocker arm covers and connect the negative battery cable.

-----------