How to replace Rocker Arms and Shafts on 2005 Ford Explorer?

Rocker Arms & Shafts

Removal & Installation

This procedure covers the removal and installation of the Camshaft Roller Follower and Hydraulic Lash Adjusters.

4.0L Engine
VIN E Engine

1. Before servicing the vehicle, refer to the -Precautions- section.
2. Disconnect the negative battery cable.
3. Remove the valve cover.
4. Remove the fuel rail.
5. Remove the cooling fan (except Sport-Trac).
6. Rotate the crankshaft until the camshaft for the cylinder being serviced is at base circle.
   
   NOTE

   If removing more than one cam follower, label them so they can be returned to their original position.
7. Using special tool 303-581, remove the camshaft roller followers.
   
   
   

   

   Fig. Rotate the crankshaft until the camshaft for the cylinder being serviced is at base circle-2005 4.0L engine
   
   
   
   

   

   Fig. Rotate the crankshaft until the camshaft for the cylinder being serviced is at base circle-2006 4.0L engine
   
   
   
   

   

   Fig. Using special tool 303-581, remove the camshaft roller follower-2005 4.0L engine
   
   
   
   

   

   Fig. Exploded view of valve train components-2005-07 4.0L (VIN E) engine (RH components shown; LH components similar)
8. Mark each lash adjuster before removal; remove each lash adjuster, as necessary.

To install:

1. Lubricate the lash adjusters and camshaft roller followers with clean engine oil.
2. Install each lash adjuster.
3. Using special tool 303-581, remove the camshaft roller followers into their original positions.
4. Install the cooling fan, if removed.
5. Install the fuel rail.
6. Install the valve cover.
7. Connect the negative battery cable.

4.6L (VIN H) DOHC Engine

1. Before servicing the vehicle, refer to the -Precautions- section.
2. Remove the valve covers.
3. Remove the cooling fan.
4. Remove the spark plugs.
   
   NOTE

   Position the piston of the cylinder to be serviced at the bottom of the stroke and the camshaft at base circle.
5. Using the special tool, partially compress the intake valve spring and remove the camshaft roller follower.
   
   
   

   

   Fig. Compressing the intake valve spring-4.6L (VIN H) DOHC engine
   
   
   
   

   

   Fig. Compressing the exhaust valve spring-4.6L DOHC engine
6. Using the special tool, partially compress the exhaust valve spring and remove the camshaft roller follower.
   
   NOTE

   Mark the location of the hydraulic lash adjusters to make sure they are assembled in their original position.
7. Remove the hydraulic lash adjusters.
8. Installation is the reverse of the removal procedure.
   
   
   

   

   Fig. Exploded view of valve train components-2005 Aviator 4.6L (VIN H) DOHC engine

4.6L (VIN W) Engine

1. Before servicing the vehicle, refer to the -Precautions- section.
2. Remove the valve covers.
3. Remove the cooling fan.
4. Disconnect the electrical connectors and remove the bolts and ignition coils.
5. Remove the spark plugs.
6. Rotate the crankshaft until the cam lobe is directly away from the roller follower.
   
   
   

   

   Fig. Rotate the crankshaft until the cam lobe is directly away from the roller follower-4.6L (VIN 8) DOHC engine
7. Install the special tool 303-382 onto the valve spring as shown.
   
   NOTE

   The 3 rearmost followers on the RH side must use special tool 303-581 in the same manner as is shown in the illustration.
   
   
   
   NOTE

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

   

   Fig. Install the special tool onto the valve spring-4.6L (VIN 8) DOHC engine
8. Using the special tool 303-452, partially compress the exhaust valve spring and remove the camshaft roller follower.
   
   
   

   

   Fig. Using the special tool 303-452, partially compress the exhaust valve spring and remove the camshaft roller follower-2005 4.6L (VIN 8) DOHC engine
9. Remove the hydraulic lash adjusters.
10. Installation is the reverse of the removal procedure.
    
    
    

    

    Fig. Exploded view of valve train components-2005 Explorer And Mountaineer 4.6L (VIN W) SOHC engine