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    Lincoln Aviator, Ford Explorer, Exp Sport, Exp Sport-Trac, Mercury Mountaineer 2000-2005

    Camshaft Followers & Lash Adjusters

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    Removal & Installation



    4.0L (VIN E) SOHC Engine

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

    1. Before servicing the vehicle, please familiarize yourself with safety procedures.
    2.  
    3. Disconnect the negative battery cable.
    4.  
    5. Remove the valve cover.
    6.  
    7. 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.

    8.  
    9. Using special tool T97T-6565-A depress the valve spring. Slide the cam follower over the lash adjuster and out from under the camshaft.

      Click image to see an enlarged view

      Fig. Right side valve train components-4.0L engine



      Click image to see an enlarged view

      Fig. Left side valve train components-4.0L engine

    10.  

    To install:

    1. Compress the valve spring and slide the roller follower into position.
    2.  
    3. Release the tension from the spring.
    4.  
    5. Install the valve cover and connect the negative battery cable.
    6.  

    4.0L Ohv Engine (VIN X)
    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. 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
       

    4.  

    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.  
    3. 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

      Click image to see an enlarged view

      Fig. Rocker arm and shaft assembly-4.0L OHV engine

       

    4.  

    4.6L (VIN H) DOHC Engine
    1. Before servicing the vehicle, please familiarize yourself with safety procedures.
      NOTE
      This step is necessary for camshaft removal and installation only.

    2.  
    3. Remove the engine front cover, timing gears, chain and tensioners.
    4.  
    5. Remove the valve covers.
      NOTE
      Position the piston of the cylinder to be serviced at the bottom of the stroke and the camshaft at base circle.

    6.  
    7. Using the special tool, partially compress the intake valve spring and remove the camshaft roller follower.

      Click image to see an enlarged view

      Fig. Valve train components-4.6L DOHC engine



      Click image to see an enlarged view

      Fig. Compressing the intake valve spring-4.6L DOHC engine



      Click image to see an enlarged view

      Fig. Compressing the exhaust valve spring-4.6L DOHC engine

    8.  
    9. 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.

    10.  
    11. Remove the hydraulic lash adjusters.
    12.  
    13. Installation is the reverse of removal.
    14.  

    4.6L (VIN W) SOHC Engine
    1. Before servicing the vehicle, please familiarize yourself with safety procedures.
    2.  
    3. Remove the valve cover.
    4.  
    5. Position the piston of the cylinder being repaired at the bottom of the stroke.
    6.  
    7. 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.



      Click image to see an enlarged view

      Fig. Valve train components-4.6L SOHC engine



      Click image to see an enlarged view

      Fig. Install this tool to prevent seal damage-4.6L SOHC Engine



      Compress the valve springs and remove the camshaft roller followers.
       

    8.  
    9. 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.

    10.  

    5.0L Engines
    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Remove or disconnect the following:

      Negative battery cable
       
      Rocker arm covers
       
      Retaining bolt at each rocker arm
       

    4.  
    5. 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.

      Click image to see an enlarged view

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

    6.  

    To install:

    1. Lubricate the rocker arm assemblies with SAE 50W engine oil.
    2.  
    3. Ensure that the fulcrums are properly seated into the fulcrum guide. Torque the rocker arm fulcrum bolts to 19 ft. lbs. (26 Nm).
    4.  
    5. Install the rocker arm covers and connect the negative battery cable.
    6.  

     
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