Ram B1500, B2500, B3500, 1999-2003

Rocker Arms

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Inspection



  1. Most damage to these components would be caused by lack of lubrication, very high mileage or a combination of the two.
  2.  
  3. Check for bluing which is a result of overheating. Replace any parts thus damaged.
  4.  
  5. Check the wear surfaces on rocker arm and pivots. If normal, high-mileage wear is obvious on any rocker arm, replacing all of them might be a good idea.
  6.  
  7. On diesels, check rocker arm shafts and bores for excessive play and obvious physical damage.
  8.  



Click image to see an enlarged view

Fig. Check rocker arm wear surfaces (arrows)



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Fig. Inspect rocker arm pivots for wear or damage

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    WARNING
    The sockets may fall out of the rocker arms as the rocker arms are lifted from the cylinder head. Do not drop the sockets into the engine.


    NOTE
    Keep all valvetrain components in order for assembly.



    Negative battery cables
     
    Valve cover
     



    Rocker arms and pedestal assemblies

    Click image to see an enlarged view

    Fig. Exploded view of the rocker arm mounting-5.9L diesel engine



    Click image to see an enlarged view

    Fig. Exploded view of the rocker arm-5.9L diesel engine

     

  4.  

To install:

  1. Install or connect the following:

    Rocker arm and pedestal assemblies. Tighten the bolts to 27 ft. lbs. (36 Nm).
     
    Valve cover. Tighten the bolts to 18 ft. lbs. (24 Nm).
     
    Negative battery cables
     

  2.  


NOTE
Valve train components must be reinstalled in their original locations. Lay out and tag all components to ease assembly.

12-Valve Diesel
  1. Remove the valve cover(s).
  2.  
  3. Loosen the valve lash adjusting screw locknuts. Loosen the adjusting screws until they stop.
  4.  
  5. Remove the bolts from the rocker arm pedestals. Remove the pedestals and rocker arms.
  6.  
  7. Remove the retaining ring and push out the rocker arm shaft if further disassembly is desired.
  8.  
  9. Remove the pushrods. The rearmost pushrods are removed through the cowl panel access holes.
  10.  

To install:

  1. Make sure the dowel rings in the pedestals are installed in the dowel bores in the cylinder head.
  2.  
  3. If the pushrod is holding a pedestal off its seat, turn the engine until the pedestal reaches the seat.
  4.  
  5. Use clean engine oil to lubricate rocker arm components, cylinder head bolt threads and under bolt heads.
  6.  
  7. Install the bolts and tighten all 12mm bolts as follows:
    1. Tighten in the order shown, starting in the center of the head and working outward.
    2.  
    3. Tighten to 66 ft. lbs. (90 Nm) on the first step, then 89 ft. lbs. (120 Nm), then an additional 90-.
    4.  

  8.  



Click image to see an enlarged view

Fig. Rocker arm assembly-12-valve diesel



Click image to see an enlarged view

Fig. Rocker arm bolt tightening sequence-12-valve diesel

2.5L, 3.9L, 5.2L, 5.9L, 8.0L Gasoline Engines
  1. Remove the valve cover(s).
  2.  
  3. On the 2.5L engine, adjacent rocker arms are linked by a bridge. Loosen paired bolts evenly, and then remove bolts, bridge, pivot assembly and rocker arms.
  4.  
  5. On other models, loosen the rocker arm bolt and remove the bolt, pivot assembly and rocker arm. V-10 engines have a retainer beneath the rocker arms.
  6.  
  7. Remove the pushrods, if required. Note locations of each for reassembly.
  8.  

To install:

  1. On the V-6 and V-8 engines, rotate the crankshaft until the "V6" or "V8" mark lines up with the TDC mark on the timing chain case cover.
  2.  
  3. Clean and lubricate all parts.
  4.  
  5. Be sure the pushrods are seated in the tappets.
  6.  
  7. Apply clean engine oil to the pushrod tip and to the rocker arm pivot.
  8.  
  9. Tighten rocker arm bolts to 21 ft. lbs. (28 Nm). On the 2.5L engine, tighten the adjacent bolts gradually until the proper torque is reached.
  10.  


WARNING
Do NOT rotate or crank the engine during or immediately after rocker arm installation. Allow the hydraulic tappets about five minutes to bleed down.



Click image to see an enlarged view

Fig. 2.5L engine rocker arm assembly



Click image to see an enlarged view

Fig. 5.2L engine rocker arm assembly



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Fig. Remove a rocker arm bolt-5.2L engine shown



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Fig. Rocker arm assembly-5.2L engine shown



Click image to see an enlarged view

Fig. Removing a pushrod. Be sure to note location for reassembly. A cardboard box with a hole for each pushrod will do the trick

24-Valve Diesel
  1. Remove the cylinder head cover.
  2.  
  3. Unscrew and remove the rocker arm pedestal bolts.
  4.  
  5. Remove the pushrods. The rearmost pushrods are removed through the cowl panel access holes.
  6.  

To install:

  1. Be sure the pushrods are seated in the tappets.
  2.  
  3. Lubricate pushrod ends and other parts.
  4.  
  5. Tighten pedestal bolts to 27 ft. lbs. (36 Nm).
  6.  
  7. Adjust the valve lash.
  8.  



Click image to see an enlarged view

Fig. Rocker arm and pedestal assembly-24-valve diesel

3.7L And 4.7L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Valve covers
     

  4.  
  5. Rotate the crankshaft so that the piston of the cylinder to be serviced is at Top Dead Center (TDC) and both valves are closed.
  6.  
  7. Use special tool 8516 to depress the valve and remove the rocker arm.
  8.  
  9. Repeat for each rocker arm to be serviced.
    NOTE
    Keep valvetrain components in order for reassembly.



    Click image to see an enlarged view

    Fig. Rocker arm service-3.7L and 4.7L engines

  10.  

To install:

  1. Rotate the crankshaft so that the piston of the cylinder to be serviced is at BDC.
  2.  
  3. Compress the valve spring and install each rocker arm in its original position.
  4.  
  5. Repeat for each rocker arm to be installed.
  6.  
  7. Install or connect the following:

    Cylinder head cover
     
    Negative battery cable
     

  8.  

3.9L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Keep all valvetrain components in order for assembly.



    Negative battery cable
     
    Valve covers
     
    Rocker arms
     

  4.  

To install:

  1. Rotate the crankshaft so that the V6 mark on the crankshaft damper aligns with the timing mark on the front cover. The V6 mark is located 147 degrees AFTER Top Dead Center (TDC).
  2.  
  3. Install the rocker arms in their original positions and tighten the bolts to 21 ft. lbs. (28 Nm).
    CAUTION
    Do not rotate the crankshaft during or immediately after rocker arm installation. Wait 5 minutes for the hydraulic lash adjusters to bleed down.

  4.  
  5. Install or connect the following:

    Valve covers
     
    Negative battery cable
     

  6.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Keep all valvetrain components in order for assembly.



    Negative battery cable
     
    Engine cover
     
    Valve covers
     
    Rocker arms
     

  4.  

To install:

  1. Rotate the crankshaft so that the V6 mark on the crankshaft damper aligns with the timing mark on the front cover. The V6 mark is located 147 degrees AFTER Top Dead Center (TDC).
  2.  
  3. Install the rocker arms in their original positions and tighten the bolts to 21 ft. lbs. (28 Nm).
    CAUTION
    Do not rotate the crankshaft during or immediately after rocker arm installation. Wait 5 minutes for the hydraulic lash adjusters to bleed down.

  4.  
  5. Install or connect the following:

    Valve covers
     
    Engine cover
     
    Negative battery cable
     

  6.  

4.7L Engine

NOTE
Rocker arm removal requires the use of special tool, mfg. P/N 8516.

  1. Disconnect the battery negative cable.
  2.  
  3. Remove the cylinder head cover(s).
  4.  
  5. Rotate the crankshaft so that the piston of the cylinder to be serviced is at Bottom Dead Center (BDC) and both valves are closed.
  6.  
  7. Use special tool 8516 to depress the valve and remove the rocker arm.
  8.  
  9. Repeat for each rocker arm to be serviced.
  10.  


NOTE
Keep all valve train components in order for reassembly.



Click image to see an enlarged view

Fig. Using special tool 8516 to depress valve for rocker arm removal-4.7L engine

To install:

  1. Rotate the crankshaft so that the piston of the cylinder to be serviced is at BDC.
  2.  
  3. Compress the valve spring and install each rocker arm in its original position.
  4.  
  5. Repeat for each rocker arm to be installed.
  6.  


WARNING
Be sure the rocker arms are installed with the concave pocket over the lash adjusters.

5.2L & 5.9L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Keep valvetrain components in order for reassembly.



    Negative battery cable
     
    Valve covers
     
    Rocker arms
     

  4.  

To install:

  1. Rotate the crankshaft so that the V8 mark on the crankshaft damper aligns with the timing mark on the front cover. The V8 mark is located 147 degrees AFTER Top Dead Center (TDC).
  2.  
  3. Install the rocker arms in their original positions and tighten the bolts to 21 ft. lbs. (28 Nm).
    CAUTION
    Do not rotate the crankshaft during or immediately after rocker arm installation. Wait 5 minutes for the hydraulic lash adjusters to bleed down.

  4.  
  5. Install or connect the following:

    Valve covers
     
    Negative battery cable

    Click image to see an enlarged view

    Fig. Exploded view of the rocker arm assembly-8.0L engine

     

  6.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Keep valvetrain components in order for reassembly.



    Negative battery cable
     
    Engine cover
     
    Valve covers
     
    Rocker arms
     

  4.  

To install:

  1. Rotate the crankshaft so that the V8 mark on the crankshaft damper aligns with the timing mark on the front cover. The V8 mark is located 147 degrees AFTER Top Dead Center (TDC).
  2.  
  3. Install the rocker arms in their original positions and tighten the bolts to 21 ft. lbs. (28 Nm).
    CAUTION
    Do not rotate the crankshaft during or immediately after rocker arm installation. Wait 5 minutes for the hydraulic lash adjusters to bleed down.

  4.  
  5. Install or connect the following:

    Valve covers
     
    Engine cover
     
    Negative battery cable
     

  6.  

8.0L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Keep valvetrain components in order for reassembly.



    Negative battery cable
     
    Valve covers
     
    Rocker arms
     

  4.  

To install:


CAUTION
When installing the rocker arms, ensure that the piston is not at Top Dead Center. Tighten the rocker arm bolts slowly. Do not rotate the crankshaft during or immediately after rocker arm installation. Wait 5 minutes for the hydraulic lash adjusters to bleed down.

  1. Install or connect the following:

    Rocker arms in their original positions. Tighten the bolts to 21 ft. lbs. (28 Nm).
     
    Valve covers
     
    Negative battery cable
     

  2.  

 
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