Ram Truck 1500, 2500 & 3500 (2006-2008)

Timing Chain Cover, Chain, Sprockets, & Seal

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Removal & Installation



3.7L & 4.7L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Valve covers
     
    Radiator fan
     
    Heater hoses
     
    Alternator
     
    Air conditioning compressor
     
    Power steering pump
     
    Front cover
     

  6.  
  7. Rotate the crankshaft so that the crankshaft timing mark aligns with the Top Dead Center (TDC) mark on the front cover, and the V8 or V6 marks on the camshaft sprockets are at 12 o-clock.

    Access plugs from the cylinder heads
     
    Oil fill housing
     
    Crankshaft damper

    Click image to see an enlarged view

    Fig. Crankshaft timing marks-3.7L and 4.7L engines



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    Fig. Camshaft positioning-4.7L engine



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    Fig. Camshaft sprocket timing marks-3.7L



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    Fig. Cylinder head access plugs-3.7L



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    Fig. Cylinder head access plug locations-4.7L engine



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    Fig. Compress and lock the primary chain tensioner-4.7L engine

     

  8.  
  9. Compress the primary timing chain tensioner and install a lock pin.
  10.  
  11. Remove the secondary timing chain tensioners.
  12.  
  13. Hold the left camshaft with adjustable pliers and remove the sprocket and chain. Rotate the left camshaft 15 degrees clockwise to the neutral position.
  14.  
  15. Hold the right camshaft with adjustable pliers and remove the camshaft sprocket. Rotate the right camshaft 45 degrees counterclockwise to the neutral position.
  16.  
  17. Remove the primary timing chain and sprockets.
  18.  

To install:

Click image to see an enlarged view

Fig. Secondary timing chain tensioner preparation-3.7L and 4.7L engines

  1. Use a small pry tool to hold the ratchet pawl and compress the secondary timing chain tensioners in a vise and install locking pins.
    NOTE
    The black bolts fasten the guide to the engine block and the silver bolts fasten the guide to the cylinder head.

  2.  
  3. Install or connect the following:

    Secondary timing chain guides. Tighten the bolts to 21 ft. lbs. (28 Nm).
     
    Secondary timing chains to the idler sprocket so that the double plated links on each chain are visible through the slots in the primary idler sprocket
     

  4.  
  5. Lock the secondary timing chains to the idler sprocket with Timing Chain Locking tool as shown.

    Click image to see an enlarged view

    Fig. Installing the idler gear and timing chains-3.7L and 4.7L engines



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    Fig. Counterbalance shaft timing marks-3.7L



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    Fig. Tightening the left side camshaft sprocket-3.7L and 4.7L engines



    Click image to see an enlarged view

    Fig. Tightening the right side camshaft sprocket-3.7L and 4.7L engines



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    Fig. Use the Timing Chain Locking tool to lock the timing chains on the idler gear-4.7L engine



    Click image to see an enlarged view

    Fig. Timing chain system and alignment marks-3.7L engine



    Click image to see an enlarged view

    Fig. Timing chain system and alignment marks-4.7L engine

  6.  
  7. Align the primary chain double plated links with the idler sprocket timing mark and the single plated link with the crankshaft sprocket timing mark.
  8.  
  9. Install the primary chain and sprockets. Tighten the idler sprocket bolt to 25 ft. lbs. (34 Nm).
  10.  
  11. Align the secondary chain single plated links with the timing marks on the secondary sprockets. Align the dot at the L mark on the left sprocket with the plated link on the left chain and the dot at the R mark on the right sprocket with the plated link on the right chain.
  12.  
  13. Rotate the camshafts back from the neutral position and install the camshaft sprockets.
  14.  
  15. Remove the secondary chain locking tool.
  16.  
  17. Remove the primary and secondary timing chain tensioner locking pins.
  18.  
  19. Hold the camshaft sprockets with a spanner wrench and tighten the retaining bolts to 90 ft. lbs. (122 Nm).

    Click image to see an enlarged view

    Fig. Timing cover bolt torque sequence-3.7L and 4.7L engines

  20.  
  21. Install or connect the following:

    Front cover. Tighten the bolts, in sequence, to 40 ft. lbs. (54 Nm).
     
    Front crankshaft seal
     
    Cylinder head access plugs
     
    A/C compressor
     
    Alternator
     
    Accessory drive belt tensioner. Tighten the bolt to 40 ft. lbs. (54 Nm).
     
    Oil fill housing
     
    Crankshaft damper. Tighten the bolt to 130 ft. lbs. (175 Nm).
     
    Power steering pump
     
    Lower radiator hose
     
    Heater hoses
     
    Accessory drive belt
     
    Engine cooling fan and shroud
     
    Camshaft Position (CMP) sensor
     
    Valve covers
     
    Negative battery cable
     

  22.  
  23. Fill and bleed the cooling system.
  24.  
  25. Start the engine, check for leaks and repair if necessary.
  26.  

5.7L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Drive belt
     
    Radiator and cooling fan
     
    Coolant and washer bottles
     
    Fan shroud
     
    A/C compressor
     
    Alternator
     
    Radiator and heater hoses
     
    Tensioner and idler pulleys
     
    Crankshaft damper
     
    Power steering pump
     
    Oil pan and pickup tube
     
    Timing cover
     
    Re-install the damper
     

  6.  
  7. Rotate the crankshaft so that the camshaft sprocket and crankshaft sprocket timing marks are aligned.
    NOTE
    The camshaft pin and slot in the cam sprocket must be a 12 o-clock, the crankshaft keyway must be at 2 o-clock, and the dots or paint on the crank sprocket must be at 6 o-clock.

  8.  
  9. Pin back the tensioner shoe.
  10.  
  11. Remove the timing chain and sprockets.
  12.  

To install:

  1. With the timing marks aligned, wrap the chain around the sprockets. The chain must be installed with the single plated link aligned with the dot or paint on the cam sprocket. The dot or paint on the crank sprocket should be aligned between the 2 plated links.

    Click image to see an enlarged view

    Fig. Timing mark alignment-5.7L engine

  2.  
  3. Install the assembly and torque the cam sprocket bolt to 90 ft. lbs. (122 Nm).
  4.  
  5. Unpin the tensioner and verify the alignment.
  6.  
  7. Install or connect the following:

    Timing cover. Torque all fasteners to 21 ft. lbs. (28 Nm). Torque the large lifting lug to 40 ft. lbs. (55 Nm).
     
    Oil pan and pickup tube
     
    Power steering pump
     
    Crankshaft damper
     
    Tensioner and idler pulleys
     
    Radiator and heater hoses
     
    Alternator
     
    A/C compressor
     
    Fan shroud
     
    Coolant and washer bottles
     
    Radiator fan
     
    Drive belt
     
    Negative battery cable
     

  8.  

5.9L & 6.7L Diesel Engines
Front Cover & Seal
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cables
     
    Accessory drive belt
     
    Cooling fan and shroud
     
    Accessory drive belt tensioner
     
    Oil fill tube and adapter
     
    Crankshaft pulley
     
    Front cover
     
    Front crankshaft seal
     

  4.  

To install:

  1. Install or connect the following:

    Front crankshaft seal
     
    Front cover. Tighten the bolts to 18 ft. lbs. (24 Nm).
     
    Crankshaft pulley
     
    Oil fill tube and adapter. Tighten the bolts to 32 ft. lbs. (43 Nm).
     
    Accessory drive belt tensioner. Tighten the bolts to 32 ft. lbs. (43 Nm).
     
    Cooling fan and shroud
     
    Accessory drive belt. Tighten the crankshaft pulley bolts to 92 ft. lbs. (125 Nm).
     
    Negative battery cables
     

  2.  
  3. Start the engine and check for leaks.
  4.  

Timing Gears
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cables
     
    Accessory drive belt
     
    Cooling fan and shroud
     
    Belt tensioner
     
    Oil fill tube and adapter
     
    Crankshaft pulley
     
    Front cover
     
    Camshaft
     

  4.  
  5. Press the camshaft out of the timing gear.
  6.  

To install:

Click image to see an enlarged view

Fig. Timing gear alignment marks-5.9L diesel engine

  1. Install the camshaft key.
  2.  
  3. Heat the timing gear in an oven to 350°F (177°C) for 45 minutes.
    NOTE
    The camshaft gear will be permanently distorted if overheated. Do not exceed 350°F (177°C).

  4.  
  5. Install the timing gear to the camshaft with the timing marks facing out and the gear seated on the camshaft shoulder.
  6.  
  7. Install or connect the following:

    Camshaft with the timing marks aligned
     
    Front cover. Tighten the bolts to 18 ft. lbs. (24 Nm).
     
    Crankshaft pulley. Tighten the bolt to 92 ft. lbs. (125 Nm).
     
    Oil fill tube and adapter. Tighten the mounting bolts to 32 ft. lbs. (43 Nm).
     
    Belt tensioner. Tighten the mounting bolts to 32 ft. lbs. (43 Nm).
     
    Cooling fan and shroud
     
    Accessory drive belt
     
    Negative battery cables

    Click image to see an enlarged view

    Fig. Remove the gear cover to replace the timing gears-5.9L diesel engine

     

  8.  

 
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