Ram B1500, B2500, B3500, 1999-2003

Timing Chain & Sprockets

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Removal & Installation



3.9L, 5.2L, 5.9L (Gasoline), 8.0L Engines
  1. Remove the timing chain cover. See procedures above.
  2.  
  3. Using the vibration damper bolt, turn the engine until the camshaft sprocket mark is at 6 o'clock and the crankshaft sprocket mark is at 12 o'clock, as shown in the illustration.
  4.  
  5. Remove the camshaft sprocket bolt; take off both sprockets with the timing chain. Sprocket puller may be required on the V-10 crankshaft sprocket.
  6.  
  7. If a tensioner is fitted, replace the crankshaft sprocket, Pry up between sprocket and tensioner with a large screwdriver until the hole in the tensioner shoe lines up with the hole in the bracket. Slip in a pin to keep the tensioner out of the way.
  8.  

To install:

  1. Align the sprocket marks as on removal.
  2.  
  3. Install the chain and sprockets together, ensuring that mark alignment is maintained after installation.
  4.  
  5. Remove the tensioner pin, if installed.
  6.  
  7. Tighten the camshaft sprocket bolt to 50 ft. lbs. (68 Nm) on V-6 and V-8; 45 ft. lbs. (61 Nm) on the V-10.
  8.  



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Fig. View of the camshaft sprocket (1), crankshaft (2), and timing chain (3) with the cover removed-5.2L shown



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Fig. Be sure to maintain proper alignment of the timing marks



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Fig. When a chain tensioner is fitted, use a screwdriver (1) to pry back the tensioner and install a keeper pin (2)

4.7L Engine
  1. Remove the timing chain cover. See procedures above.
  2.  
  3. Remove cylinder head covers. See Procedures above.
  4.  
  5. Rotate engine to line up crankshaft damper mark and TDC mark. Check that camshaft sprocket V8 marks are at 12 o'clock. If not, rotate engine 360- and recheck.
  6.  
  7. Compress and pin the primary chain tensioner.
  8.  
  9. Cover the oil pan opening.
  10.  
  11. remove the secondary chain tensioners.
  12.  
  13. Remove the camshaft position sensor from the right cylinder head.
  14.  
  15. Remove both cam sprocket bolts.
  16.  
  17. Hold the left camshaft steel tube with adjustable pliers and remove the sprocket. Slowly rotate the camshaft about 15- CW to a neutral position.
  18.  
  19. Hold the right camshaft with adjustable pliers and remove the sprocket. Slowly rotate the camshaft about 45- CCW to a neutral position.
  20.  
  21. Remove the idler sprocket assembly bolt.
  22.  
  23. Slide the idler sprocket assembly and crank sprocket forward at the same time to remove the primary and secondary chains.
  24.  
  25. Remove both pivoting tensioner arms and chain guides.
  26.  

To install:

  1. Compress the secondary chain tensioner piston until the piston step is flush with the tensioner body. Using a pin or suitable tool, release the ratchet pawl by pulling the pawl back against spring force through the access hole on the side of the tensioner. While holding the pawl back, push ratchet device to about 0.08 in. (2mm) from the tensioner body. Install special tool 8514 (lock pin) into hole on front of tensioner. Slowly open vise to transfer piston spring force to lock pin.
  2.  
  3. Position primary chain tensioner over oil pump and insert bolts into the lower two holes on tensioner bracket. Tighten bolts to 250 inch lbs. (28 Nm).
  4.  
  5. Install the right side chain tensioner arm. Apply thread-locking compound to torx® bolt and tighten to 150 inch lbs. (17 Nm).
  6.  


NOTE
The silver bolts retain the guides to the cylinder heads and the black bolts retain the guides to the engine block.

  1. Install the left side chain guide. Tighten the bolts to 250 inch lbs. (28 Nm).
  2.  
  3. Install the left side chain tensioner arm. Apply thread locking compound to the Torx® bolt and tighten to 150 inch lbs. (17 Nm).
  4.  


WARNING
Do NOT over-tighten tensioner bolts. Tighten to specified torque only.

  1. Install both secondary chains to idler sprocket. Align two plated links on the secondary chains to be visible through the two lower openings on the idler sprocket (4 o'clock and 8 o'clock). Once the secondary timing chains are installed, position special tool 8515 to hold the chains in place for installation.
  2.  
  3. Align the primary chain double plated links with the timing mark at 12 o'clock on the idler sprocket. Align the primary chain single plated link with the timing mark at 6 o'clock on the crankshaft sprocket.
  4.  
  5. Lube the idler shaft with clean engine oil.
  6.  
  7. Install all chains, crankshaft sprocket and idler sprocket as an assembly. After guiding both secondary chains through the block and cylinder head openings, tie up chains with rubber strap or equivalent to maintain tension.
  8.  



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Fig. Timing chain assembly-4.7L engine



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Fig. Insert a pin to hold the primary chain tensioner-4.7L engine



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Fig. Crankshaft position sensor (1) and camshaft position sensor (3)-4.7L engine


NOTE
It is necessary to rotate the camshafts slightly for sprocket installation.

  1. Align the left cam sprocket L dot with the plated link on the chain.
  2.  
  3. Align the right cam sprocket R dot with the plate link on the chain.
  4.  
  5. Remove excess oil from the cam sprocket bolts to ensure proper torque.
  6.  
  7. Remove special tool (lock pin) 8515. Attach both sprockets to camshafts. Install, but do NOT torque sprocket bolts.
  8.  
  9. verify that all plated links are aligned with marks on all sprocket and that the V8 marks on the sprockets are at 12 o'clock.
  10.  


WARNING
Ensure the plate between the left secondary chain tensioner and block is correctly installed.

  1. Install both secondary chain tensioners and tighten bolts to 21 ft. lbs. (28 Nm).
  2.  
  3. Lubricate the idler sprocket bolt washer with oil and tighten bolt to 25 ft. lbs. (34 Nm).
  4.  
  5. Remove all three locking pins from tensioners. Do NOT manually extend the tensioner ratchets. This will over tension the chains.
  6.  
  7. Prevent the engine from rotating and tighten the camshaft sprocket bolts to 90 ft. lbs. (122 Nm).
  8.  
  9. Rotate the engine two full revolutions. Verify alignment of all timing marks:

    Primary chain idler sprocket: dot at 12 o'clock
     
    Primary chain crankshaft sprocket: dot at 6 o'clock
     
    Secondary chain camshaft sprockets: V8 marks at 12 o'clock
     

  10.  
  11. Lube the chains with clean engine oil.
  12.  
  13. Check idler gear end play. It must be 0.004-0.010 in. (0.10-0.25 mm). If not within spec, replace the idler gear.
  14.  
  15. The remainder of the procedure is the reverse of removal.
  16.  



Click image to see an enlarged view

Fig. Resetting the secondary chain tensioners: vise, insert lock pin (2), ratchet pawl (3), ratchet (4), piston (5)-4.7L engine



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Fig. Installing the timing chains: special tool 8515 (1), primary chain idler sprocket (2), crankshaft sprocket (3)-4.7L engine

 
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