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Home >> Chrysler >> 2021 >> Voyager LXi, Gas >> Repair and Diagnosis >> Engine Mechanical >> Lubrication System >> 3.6L Engine (Service Information) >> Valve Timing >> Chain And Sprockets, Timing >> Removal And Installation >> Removal

Removal And Installation: Removal

CAUTION:

The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.

CAUTION:

When the timing chains are removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve or piston damage.

NOTE:

The Variable Valve Timing (VVT) assemblies (Phasers) and Oil Control Valves (OCVs) can be serviced without removing the engine timing cover.

  1. Remove the spark plugs. Refer to SPARK PLUG, REMOVAL AND INSTALLATION .
  2. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  3. Drain the cooling system. Refer to STANDARD PROCEDURE .
  4. If removing the oil pump chain or primary chain, remove the oil pan. Refer to PAN, OIL, REMOVAL AND INSTALLATION .
  5. Remove the engine timing cover. Refer to COVER(S), ENGINE TIMING, REMOVAL AND INSTALLATION .
    NOTE:

    Take this opportunity to measure timing chain wear. Refer to VALVE TIMING, STANDARD PROCEDURE .

    GC0173591Courtesy of CHRYSLER GROUP, LLC
    CAUTION:

    When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve or piston damage.

  6. Rotate the crankshaft clockwise (as viewed from the front) to place the number one cylinder piston at top-dead-center on the exhaust stroke by aligning the dimple (7) on the crankshaft with the block/bearing cap junction (6).
  7. While maintaining this alignment, verify that the ARROWS  (4) on the left side camshaft phasers point toward each other and are parallel to the cylinder head cover mounting surface (3) and that the right side camshaft phaser ARROWS  (5) point away from each other and the SCRIBE LINES  (7) are parallel to the cylinder head cover mounting surface (2).
    GC0207766Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    The phaser markings (1 and 3) could align with either an external or internal chain link. Either alignment is acceptable as long as there are twelve chain pins between the markings.

  8. There should be twelve chain pins (2) BETWEEN  the exhaust camshaft phaser triangle marking (1) and the intake camshaft phaser circle marking (3) as viewed from either the front or rear of the camshaft phasers.
    CAUTION:

    Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.

    GC0173721Courtesy of CHRYSLER GROUP, LLC
  9. Both left and right side camshafts should be at top-dead-center, with the alignment holes (1) positioned vertically.
    NOTE:

    It may be necessary to rock the camshaft slightly (a few degrees) with a wrench (2) when installing the camshaft holder.

    GC0173682Courtesy of CHRYSLER GROUP, LLC
  10. Install the (special tool #2025200090, Holder, Camshaft) (1) on both left and right side camshafts.
  11. Mark the direction of rotation on the following timing chains using a paint pen or equivalent to aid in reassembly:
    • Left side timing chain
    • Right side timing chain
    • Oil pump chain
    • Primary chain
    GC0173630Courtesy of CHRYSLER GROUP, LLC
  12. Reset the right side timing chain tensioner by pushing back the tensioner piston and installing Tensioner Pin (special tool #8514A, Pins, Tensioner) (1).
    GC0144145Courtesy of CHRYSLER GROUP, LLC
  13. Reset the left side timing chain tensioner by lifting the pawl (1), pushing back the piston (2) and installing Tensioner Pin (special tool #8514A, Pins, Tensioner) (3)

    Refer to VALVE TIMING, STANDARD PROCEDURE .

    GC0173669Courtesy of CHRYSLER GROUP, LLC
  14. Disengage the oil pump chain tensioner spring (3) from the dowel pin (2) and remove the oil pump chain tensioner (1).
  15. Remove the oil pump sprocket retaining bolt (4) and remove the oil pump sprocket (5) and oil pump chain (6).
    GC0173749Courtesy of CHRYSLER GROUP, LLC
  16. Install the (special tool #2025102090, Holder, Camshaft Phaser - Right-Rear Cyl Head) (2) between the right side intake and exhaust phasers (1), with the tool number facing up.
    GC0173566Courtesy of CHRYSLER GROUP, LLC
  17. Loosen, but do not remove, the right side exhaust oil control valve (1).
    GC0173641Courtesy of CHRYSLER GROUP, LLC
  18. Loosen, but do not remove, the right side intake oil control valve (1).
  19. Remove the (special tool #2025102090, Holder, Camshaft Phaser - Right-Rear Cyl Head).
  20. Remove the oil control valve from the right side intake camshaft phaser.
  21. Pull the right side intake camshaft phaser off of the camshaft and remove the right side timing chain.
  22. If required, remove the oil control valve and pull the right side exhaust camshaft phaser off of the camshaft.
    GC0173776Courtesy of CHRYSLER GROUP, LLC
  23. Install the (special tool #2025101090, Holder, Camshaft Phaser - Left-Front Cyl Head) (2) between the intake and exhaust phasers (1), with the tool number facing up.
    GC0173626Courtesy of CHRYSLER GROUP, LLC
  24. Loosen, but do not remove, the left side exhaust oil control valve (1).
    GC0173575Courtesy of CHRYSLER GROUP, LLC
  25. Loosen, but do not remove, the left side intake oil control valve (1).
  26. Remove the (special tool #2025101090, Holder, Camshaft Phaser - Left-Front Cyl Head), leaving the Camshaft Holder in place.
  27. Remove the oil control valve from the left side exhaust camshaft phaser.
  28. Pull the left side exhaust camshaft phaser off of the camshaft and remove the left side timing chain.
  29. If required, remove the oil control valve and pull the left side intake camshaft phaser off of the camshaft.
    GC0173808Courtesy of CHRYSLER GROUP, LLC
  30. Reset the primary chain tensioner (2) by pushing back the tensioner piston and installing Tensioner Pin (special tool #8514A, Pins, Tensioner) (3). Remove the two bolts (1) and remove the primary chain tensioner.
    GC0144141Courtesy of CHRYSLER GROUP, LLC
  31. Remove the idler sprocket retaining bolt (2) and washer (3).
  32. Remove the primary chain, idler sprocket and crankshaft sprocket as an assembly.
    GC0144140Courtesy of CHRYSLER GROUP, LLC
  33. If required, remove the two bolts (6) and the left side timing chain tensioner (5).
  34. If required, remove the two bolts (4) and the left side timing chain guide (2) and tensioner arm (1).
    GC0144139Courtesy of CHRYSLER GROUP, LLC
  35. If required, remove the two bolts (4) and the right side timing chain tensioner (3).
  36. If required, remove the three bolts (2) and the right side timing chain guide (1) and tensioner arm (6).
  37. Inspect all sprockets and chain guides. Replace if damaged.
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