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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (4.7L Engine (Service Information)) >> Valve Timing >> Standard Procedure >> Engine Timing Verification >> Single Camshaft Timing

Single Camshaft Timing

WARNING: This page is about a different variant/trim than selected.
NOTE: To adjust the timing on one camshaft, perform the following procedure.
Fig 1: Securing Timing Chain Tensioners Using Timing Chain Wedge
GC0082886Courtesy of CHRYSLER LLC
1 - LEFT CYLINDER HEAD
2 - RIGHT CYLINDER HEAD
3 - SPECIAL TOOL 9867 WEDGE
4 - SPECIAL TOOL 9867 WEDGE
  1. Using Chain Tensioner Wedge, special tool 9867 (3), stabilize the secondary chain drive. For reference purposes, mark the chain-to-sprocket position.
  2. Remove the camshaft drive gear retaining bolt.
  3. Carefully remove the camshaft drive gear from the camshaft.
  4. Re-index the camshaft drive gear in the chain until the V8 mark is at the same position as the V8 mark on the opposite camshaft drive gear.
    Fig 2: Camshaft Dowel
    GC0082841Courtesy of CHRYSLER LLC
    1 - ADJUSTABLE PLIERS
    2 - CAMSHAFT DOWEL
    NOTE: When gripping the camshaft, place the pliers on the tube portion of the camshaft only. Do not grip the lobes or the sprocket areas.
  5. Using a suitable pair of adjustable pliers (1), rotate the camshaft until the alignment dowel (2) on the camshaft is aligned with the slot in the camshaft drive gear.
    Fig 3: Camshaft Sprocket Left Cylinder Head
    GC0082842Courtesy of CHRYSLER LLC
    1 - TORQUE WRENCH
    2 - CAMSHAFT SPROCKET
    3 - LEFT CYLINDER HEAD
    4 - SPANNER WRENCH 6958 WITH ADAPTER PINS 8346
    Fig 4: Camshaft Sprocket Installation-Right Cylinder Head
    GC0082844Courtesy of CHRYSLER LLC
    1 - TORQUE WRENCH
    2 - SPANNER WRENCH 6958 WITH ADAPTER PINS 8346
    3 - LEFT CAMSHAFT SPROCKET
    4 - RIGHT CAMSHAFT SPROCKET
    CAUTION: Remove excess oil from camshaft sprocket retaining bolt before reinstalling bolt. Failure to do so may cause over-torqueing of bolt resulting in bolt failure.
  6. Position the camshaft drive gear onto the camshaft, remove oil from bolt then install the retaining bolt. Using Special Tools, Spanner Wrench 6958 with Adapter Pins 8346 and a suitable torque wrench (1), Tighten retaining bolt to 122 N.m (90 ft. Lbs.).
    Fig 5: Securing Timing Chain Tensioners Using Timing Chain Wedge
    GC0082886Courtesy of CHRYSLER LLC
    1 - LEFT CYLINDER HEAD
    2 - RIGHT CYLINDER HEAD
    3 - SPECIAL TOOL 9867 WEDGE
    4 - SPECIAL TOOL 9867 WEDGE
  7. Remove special tool 9867(3,4).
    Fig 6: Camshaft Sprocket V8 Marks
    GC0092071Courtesy of CHRYSLER LLC
    1 - LEFT CYLINDER HEAD
    2 - RIGHT CYLINDER HEAD
  8. Rotate the crankshaft two full revolutions, then re-verify that the camshaft drive gear V8 marks are in fact aligned.
  9. Install the cylinder head covers. See Engine/Cylinder Head/COVER(S), Cylinder Head - Installation .
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