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Home >> Jeep >> 2008 >> Commander Base, 3.7 K, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (4.7L Engine (Service Information)) >> Cylinder Head-Left >> Camshaft - Left >> Removal >> Left Camshaft

Left Camshaft

WARNING: This page is about a different variant/trim than selected.
Fig 1: Cylinder Head Cover-Left
GC0003897Courtesy of CHRYSLER LLC
  1. Remove cylinder head cover (1). See REMOVAL .
    Fig 2: Positioning Secondary Chain Onto Camshaft Drive Gear
    GC0003899Courtesy of CHRYSLER LLC
    1 - LEFT CYLINDER HEAD
    2 - RIGHT CYLINDER HEAD
    CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can occur.
    CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use Special Tool 8350 will result in hydraulic tensioner ratchet over extension, requiring timing chain cover removal to reset the tensioner ratchet.
  2. Set engine to TDC cylinder #1, camshaft sprocket V8 marks at the 12 o'clock position.
  3. Mark one link on the secondary timing chain on both sides of the V8 mark on the camshaft sprocket to aid in installation.
    CAUTION: Do not hold or pry on the camshaft target wheel (Located on the right side camshaft sprocket) for any reason, Severe damage will occur to the target wheel resulting in a vehicle no start condition.
  4. Loosen but DO NOT  remove the camshaft sprocket retaining bolt. Leave the bolt snug against the sprocket.
    Fig 3: Securing Timing Chain Tensioners Using Timing Chain Wedge
    GC0003905Courtesy of CHRYSLER LLC
    1 - LEFT CYLINDER HEAD
    2 - RIGHT CYLINDER HEAD
    3 - LOCKING WEDGE TOOL 9867
    4 - LOCKING WEDGE TOOL 9867
    NOTE: The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners.
    CAUTION: Do not force wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
  5. Position Locking Wedge Tool 9867 (4) timing chain wedge between the timing chain strands, tap the tool to securely wedge the timing chain against the tensioner arm and guide.
    Fig 4: Holding Camshaft With Pliers
    GC0003906Courtesy of CHRYSLER LLC
    1 - CAMSHAFT SPROCKET AND CHAIN
    2 - ADJUSTABLE PLIERS
    3 - CAMSHAFT
    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.
  6. Hold the camshaft (3) with adjustable pliers (2) while removing the camshaft sprocket bolt and sprocket (1).
  7. Using the pliers, gently allow the camshaft to rotate 15° clockwise until the camshaft is in the neutral position (no valve load).
    Fig 5: Camshaft Bearing Caps Bolt Tightening Sequence
    GC0003908Courtesy of CHRYSLER LLC
  8. Starting at the outside working inward, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps.
    CAUTION: DO NOT STAMP OR STRIKE THE CAMSHAFT BEARING CAPS. SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS.
    NOTE: When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
  9. Remove the camshaft bearing caps and the camshaft.