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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.6L Engine (Service Information) >> Cylinder Head >> Removal >> Left

Cylinder Head: Removal: Left

Fig 1: Magnetic Timing Wheels
GC0144190Courtesy of CHRYSLER GROUP, LLC
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.

Fig 2: Engine Cover
GC0153999Courtesy of CHRYSLER GROUP, LLC
  1. Perform the fuel pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE .
  2. Disconnect and isolate the negative battery cable.
  3. Remove the engine cover (1).
    Fig 3: Air Cleaner Body, Fresh Air Makeup Hose, Electrical Connector, Clamp, Bolts & Retainers
    GC0154000Courtesy of CHRYSLER GROUP, LLC
  4. Remove the air cleaner body (1). Refer to BODY, AIR CLEANER, REMOVAL .
    Fig 4: Upstream & Downstream Oxygen Sensors & Bolts
    GC0153991Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Right catalytic converter shown in illustration, left catalytic converter similar.

  5. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  6. Drain the cooling system. Refer to STANDARD PROCEDURE .
  7. Drain the engine oil. Refer to STANDARD PROCEDURE  .
  8. Disconnect the left upstream (3) and downstream (1) oxygen sensor connectors from the main wire harness.
  9. Remove the left catalytic converter. Refer to CONVERTER, CATALYTIC, REMOVAL .
    Fig 5: Upper Intake Manifold & Fasteners
    GC0154013Courtesy of CHRYSLER GROUP, LLC
  10. Lower the vehicle.
  11. Remove the upper and lower intake manifolds (2) and insulator. Refer to MANIFOLD, INTAKE, REMOVAL .
    Fig 6: Drive Belt Tensioners & Assembly With Drive Belt
    GC0153982Courtesy of CHRYSLER GROUP, LLC
  12. Remove the right and left cylinder head covers. Refer to COVER(S), CYLINDER HEAD, REMOVAL .
  13. Remove the accessory drive belt (7). Refer to BELT, SERPENTINE, REMOVAL .
    Fig 7: A/C Compressor & Mounting Bolts
    GC0153970Courtesy of CHRYSLER GROUP, LLC
  14. Remove the four bolts (1) and reposition the A/C compressor (2).
    Fig 8: Ignition Coil Capacitor Electrical Connector
    GC0154073Courtesy of CHRYSLER GROUP, LLC
  15. Disconnect the ignition coil capacitor electrical connector (1).
    Fig 9: Left Rear Upper Intake Manifold Support Bracket & Studbolts
    GC0154056Courtesy of CHRYSLER GROUP, LLC
  16. Remove the two studbolts (3) and remove the left rear upper intake manifold support bracket (1).
    Fig 10: Piston Extension & Right Hand Cam Chain Tensioner
    GC0144234Courtesy of CHRYSLER GROUP, LLC
  17. Remove the spark plugs. Refer to SPARK PLUG, REMOVAL .
  18. Remove the upper oil pan, crankshaft vibration damper and engine timing cover. Refer to COVER(S), ENGINE TIMING, REMOVAL .
    NOTE:

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

  19. Lower the vehicle.
    Fig 11: Rotating Crankshaft Clockwise To Position No. 1 Piston At TDC On Exhaust Stroke
    GC0144142Courtesy of CHRYSLER GROUP, LLC
    CAUTION:

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

  20. Rotate the crankshaft CW to place the number one piston at TDC on the exhaust stroke by aligning the dimple (4) on the crankshaft with the block/bearing cap junction (5). The left side cam phaser arrows (2) should point toward each other and be parallel to the valve cover sealing surface (3). The right side cam phaser arrows (7) should point away from each other and the scribe lines (9) should be parallel to the valve cover sealing surface (8).
    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.

  21. Mark the direction of rotation on the timing chain using a paint pen or equivalent to aid in reassembly.
    Fig 12: Resetting Left Cam Chain Tensioner By Lifting Pawl, Pushing Back Piston & Installing Tensioner Pin
    GC0144145Courtesy of CHRYSLER GROUP, LLC
    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 and/or piston damage.

  22. Reset the LH cam chain tensioner by lifting the pawl (1), pushing back the piston (2) and installing Tensioner Pin (special tool #8514, Pins, Tensioner) (3).

    Refer to STANDARD PROCEDURE  .

    Fig 13: Phaser Timing Marks, Oil Control Valves & LH Camshaft Phaser Lock
    GC0144164Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser lock.

  23. Install the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  24. Loosen both the intake oil control valve (6) and exhaust oil control valve (2).
  25. Remove the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  26. Remove the oil control valve (2) from the left side exhaust cam phaser and pull the phaser off of the camshaft.
  27. Remove the oil control valve (6) from the left side intake cam phaser and pull the phaser off of the camshaft.
    Fig 14: Left Cam Chain Tensioner, Arm, Guide & Bolts
    GC0144140Courtesy of CHRYSLER GROUP, LLC
  28. Remove the LH cam chain tensioner arm (1).
  29. Remove two T30 bolts (6) and the LH cam chain tensioner (5).
  30. Remove two T30 bolts (4) and the LH cam chain guide (2).
    Fig 15: Cylinder Head Retaining Bolt Removal Sequence - Left
    GC0144167Courtesy of CHRYSLER GROUP, LLC
  31. Remove the left camshafts. Refer to CAMSHAFT, ENGINE, REMOVAL .
    NOTE:

    If the rocker arms are to be reused, identify their positions so that they can be reassembled into their original locations.

  32. Remove the rocker arms. Refer to ROCKER ARM, VALVE, REMOVAL .
    NOTE:

    If the hydraulic lifters are to be reused, identify their positions so that they can be reassembled into their original locations.

  33. If required, remove the hydraulic lifters. Refer to LIFTER(S), HYDRAULIC, REMOVAL .
  34. Using the sequence shown in illustration, remove the cylinder head retaining bolts.
    Fig 16: Head Gasket & Locating Dowels
    GC0144308Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Right head gasket shown in illustration, left head gasket similar.

    WARNING:

    The multi-layered steel head gaskets have very sharp edges that could cause personal injury if not handled carefully.

    NOTE:

    The head gasket (1) crimps the locating dowels (2) and the dowels may pull out of the engine block when the head gasket is removed.

  35. Remove the cylinder head and gasket (1). Discard the gasket.
    CAUTION:

    Do not lay the cylinder head on its gasket sealing surface, due to the design of the cylinder head gasket, any distortion to the cylinder head sealing surface may prevent the gasket from properly sealing resulting in leaks.

    Fig 17: Ignition Coil Capacitor, Bolt & Engine Coolant Temperature (ECT) Sensor
    GC0154072Courtesy of CHRYSLER GROUP, LLC
  36. If required, remove the Engine Coolant Temperature (ECT) sensor (3).
  37. If required, remove the bolt (2) and the ignition coil capacitor (1).
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