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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (3.2L Engine (Service Information)) >> Cylinder Head >> Removal >> Left Cylinder Head

Left Cylinder Head

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
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.

  1. Perform the fuel system pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE PROCEDURE .
  2. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  3. Remove the belly pan. Refer to BELLY PAN, REMOVAL .
  4. Drain the cooling system. Refer to DRAINING, COOLANT .
  5. Drain the engine oil. Refer to STANDARD PROCEDURE  .
  6. Lower the vehicle.
    GC0159742Courtesy of CHRYSLER GROUP, LLC
  7. Remove the engine cover (1).
  8. Recover the refrigerant from the A/C system. Refer to PLUMBING, STANDARD PROCEDURE .
  9. Remove the air cleaner body. Refer to BODY, AIR CLEANER, REMOVAL .
  10. Remove the air cleaner resonator. Refer to RESONATOR, AIR CLEANER, REMOVAL .
  11. Remove the upper and lower intake manifolds and insulator. Refer to MANIFOLD, INTAKE, REMOVAL .
  12. Remove the spark plugs. Refer to SPARK PLUG, REMOVAL, 3.2L .
  13. Remove the PCM. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL, 3.2L .
    GC0169778Courtesy of CHRYSLER GROUP, LLC
  14. Disconnect the Engine Coolant Temperature (ECT) sensor harness connector (1).
    GC0154074Courtesy of CHRYSLER GROUP, LLC
  15. Disconnect the ignition coil capacitor harness connector (1).
    GC0144404Courtesy of CHRYSLER GROUP, LLC
  16. Disconnect the main harness from the engine injection/ignition harness (1) at the rear of the left cylinder head.
  17. Disconnect the main harness from the engine oil pressure/temperature harness (2) at the rear of the left cylinder head.
  18. Remove the thermostat housing assembly. Refer to THERMOSTAT, REMOVAL, 3.2L .
  19. Remove the engine timing cover. Refer to COVER(S), ENGINE TIMING .
  20. Remove the generator. Refer to GENERATOR, REMOVAL .
    CAUTION:

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

    GC0144142Courtesy of CHRYSLER GROUP, LLC
  21. Rotate the crankshaft clockwise 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.

  22. Mark the direction of rotation on the timing chain using a paint pen or equivalent to aid in reassembly.
    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 or piston damage.

  23. 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  .
    GC0144164Courtesy of CHRYSLER GROUP, LLC
    NOTE:

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

  24. Install the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  25. Loosen the intake oil control valve (6) and exhaust oil control valve (2).
  26. Remove the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  27. Remove the oil control valve (2) from the left side exhaust cam phaser and pull the phaser off of the camshaft.
  28. Remove the oil control valve (6) from the left side intake cam phaser and pull the phaser off of the camshaft.
    GC0144140Courtesy of CHRYSLER GROUP, LLC
  29. Remove the LH cam chain tensioner arm (1).
  30. Remove two T30 bolts (6) and the LH cam chain tensioner (5).
  31. Remove two T30 bolts (4) and the LH cam chain guide (2).
    Fig 1: Cylinder Head Retaining Bolt Removal Sequence - Left
    GC0144167Courtesy of CHRYSLER GROUP, LLC
  32. 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.

  33. 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.

  34. If required, remove the hydraulic lifters. Refer to LIFTER(S), HYDRAULIC, REMOVAL .
    CAUTION:

    DO NOT use an impact gun or any type of power tools to break loose or remove the head bolts. This can cause the threads to pull out of the block with the bolts.

  35. Using the sequence shown in illustration, remove the cylinder head retaining bolts.
    GC0144308Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Right head gasket shown, 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.

    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.

  36. Remove the cylinder head and gasket (1). Discard the gasket.
    GC0169778Courtesy of CHRYSLER GROUP, LLC
  37. If required, remove the Engine Coolant Temperature (ECT) sensor (2).
  38. If required, remove the ignition coil capacitor and the engine wire harness retainer bracket.
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