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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (3.6L Engine (Service Information)) >> Cylinder Head >> Removal >> Left

Cylinder Head: Removal: Left

WARNING: This page is about a different variant/trim than selected.
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 1: Magnetic Timing Wheels
GC0144190Courtesy of CHRYSLER GROUP, LLC
Fig 2: Negative Battery Cable
GC0139402Courtesy 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 (1).
    Fig 3: Engine Cover
    GC0144028Courtesy of CHRYSLER GROUP, LLC
  3. Lift the engine cover retaining grommets off the ball studs and remove the engine cover (1).
    Fig 4: Inlet Air Temperature (IAT) Sensor Electrical Connector, Air Inlet Hose Assembly & Fasteners
    GC0144029Courtesy of CHRYSLER GROUP, LLC
  4. Disconnect the electrical connector (1) from the Inlet Air Temperature (IAT) sensor.
  5. Loosen the clamp (2) at the throttle body.
  6. Loosen the clamp (3) at the air cleaner housing.
  7. Lift the air inlet hose assembly retaining grommet off the ball stud (4).
  8. Remove the air inlet hose assembly (5).
    Fig 5: Fresh Air Makeup Hose, Air Cleaner Housing & Bolt
    GC0144030Courtesy of CHRYSLER GROUP, LLC
  9. Disconnect the fresh air makeup hose (1) from the air cleaner housing.
  10. Remove the air cleaner housing retaining bolt (2).
  11. Remove the air cleaner housing (3).
    Fig 6: Fresh Air Makeup Hose At Rear Of Intake Manifold
    GC0144653Courtesy of CHRYSLER GROUP, LLC
  12. Remove the fresh air makeup hose (2) from the rear of the intake manifold (1).
    Fig 7: Idler Pulley, Tensioner Arm, Belt, Idler, Tensioner & Belt
    GC0144013Courtesy of CHRYSLER GROUP, LLC
  13. Rotate the accessory drive belt tensioner (7) counterclockwise until it contacts the stop and remove the accessory drive belt (3), then slowly rotate the tensioner into the freearm position.
    Fig 8: Lower Splash Shield & Fasteners
    GC0095584Courtesy of CHRYSLER GROUP, LLC
  14. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  15. Remove the belly pan retainers (1) and remove the belly pan.
  16. Drain the cooling system. Refer to STANDARD PROCEDURE .
  17. Drain the engine oil. Refer to Engine/Lubrication/OIL - Standard Procedure .
    Fig 9: Lower Heater Core Return Hose & Lower Radiator Hose
    GC0144660Courtesy of CHRYSLER GROUP, LLC
  18. Remove the lower heater core return hose (1) from the engine coolant pump housing.
    Fig 10: Heater Core Return Tube Lower Support Bracket Retaining Nut
    GC0144661Courtesy of CHRYSLER GROUP, LLC
  19. Remove the heater core return tube lower support bracket retaining nut (1).
    Fig 11: A/C Compressor Electrical Connector & Wire Harness Retainer
    GC0144411Courtesy of CHRYSLER GROUP, LLC
  20. Disconnect the A/C compressor electrical connector (1) and disengage the wire harness retainer (2) from the A/C compressor discharge line.
    Fig 12: A/C Compressor, Nut, Stud & Three Bolts
    GC0144012Courtesy of CHRYSLER GROUP, LLC
  21. Remove the A/C compressor lower retaining studs (3).
  22. Lower the vehicle.
  23. Remove the A/C compressor upper retaining bolts (1) and reposition the A/C compressor aside (2).
    Fig 13: Coolant Bottle Return Hose
    GC0144662Courtesy of CHRYSLER GROUP, LLC
  24. Remove the coolant bottle return hose (1).
    Fig 14: Heater Core Purge Hose, Coolant Bottle Retaining Bolts & Coolant Bottle
    GC0144663Courtesy of CHRYSLER GROUP, LLC
  25. Remove the heater core purge hose (1) from the coolant bottle.
  26. Remove the coolant bottle retaining bolts (2).
  27. Remove the coolant bottle (3).
    Fig 15: Heater Core Return Hose
    GC0144664Courtesy of CHRYSLER GROUP, LLC
  28. Disconnect the heater core return hose (1).
    Fig 16: Heater Core Return Tube Upper Support Bracket Retaining Nut & Tube
    GC0144665Courtesy of CHRYSLER GROUP, LLC
  29. Remove the heater core return tube upper support bracket retaining nut (2) and remove the tube (1).
    Fig 17: Upper Intake Manifold & Bolts
    GC0144183Courtesy of CHRYSLER GROUP, LLC
  30. Remove the upper and lower intake manifolds (2) and insulator. Refer to MANIFOLD, INTAKE, REMOVAL .
    Fig 18: Left Upstream Oxygen Sensor Electrical Connector & Down Pipe Flange Bolts
    GC0144668Courtesy of CHRYSLER GROUP, LLC
  31. Disconnect the left upstream oxygen sensor electrical connector (1) from the main wire harness.
  32. Loosen the lower down pipe flange bolts (2).
  33. Remove the upper down pipe flange bolts (3) and position the down pipe and catalytic converter aside.
    Fig 19: ECT Sensor Connector, CMP Sensor & Main Wire Harness Retainers
    GC0144416Courtesy of CHRYSLER GROUP, LLC
  34. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector (3).
    Fig 20: Injection/Ignition Electrical Connector & Engine Oil Pressure/Temperature Sensor Electrical Connector
    GC0144449Courtesy of CHRYSLER GROUP, LLC
  35. Disconnect the ignition coil capacitor electrical connector.
  36. Disconnect the injection/ignition electrical connector (1).
  37. Disconnect the engine oil pressure/temperature sensor electrical connector (3).
  38. Unfasten the injection/ignition wire harness and the oil pressure/temperature sensor wire harness from the retainer bracket (2) on the rear of the left cylinder head.
    Fig 21: Starter Wire Harness Retainers, Main Wire Harness Retainer & Manifold Support Bracket Retainers
    GC0144415Courtesy of CHRYSLER GROUP, LLC
  39. Unfasten two starter wire harness retainers (1) from the upper intake manifold support brackets.
  40. Unfasten one main wire harness retainer (3) from the left cylinder head cover and two retainers (2) from the upper intake manifold support brackets.
    Fig 22: Left Intake Manifold Support Brackets & Retaining Bolts
    GC0144406Courtesy of CHRYSLER GROUP, LLC
  41. Remove the bolts (2) and remove the left upper intake manifold support brackets (1).
    Fig 23: Electrical Connector, Ignition Coils & Ignition Coil Retaining Bolts
    GC0144206Courtesy of CHRYSLER GROUP, LLC
  42. Remove the ignition coils (2). Refer to COIL, IGNITION, REMOVAL .
  43. Remove the cylinder head covers, lower and upper oil pans, 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 Engine/Valve Timing - Standard Procedure .

    Fig 24: 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.

  44. 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.

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

    Fig 25: Resetting Left Cam Chain Tensioner
    GC0144145Courtesy of CHRYSLER GROUP, LLC
  46. Reset the left 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 Engine/Valve Timing - Standard Procedure .
    Fig 26: 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.

  47. Install the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  48. Loosen both the intake oil control valve (6) and exhaust oil control valve (2).
  49. Remove the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (4).
  50. Remove the oil control valve (2) from the left side exhaust cam phaser and pull the phaser off of the camshaft.
  51. Remove the oil control valve (6) from the left side intake cam phaser and pull the phaser off of the camshaft.
    Fig 27: Left Cam Chain Tensioner, Arm, Guide & Bolts
    GC0144140Courtesy of CHRYSLER GROUP, LLC
  52. Remove the left cam chain tensioner arm (1).
  53. Remove two T30 bolts (6) and the left cam chain tensioner (5).
  54. Remove two T30 bolts (4) and the left cam chain guide (2).
    Fig 28: Cylinder Head Retaining Bolt Removal Sequence - Left
    GC0144167Courtesy of CHRYSLER GROUP, LLC
  55. 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.

  56. 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.

  57. If required, remove the hydraulic lifters. Refer to LIFTER(S), HYDRAULIC, REMOVAL .
  58. Using the sequence shown in illustration, remove the cylinder head retaining bolts.
    Fig 29: 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.

    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.

    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.

  59. Remove the cylinder head and gasket (1) and discard the gasket.
    Fig 30: ECT Sensor, Ignition Coil Capacitor, Engine Wire Harness Retainer Bracket & Bolts
    GC0144448Courtesy of CHRYSLER GROUP, LLC
  60. If required, remove the Engine Coolant Temperature (ECT) sensor (4).
  61. If required, remove the bolt (2) and the ignition coil capacitor (1).
  62. If required, remove the bolt (3) and the engine wire harness retainer bracket (5).