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

Cover(S), Cylinder Head: Removal: Left

Fig 1: Magnetic Timing Wheels
GC0144158Courtesy 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: Upper Intake Manifold & Fasteners
GC0154013Courtesy of CHRYSLER GROUP, LLC
  1. Disconnect and isolate the negative battery cable.
  2. Remove the air cleaner body and upper intake manifold (2). Refer to MANIFOLD, INTAKE, REMOVAL .
    Fig 3: Intake Ports, Insulator & Alignment Posts
    GC0144184Courtesy of CHRYSLER GROUP, LLC
  3. Cover the open intake ports (1) to prevent debris from entering the engine.
  4. Remove the insulator (2) from the LH cylinder head cover.
    Fig 4: Retainers, A/C Compressor Electrical Connector & Left Intake And Left Exhaust Variable Valve Timing Solenoid Electrical Connectors
    GC0154026Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Mark the variable valve timing solenoid connectors (3 and 4) with a paint pen or equivalent so that they may be reinstalled in their original locations.

  5. Disconnect the A/C compressor electrical connector (2).
  6. Disconnect the left exhaust variable valve timing solenoid electrical connector (4).
  7. Disconnect the left intake variable valve timing solenoid electrical connector (3).
  8. Disengage three wire harness retainers (1) from the left cylinder head cover.
    Fig 5: Camshaft Position (CMP) Sensor, Retainer & Engine Coolant Temperature (ECT) Sensor Connector
    GC0154027Courtesy of CHRYSLER GROUP, LLC
  9. Disconnect the Engine Coolant Temperature (ECT) sensor connector (3).
  10. Disconnect the left Camshaft Position (CMP) sensor (1).
  11. Disengage the main wire harness retainer (2) from the cylinder head cover mounting stud.
    Fig 6: Variable Valve Timing Solenoids, Connectors & Bolts
    GC0144208Courtesy of CHRYSLER GROUP, LLC
  12. Mark the variable valve timing solenoids (2 and 4) with a paint pen or equivalent so that they may be reinstalled in their original locations.
  13. Remove the variable valve timing solenoids
    Fig 7: CMP Sensor & Bolt
    GC0144205Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    The RH CMP sensor is shown in illustration, the LH CMP sensor is similar. If removing both RH and LH CMP sensors, mark the sensors so they can be installed in their original locations.

  14. Remove the camshaft position sensor. Refer to SENSOR, CAMSHAFT POSITION, 3.6L, REMOVAL .
    Fig 8: Injection/Ignition Harness Retainers
    GC0144460Courtesy of CHRYSLER GROUP, LLC
  15. Disengage two injection/ignition harness retainers (1) from the left cylinder head cover.
    Fig 9: Electrical Connector, Ignition Coils & Ignition Coil Retaining Bolts
    GC0144206Courtesy of CHRYSLER GROUP, LLC
  16. Remove the ignition coils (2). Refer to COIL, IGNITION, REMOVAL .
    Fig 10: Cylinder Head Cover Mounting Bolts & Studbolts
    GC0144198Courtesy of CHRYSLER GROUP, LLC
  17. Loosen ten cylinder head cover mounting bolts (1) and two studbolts (2) and remove the cylinder head cover.
    Fig 11: Cylinder Head Cover Gasket & Spark Plug Tube Seals
    GC0144274Courtesy of CHRYSLER GROUP, LLC
  18. Remove and discard the cylinder head cover gasket (1).
  19. The spark plug tube seals (2) can be reused if not damaged.
    Fig 12: Residual Sealant
    GC0144275Courtesy of CHRYSLER GROUP, LLC
    CAUTION:

    Do not use oil based liquids, wire brushes, abrasive wheels or metal scrapers to clean the engine gasket surfaces. Use only isopropyl (rubbing) alcohol, along with plastic or wooden scrapers. Improper gasket surface preparation may result in engine fluid leakage.

  20. Remove all residual sealant (1) from the cylinder head, timing chain cover and cylinder head cover mating surfaces. Refer to ENGINE GASKET SURFACE PREPARATION  .