Grand Cherokee 2006-2007

Engine

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Removal & Installation



3.7L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Drain the cooling system.
  6.  
  7. Drain the engine oil.
  8.  
  9. Remove or disconnect the following:

    Negative battery cable
     
    Hood
     
    Air cleaner assembly
     
    Radiator
     
    Electric and mechanical fan assemblies
     
    A/C compressor, if equipped, and secure it out of the way with the lines attached. DO NOT DISCHARGE!
     
    Power steering pump, with the lines attached
     
    Alternator
     
    Coolant bottle
     
    Heater hoses
     
    Accelerator and speed control cables
     
    Lower and upper radiator hoses
     
    Engine ground straps
     
    Intake Air Temperature (IAT) sensor
     
    Fuel injection wiring connectors
     
    Throttle Position (TP) sensor
     
    Idle Air Control (IAC) motor
     
    Oil pressure sender connector
     
    Engine Coolant Temperature (ECT) sensor
     
    Manifold Absolute Pressure (MAP) sensor
     
    Camshaft position sensor
     
    Ignition coil wiring connector
     
    Crankshaft Position (CKP) sensor
     
    Coil pack
     
    Fuel rail
     
    PCV hose
     
    Vacuum hoses from the intake manifold
     
    Knock sensor connectors
     
    Oil dipstick tube
     
    Intake manifold
     
    Heated Oxygen (HO 2 S) sensor connector
     
    Block heater connector
     
    Front drive shaft at the differential
     
    Starter
     
    Structural cover
     
    With a manual transmission, remove the transmission
     
    Torque converter bolts and matchmark the converter
     
    Automatic transmission-to-engine bolts
     
    Exhaust front pipes
     
    Left and right engine mounts
     

  10.  
  11. Place a support stand under the transmission.
  12.  
  13. Install an engine lift plate
  14.  
  15. Lift the engine out of the vehicle.
  16.  

To install:

  1. If equipped with a manual transmission, install the transmission
  2.  
  3. Lower the engine and install the mounts. Don-t tighten the bolts yet.
  4.  
  5. If equipped with an automatic transmission, perform the following steps:
    1. Align the torque converter housing to the engine.
    2.  
    3. Torque the bolts to 30 ft. lbs. (41 Nm).

      Install the torque converter to flexplate bolts. Torque the bolts to 50 ft. lbs. (68 Nm).
       

    4.  

  6.  
  7. Install or connect the following:
    WARNING
    The structural cover must be held tightly against the engine and bell housing during tightening. The torque for all bolts is 40 ft. lbs. (54 Nm); the bolts must be tightened in the order shown.



    Torque the through bolts to 45 ft. lbs. (61 Nm).
     
    Engine ground strap
     
    Starter motor
     
    CKP sensor
     
    Block heater cable
     
    Structural cover.
     



    Click image to see an enlarged view

    Fig. Tighten the structural cover bolts in this order-3.7L



    Exhaust pipes. New flange clamps MUST be used!
     
    HO 2 S sensor connectors
     
    KS sensors
     
    Intake Manifold
     
    Dipstick tube
     
    Vacuum hoses to the intake manifold
     
    PCV and breather hoses
     
    Fuel rail
     
    Ignition coil
     
    IAT sensor
     
    Fuel injector connectors
     
    TP sensor
     
    IAC motor
     
    Oil pressure sender
     
    ECT sensor electrical connector
     
    MAP sensor
     
    CMP sensor
     
    Radiator hoses
     
    Cruise control cable, if equipped
     
    Throttle cable
     
    Heater hoses
     
    Coolant bottle
     
    Power steering pump
     
    Alternator
     
    A/C compressor
     
    Radiator
     
    Fan assemblies
     
    Air cleaner assembly
     
    Negative battery cable
     

  8.  
  9. Fill and bleed the power steering system.
  10.  
  11. Fill the engine with clean oil.
  12.  
  13. Start the engine and check for leaks, repair if necessary.
  14.  

4.7L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Drain the engine oil.
  6.  
  7. Drain the power steering system.
  8.  
  9. Properly relieve the fuel system pressure.
  10.  
  11. Recover the A/C refrigerant.
  12.  
  13. Remove or disconnect the following:

    Negative battery cable
     
    Front fascia
     
    Exhaust crossover pipe
     
    Engine ground straps
     
    Crankshaft Position (CKP) sensor
     
    Structural collar
     
    Starter
     
    Left and right inner fender liners
     
    Headlamp mounting module
     



    Air intake resonator
     
    Accelerator cable
     
    Cruise control cable
     
    Crankcase breather tubes
     
    Accessory drive belt
     
    A/C compressor
     
    Cooling fan assemblies
     
    Radiator hoses
     
    Transmission oil cooler lines
     
    Radiator
     
    A/C condenser
     
    Alternator
     
    Heater hoses
     
    Throttle Position (TP) sensor connector
     
    Intake Air Temperature (IAT) sensor connector
     
    Fuel injector harness connectors
     
    Engine Coolant Temperature (ECT) sensor connector
     
    Idle Air Control (IAC) valve connector
     
    Manifold Absolute Pressure (MAP) sensor connector
     
    Ignition coils
     
    Fuel line
     
    Power steering pump
     
    Oil fill tube
     
    Oil dipstick tube
     
    Heated Oxygen (HO 2 S) sensor connectors
     
    Engine oil filter
     
    Exhaust crossover pipe
     
    Structural cover
     
    Rubber splash shield
     
    Starter motor
     
    Crankshaft Position (CKP) sensor connector
     
    Camshaft Position (CMP) sensor connector
     
    Torque converter
     
    Engine ground straps
     
    Left and right motor mounts
     
    Transmission flange bolts
     

  14.  
  15. Install Engine Lifting Fixture 8347 as shown.

    Click image to see an enlarged view

    Fig. Engine Lifting Fixture-4.7L engine

  16.  
  17. Place a support stand under the transmission.
  18.  
  19. Lift the engine out of the vehicle.
  20.  

To install:

  1. Lower the engine in to the vehicle and position to the transmission.
  2.  
  3. Remove the engine lifting fixture.
  4.  
  5. Install or connect the following:

    Transmission flange bolts. Tighten the bolts to 50 ft. lbs. (68 Nm).
     
    Left and right motor mounts. Tighten the bolts to 45 ft. lbs. (61 Nm).
     
    Engine ground straps
     
    Torque converter. Tighten the bolts to 23 ft. lbs. (31 Nm).
     
    CMP sensor connector
     
    CKP sensor connector
     
    Starter motor
     
    Rubber splash shield
     

  6.  
  7. Install the structural cover as follows:
    1. Install all the bolts finger-tight.
    2.  
    3. Hold the cover tightly against the transmission and the engine.
    4.  
    5. Tighten the bolts in sequence to 40 ft. lbs. (54 Nm).

      Click image to see an enlarged view

      Fig. Structural cover torque sequence-4.7L engine

    6.  

  8.  
  9. Install or connect the following:

    Exhaust crossover pipe
     
    Engine oil filter
     
    HO 2 S sensor connectors
     
    Oil dipstick tube
     
    Oil fill tube
     
    Power steering pump
     
    Fuel line
     
    Ignition coils
     
    MAP sensor connector
     
    IAC valve connector
     
    ECT sensor connector
     
    Fuel injector harness connectors
     
    IAT sensor connector
     
    TP sensor connector
     
    Heater hoses
     
    Alternator
     
    A/C condenser
     
    Radiator
     
    Transmission oil cooler lines
     
    Radiator hoses
     
    Cooling fan assemblies
     
    A/C compressor
     
    Accessory drive belt
     
    Crankcase breather tubes
     
    Cruise control cable
     
    Accelerator cable
     
    Air intake resonator
     
    Headlamp mounting module
     
    Left and right inner fender liners
     
    Front fascia
     
    Negative battery cable
     

  10.  
  11. Fill and bleed the cooling system.
  12.  
  13. Fill and bleed the power steering system.

    Fill the engine with clean oil.
     

  14.  
  15. Recharge the A/C system.
  16.  
  17. Start the