2012 Jeep Wrangler JK Factory Service Manual 09 - Engine, 3.6L

REMOVAL

REMOVAL

Special Tools: Click to display a list of tools used in this procedure

CAUTION:

If the original engine has experienced a catastrophic failure or an individual failure with the piston, cylinder bore, engine block, valve or valve seat, the intake manifold MUST be replaced with a new manifold.


  1. Perform the fuel pressure release procedure (Refer to 14 - Fuel System/Fuel Delivery - Standard Procedure) .

  2.  
  3. Disconnect and isolate the negative battery cable.

  4.  
  5. Remove the engine cover (1).


  6.  
  7. Remove the air cleaner body (1) (Refer to 09 - Engine/Air Intake System/BODY, Air Cleaner - Removal) .


  8.  
  9. If equipped with a manual transmission, remove the shift lever (2) (Refer to 21 - Transmission and Transfer Case/Manual/LEVER, Shift - Removal) .


  10.  
  11. Remove the battery, Totally Integrated Power Module (TIPM) and battery tray (4) (Refer to 08 - Electrical/8F - Engine Systems/Battery System/TRAY, Battery - Removal) .


  12.  
  13. Raise and support the vehicle (Refer to 04 - Vehicle Quick Reference/Hoisting - Standard Procedure) .

  14.  
  15. Drain the cooling system (Refer to 07 - Cooling - Standard Procedure) .

  16.  
  17. If required, drain the engine oil (Refer to 09 - Engine/Lubrication/OIL - Standard Procedure) .

  18.  
  19. Remove the front wheelhouse inner splash shields (Refer to 23 - Body/Exterior/SHIELD, Splash - Removal) .

  20.  
  21. Disconnect the main wire harness from the Crankshaft Position (CKP) sensor (5).

  22.  
  23. Disengage one main wire harness retainer (4) from the engine block and one main wire harness retainer (3) from the oil level indicator.

  24.  
  25. Remove the bolt (2) and ground strap (1) from the engine block.


  26.  
  27. Disconnect the oil pump solenoid electrical connector (1).

  28.  
  29. Disengage one wire harness retainer (2) from the engine block, one wire harness retainer (3) from the power steering pump mounting bracket and one wire harness retainer (4) from the right engine mount.
    .


    NOTE:

    Right catalytic converter shown, left catalytic converter similar.


  30.  
  31. Disconnect the right and left upstream (3) and downstream (1) oxygen sensor connectors from the main wire harness.

  32.  
  33. Remove the right and left catalytic converters (Refer to 11 - Exhaust System/CONVERTER, Catalytic - Removal) .


  34.  
  35. Lower the vehicle.

  36.  
  37. Remove the upper radiator hose (1) from the engine thermostat housing.


  38.  
  39. Remove the heater core supply hose (1) from the heater core tube assembly.

  40.  
  41. Remove the heater core return hose (2) from the heater core tube assembly.

  42.  
  43. Remove the lower radiator hose (3) from the engine coolant pump housing.


  44.  
  45. Remove the heater core supply hose (2), heater core return hose (1) and oil cooler return hose (4) from the heater core tube assembly.

  46.  
  47. Remove two nuts (3) and the heater core tube assembly from the right upper intake manifold support bracket.


  48.  
  49. Remove the upper intake manifold (2) and insulator (Refer to 09 - Engine/Manifolds/MANIFOLD, Intake - Removal)


  50.  
  51. Disconnect the fuel supply hose (2) from the fuel rail (Refer to 14 - Fuel System/Fuel Delivery/FITTING, Quick Connect - Standard Procedure)


  52.  
  53. Remove the PCV hose (1) from the PCV valve (2).


  54.  
  55. Remove the bolt (2) and the oil level indicator (1).


  56.  
  57. Remove the accessory drive belt (Refer to 07 - Cooling/Accessory Drive/BELT, Serpentine - Removal) .

  58.  
  59. Raise and support the vehicle (Refer to 04 - Vehicle Quick Reference/Hoisting - Standard Procedure) .

  60.  
  61. Disengage the wiring harness routing retainer (3) from the power steering pump bracket (1).

  62.  
  63. Remove the lower power steering pump retaining bolt (2).


  64.  
  65. Lower the vehicle.

  66.  
  67. Disengage the wiring harness routing retainer (2) from the power steering pump bracket.

  68.  
  69. Remove the upper power steering pump bracket retaining bolts (3) and reposition the pump (with bracket).



    NOTE:

    Mark the variable valve timing solenoid connectors (5 and 6) with a paint pen or equivalent so that they may be reinstalled in their original locations.


  70.  
  71. Disconnect the field circuit connector (3) from the generator.

  72.  
  73. Remove the B+ terminal from the generator stud (2).

  74.  
  75. Disconnect the right exhaust variable valve timing solenoid electrical connector (5).

  76.  
  77. Disconnect the right intake variable valve timing solenoid electrical connector (6).

  78.  
  79. Disengage the wire harness retainers (1 and 4) from the right cylinder head cover.


  80.  
  81. Disconnect the main harness from the engine injection/ignition harness (1).

  82.  
  83. Disconnect three fuel injector electrical connectors (5).

  84.  
  85. Disconnect three ignition coil electrical connectors (2).

  86.  
  87. Disconnect the electrical connector (4) from the right Camshaft Position (CMP) sensor.

  88.  
  89. Disengage three main wire harness retainers (3) from the right cylinder head cover.


  90.  
  91. Disconnect the electrical connector (2) from the ignition coil capacitor.

  92.  
  93. Remove the bolt (1) and the main wire harness retainer from the rear of the right cylinder head.



    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.


  94.  
  95. Disconnect the A/C compressor electrical connector (2).

  96.  
  97. Disconnect the left exhaust variable valve timing solenoid electrical connector (4).

  98.  
  99. Disconnect the left intake variable valve timing solenoid electrical connector (3).

  100.  
  101. Disengage three wire harness retainers (1) from the left cylinder head cover.


  102.  
  103. Disconnect the Engine Coolant Temperature (ECT) sensor connector (3).

  104.  
  105. Disconnect the left Camshaft Position (CMP) sensor (1).

  106.  
  107. Disengage the main wire harness retainer (2) from the cylinder head cover mounting stud.


  108.  
  109. Remove the four A/C compressor mounting bolts (1) and reposition the A/C compressor (2).


  110.  
  111. Remove the starter (Refer to 08 - Electrical/8F - Engine Systems/Starting/STARTER - Removal) .

  112.  
  113. Disconnect the power cord from the engine block heater (if equipped).

  114.  
  115. Remove the nut (2) and ground straps (1).


  116.  
  117. Remove the manual transmission, if equipped (Refer to 21 - Transmission and Transfer Case/Manual - Removal) .

  118.  
  119. If equipped with an automatic transmission, rotate the crankshaft in a clockwise direction until the torque converter bolts (1) are accessible through the starter mounting. Remove the six torque converter bolts (1).


  120.  
  121. If equipped with an automatic transmission, disengage the transmission cooler line retainer (1) from the oil pan flange.


  122.  
  123. If equipped with an automatic transmission;

    • Remove the bolt (2) and the torque converter dust shield (3).
    • Remove the side engine to transmission bolt (1).


  124.  
  125. If equipped with an automatic transmission;

    • Remove two rubber plugs (1) covering the rear oil seal retainer flange bolts.
    • Remove four transmission to the engine oil pan bolts (2 and 3).


  126.  
  127. If equipped with an automatic transmission, remove four upper transmission to engine bolts (1).


  128.  
  129. Lower the vehicle.

  130.  
  131. Remove the two bolts (2) and the engine mount heatshield (1) from the left engine mount.


  132.  
  133. Remove the two studbolts (3) and remove the left rear upper intake manifold support bracket (1).


  134.  
  135. Install the Driver Side Engine Lifting Bracket 10242-1 (1) on the LH cylinder head with bolts (2) provided with the Engine Lifting Bracket. Tighten the bolts to 21 N·m (15 ft. lbs.).


  136.  
  137. Install the Passenger Side Engine Lifting Bracket 10242-2 (1) on the RH cylinder head with bolts (2) from the Engine Lifting Bracket. Tighten the bolts to 21 N·m (15 ft. lbs.).


  138.  
  139. Reposition the main wire harness to the rear of the engine compartment.

  140.  
  141. Position a load-leveling lifting sling (2), such as OTC® 4305 Engine Load Leveler or equivalent, between the engine lifting brackets (3) and an engine hoist (1).



    NOTE:

    Right engine mount shown, left engine mount similar.


  142.  
  143. If equipped with an automatic transmission, support the transmission with a suitable jack.

  144.  
  145. Loosen both the left and right engine mount nuts (3).

    CAUTION:

    While slowly separating the engine from the vehicle, constant checks must be made to assure proper positioning and that no damage to other components or wiring harnesses occur during separation.


  146.  
  147. Carefully remove the engine from the engine bay area.

  148.  
  149. If required, remove the following components for installation on the replacement engine:

  150.