2007 Jeep Compass

Cylinder Head

Print

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the engine cover by pulling upward.
  4.  
  5. Properly relieve the fuel system pressure.
  6.  
  7. Disconnect and isolate the negative battery cable.
  8.  
  9. Drain the cooling system.
  10.  
  11. Remove the clean air hose and air cleaner housing.
  12.  
  13. Remove the coolant recovery bottle.
  14.  
  15. Remove and reposition the power steering reservoir.
  16.  
  17. Remove the windshield washer bottle.
  18.  
  19. Remove the accessory drive belt. Refer to Accessory Drive Belts, removal & installation.
  20.  
  21. Remove the power steering hose hold down.
  22.  
  23. Remove the 3 power steering pump mounting bolts through the openings in the pulley and reposition the pump.
  24.  
  25. Remove the cylinder head cover.
  26.  
  27. Remove the ignition coils from the cylinder head cover.
  28.  
  29. Raise and safely support the vehicle.
  30.  
  31. Remove the right splash shield.
  32.  
  33. Set the engine to Top Dead Center (TDC).
  34.  
  35. Remove the lower A/C compressor bolts, if equipped.
  36.  
  37. Remove the lower A/C compressor mount, if equipped.
  38.  
  39. Remove the accessory drive belt lower idler pulley.
  40.  
  41. Remove the crankshaft damper.
  42.  
  43. Remove the 3 bolts and the water pump pulley from the water pump.
  44.  
  45. Remove the lower bolt from the right side engine mount bracket.
  46.  
  47. Remove the timing chain cover lower bolts.
  48.  
  49. Remove the under floor catalytic converter.
  50.  
  51. Lower the vehicle.
  52.  
  53. Support the engine with a suitable jack.
  54.  
  55. Remove the right engine mount through bolt.
  56.  
  57. Remove the right engine mount-to-mount bracket bolts.
  58.  
  59. Remove the right engine mount adapter.
  60.  
  61. Remove the accessory drive upper idler pulley.
  62.  
  63. Remove the right upper engine mount bracket.
  64.  
  65. Remove the accessory drive belt tensioner.
  66.  
  67. Remove the upper timing chain cover. Refer to Timing Chain Cover and Seal, removal & installation.
  68.  
  69. Remove the timing chain. Refer to Timing Chain and Sprockets, removal & installation.
  70.  
  71. Remove the timing chain guide and the timing chain pivot guide.
  72.  
  73. Disconnect the fuel line from the fuel rail.
  74.  
  75. Unlock and disconnect the electrical connectors from the fuel injectors.
  76.  
  77. Remove the 2 fuel rail retaining bolts and remove the fuel rail.
  78.  
  79. Disconnect the electrical connectors from the coolant temperature sensor, oil temperature sensor, variable valve timing solenoids, camshaft position sensors, MAP sensor, manifold tuning valve, ignition interference suppressor, and electronic throttle control.
  80.  
  81. Remove the wiring harness retainer from the intake manifold and reposition the harness.
  82.  
  83. Remove the throttle body support bracket.
  84.  
  85. Disconnect the vacuum lines at the intake.
  86.  
  87. Remove the upper radiator hose retaining bolt.
  88.  
  89. Remove the intake manifold retaining bolts and remove the intake manifold.
  90.  
  91. Remove the 4 bolts and reposition the coolant adapter.
  92.  
  93. Remove the ground strap at the right rear of the cylinder head, if equipped.
    NOTE
    The camshaft bearing caps should have been marked during engine manufacturing. For example, number 1 exhaust camshaft bearing is marked E1 .


    WARNING
    DO NOT use a number stamp or a punch to mark the camshaft bearing caps. Damage to the bearing caps could occur.

  94.  
  95. Using a permanent ink or paint marker, identify the location and position on each camshaft bearing cap.
  96.  
  97. Remove the front camshaft bearing cap.
  98.  
  99. Slowly remove the remaining intake and exhaust camshaft bearing cap bolts, one turn at a time.
  100.  
  101. Remove the camshafts.
    NOTE
    All of the cylinder head bolts have captured washers EXCEPT the front two.

  102.  
  103. Remove the cylinder head bolts and the 2 un-captured washers.
  104.  
  105. Remove the cylinder head from the engine block.
  106.  
  107. Inspect the cylinder head and block sealing surfaces.
  108.  

To install:


WARNING
The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced.

  1. Check cylinder head bolts for necking by holding a scale or straight edge against the threads. If all the threads do not contact the scale, the bolt must be replaced.
    NOTE
    Ensure that the cylinder head bolt holes in the block are clean, dry (free of residual oil or coolant), and that the threads are not damaged.


    WARNING
    Always replace the variable valve timing filter screen (3) when servicing the head gasket or engine damage could result.

  2.  
  3. Replace the variable valve timing filter screen (3).
    NOTE
    When using RTV, the sealing surfaces must be clean and free from grease and oil. The parts should be assembled in 10 minutes and tighten to the final torque within 45 minutes.



    Click image to see an enlarged view

    Fig. Always replace the variable valve timing filter screen when servicing the head gasket or engine damage could result

  4.  
  5. Place 2 pea size dots of MOPAR® engine sealant RTV, or equivalent (1), on the cylinder block, as shown.

    Click image to see an enlarged view

    Fig. Place 2 pea size dots of engine sealant RTV on the cylinder block, as shown

  6.  
  7. Position the new cylinder head gasket on engine block with the part number facing up. Ensure gasket is seated over the locating dowels in block.
  8.  
  9. Place 2 pea size dots of MOPAR® engine sealant RTV, or equivalent (1), on the cylinder head gasket, as shown.
    NOTE
    The head must be installed within 15 minutes before the RTV skins.



    Click image to see an enlarged view

    Fig. Place 2 pea size dots of engine sealant RTV on the cylinder head gasket, as shown

  10.  
  11. Position the cylinder head onto the engine block.
    WARNING
    This engine was built with 2 different styles of cylinder head bolts. Each style bolt requires a different torque value. The bolts can be identified by the short bolt head (1) and the long bolt head (2).

  12.  
  13. Measure the bolt head from the washer to the top of the bolt head. The short bolt head (1) measures 5 / 16 inch (8mm) and the long bolt head (2) measures 1 / 2 inch (13mm).
  14.  
  15. Identify whether your engine has the short head design (1) or the long head design (2).
    NOTE
    The front 2 cylinder head bolts do not have captured washers. The washers must be installed with the bevel edge (1) up towards the bolt head.



    Click image to see an enlarged view

    Fig. This engine was built with 2 different styles of cylinder head bolts. Each style bolt requires a different torque value. The bolts can be identified by the short bolt head (1) and the long bolt head (2)



    Click image to see an enlarged view

    Fig. The front 2 cylinder head bolts do not have captured washers. The washers must be installed with the bevel edge (1) up towards the bolt head

  16.  
  17. Install washers (1) for the front 2 cylinder head bolts with the beveled edge facing up.
    NOTE
    Before installing the cylinder head bolts, lubricate the threads with clean engine oil.

  18.  
  19. Install the cylinder head bolts and tighten in the sequence shown.
  20.  
  21. If the cylinder head bolts have the short head (1), use the following torque specifications:
    1. Step 1: Tighten all bolts to 25 ft. lbs. (30 Nm).
    2.  
    3. Step 2: Tighten all bolts to 45 ft. lbs. (61 Nm).
    4.  
    5. Step 3: Tighten all bolts again to 45 ft. lbs. (61 Nm).
    6.  
    7. Step 4: Tighten all bolts an additional 90°.
      NOTE
      Do not use a torque wrench for Step 4.

    8.  

  22.  
  23. If the cylinder head bolts have the long head (2), use the following torque specifications:
    1. Step 1: Tighten all bolts to 25 ft. lbs. (30 Nm).
    2.  
    3. Step 2: Tighten all bolts to 54 ft. lbs. (73 Nm).
    4.  
    5. Step 3: Tighten all bolts to 54 ft. lbs. (73 Nm).
    6.  
    7. Step 4: Tighten all bolts an additional 90°.
      NOTE
      Do not use a torque wrench for Step 4.



      Click image to see an enlarged view

      Fig. Cylinder head bolt tightening sequence-2.0L and 2.4L engines

    8.  

  24.  
  25. Clean excess RTV from the timing chain cover sealing surface.
  26.  
  27. Install the coolant adapter with new seals. Tighten the bolts to 13 ft. lbs. (18 Nm).
  28.  
  29. The front camshaft bearing cap is numbered either 1, 2, or 3. This corresponds to the select fit front exhaust camshaft bearing to use.
  30.  
  31. Install the corresponding select fit front exhaust camshaft bearing.
  32.  
  33. Oil all of the camshaft journals with clean engine oil.
  34.  
  35. Position the exhaust camshaft (1) and intake camshaft (2) on the bearing journals in the cylinder head.
  36.  
  37. Align the camshaft timing marks (3) so that they are facing each other and are in line with the cylinder head cover sealing surface.
    WARNING
    Install the front intake and exhaust camshaft bearing cap last. Ensure that the dowels are seated and follow the torque sequence or damage to the engine could result.


    NOTE
    If the front camshaft bearing cap is broken, the cylinder head MUST be replaced.



    Click image to see an enlarged view

    Fig. Align the camshaft timing marks so that they are facing each other and are in line with the cylinder head cover sealing surface

  38.  
  39. Install the intake and exhaust camshaft bearing caps and slowly tighten the bolts to 85 inch lbs. (10 Nm) in the sequence shown.
    NOTE
    Verify that the exhaust bearing shells are correctly installed, and the dowels are seated in the head, prior to tightening the bolts.



    Click image to see an enlarged view

    Fig. Camshaft bearing cap tightening sequence

  40.  
  41. Install the front intake and exhaust bearing cap and tighten the bolts to 18 ft. lbs. (25 Nm) in the sequence shown.

    Click image to see an enlarged view

    Fig. Tightening sequence for front intake and exhaust bearing caps-torque these last

  42.  
  43. Install the timing chain guide (4) and tighten the bolts to 105 inch lbs. (12 Nm).
  44.  
  45. Install the moveable timing chain pivot guide (6) and tighten the bolt to 105 inch lbs. (12 Nm).
  46.  
  47. Install the timing chain (2) and tensioner (5).

    Click image to see an enlarged view

    Fig. Timing chain and related components

  48.  
  49. Install the timing chain cover, engine mount, pulleys, and accessory drive belt.
  50.  
  51. Install the cylinder head cover and ignition coils.
  52.  
  53. Install the exhaust manifold. Refer to Exhaust Manifold, removal & installation.
  54.  
  55. Install the ground strap at the right rear of the cylinder head, if equipped.
  56.  
  57. Install the intake manifold, vacuum lines, and fuel rail. Refer to Intake Manifold, removal & installation.
  58.  
  59. Install the upper radiator hose retaining bracket bolt.
  60.  
  61. Connect the coil and the injector electrical connectors.
  62.  
  63. Connect the electrical connectors to the coolant temperature sensor, camshaft position sensors, oil temperature sensor, variable valve timing solenoids, MAP sensor, manifold tuning valve, ignition interference suppressor, and electronic throttle control.
  64.  
  65. Install the power steering pump reservoir. Tighten the mounting screw to 106 inch lbs. (12 Nm).
  66.  
  67. Install the windshield washer reservoir.
  68.  
  69. Install the coolant recovery reservoir. Tighten the mounting bolts to 35 inch lbs. (4 Nm).
  70.  
  71. Install the clean air hose and air cleaner housing.
  72.  
  73. Fill the cooling system with the proper fluid to the correct level.
  74.  
  75. Install a new oil filter and fill the engine with the proper type and amount of oil.
  76.  
  77. Connect the negative battery cable.
  78.  
  79. Operate the engine until it reaches the normal operating temperature. Check the oil and cooling systems for leaks and for correct fluid levels.
  80.  
  81. Install the engine cover.
  82.  

 
label.common.footer.alt.autozoneLogo