Mitsubishi Raider 2006

Cylinder Head

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Removal & Installation



3.7L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Properly relieve the fuel system pressure.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Air intake assembly
     
    Exhaust pipe at the exhaust manifold
     
    Intake manifold
     
    Master cylinder and booster assembly
     
    Fuel injector harnesses
     
    Left side breather tube
     
    Cylinder head cover
     
    Engine cooling fan and shroud
     
    Accessory drive belt
     
    Power steering pump without disconnect the lines and hang securely, left side
     

  8.  
  9. Rotate the crankshaft so that the crankshaft timing mark aligns with the Top Dead Center (TDC) mark on the front cover, and the V6 marks on the camshaft sprockets are at 12 o-clock as shown.

    Crankshaft damper
     
    Front cover

    Click image to see an enlarged view

    Fig. Camshaft sprocket timing marks-3.7L

     

  10.  
  11. Lock the secondary timing chain to the idler sprocket with Timing Chain Locking tool 8429.

    Click image to see an enlarged view

    Fig. Camshaft locking tool-3.7L

  12.  
  13. Matchmark the secondary timing chain one link on each side of the V6 mark to the camshaft sprocket.
  14.  
  15. Remove or disconnect the following:
    NOTE
    The cylinder head is retained by twelve bolts. Four of the bolts are smaller and are at the front of the head.



    Secondary timing chain tensioner
     
    Cylinder head access plug
     
    Secondary timing chain guide
     
    Camshaft sprocket
     
    Cylinder head and gasket
     

  16.  

To install:

Click image to see an enlarged view

Fig. Examine the head bolts for signs of stretching-3.7L engine

  1. Clean the cylinder head surfaces of old gasket material.
    WARNING
    Use a plaster or wooden scraper only.

  2.  
  3. Check the cylinder head bolts for signs of stretching and replace as necessary.
  4.  
  5. Lubricate the threads of the 11mm bolts with clean engine oil.
  6.  
  7. Coat the threads of the 8mm bolts with Mopar® Lock and Seal Adhesive.
  8.  
  9. Install the cylinder heads. Use new gaskets and tighten the bolts, in sequence, as follows:
    1. Step 1: Bolts 1-8 to 20 ft. lbs. (27 Nm)
    2.  
    3. Step 2: Bolts 1-8 verify torque without loosening
    4.  
    5. Step 3: Bolts 9-12 to 10 ft. lbs. (14 Nm)
    6.  
    7. Step 4: Bolts 1-8 plus 1 / 4 (90 degree) turn
    8.  
    9. Step 5: Bolts 1-8 plus 1 / 4 (90 degree) turn again
    10.  
    11. Step 6: Bolts 9-12 to 19 ft. lbs. (26 Nm)

      Click image to see an enlarged view

      Fig. Cylinder head bolt torque sequence-3.7L

    12.  

  10.  
  11. Position the secondary chain onto the camshaft sprocket, making sure one marked chain link is on either side of the V6 mark on the gear.
  12.  
  13. Using Special Tool 8428 Camshaft Wrench, position the sprocket onto the camshaft. Tighten retaining bolt to 90 ft. lbs. (122 Nm).
  14.  
  15. Install or connect the following:

    Secondary timing chain guide
     
    Cylinder head access plug
     
    Secondary timing chain tensioner.
     

  16.  
  17. Remove the Timing Chain Locking tool.
  18.  
  19. Install or connect the following:

    Front cover
     
    Crankshaft damper. Torque the bolt to 130 ft. lbs. (175 Nm).
     
    Power steering pump, left side only
     
    Accessory drive belt
     
    Engine cooling fan and shroud
     
    Cylinder head cover. Tighten to 105 inch lbs. (12 Nm).
     
    Left side breather tube
     
    Fuel injector harnesses
     
    Intake manifold
     
    Exhaust pipe to the exhaust manifold
     
    Air intake assembly
     
    Negative battery cable
     

  20.  
  21. Fill and bleed the cooling system.
  22.  
  23. Start the engine, check for leaks and repair if necessary.
  24.  

4.7L Engine
Left Side
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Air intake assembly
     
    Exhaust pipe at the exhaust manifold
     
    Intake manifold
     
    Master cylinder and booster assembly
     
    Injector wiring harnesses
     
    Left side breather tube
     
    Cylinder head cover
     
    Fan shroud and fan assembly
     
    Accessory drive belt
     
    Power steering pump without disconnecting and hang securely
     

  6.  
  7. Rotate the crankshaft until the damper mark is aligned with the TDC mark. Verify that the V8 mark on the camshaft sprocket is at the 12 o-clock position.
  8.  
  9. Remove or disconnect the following:

    Crankshaft damper
     
    Front cover
     

  10.  
  11. Lock the secondary timing chains to the idler sprocket with Special Tool 8515, or equivalent.
  12.  
  13. Mark the secondary timing chain, on link on either side of the V8 mark on the cam sprocket.
  14.  
  15. Remove the left side secondary chain tensioner.
  16.  
  17. Remove the cylinder head access plug.
  18.  
  19. Remove the secondary chain guide.
  20.  
  21. Remove the camshaft sprocket.
  22.  
  23. Remove the head bolts and cylinder head.
    NOTE
    There are 4 smaller bolts at the front of the head. Don-t overlook these.


    WARNING
    Don-t lay the head on its sealing surface. Due to the design of the head gasket, any distortion to the head sealing surface will result in leaks.

  24.  

To install:

Click image to see an enlarged view

Fig. Cylinder head tightening sequence-4.7L


NOTE
Check the head bolts. If any necking is observed, replace the bolt.

  1. Lubricate the threads of the 11mm bolts with clean engine oil.
  2.  
  3. Coat the threads of the 8mm bolts with Mopar® Lock and Seal Adhesive.
  4.  
  5. Install the cylinder head with a new gasket. Tighten the bolts as follows:
    1. Step 1: Bolts 1-10 to 15 ft. lbs. (20 Nm)
    2.  
    3. Step 2: Bolts 1-10 to 35 ft. lbs. (47 Nm)
    4.  
    5. Step 3: Bolts 11-14 to 18 ft. lbs. (25 Nm)
    6.  
    7. Step 4: Bolts 1-10 plus 90 degrees
    8.  
    9. Step 5: Bolts 11-14 to 22 ft. lbs. (30 Nm)
    10.  

  6.  
  7. Position the secondary chain onto the camshaft sprocket, making sure one marked chain link is on either side of the V8 mark on the gear and position the gear onto the camshaft.
  8.  
  9. Install the camshaft sprocket and tighten to 90 ft. lbs. (122 Nm).
  10.  
  11. Install the left side secondary timing chain guide.
  12.  
  13. Install the cylinder head access plug.
  14.  
  15. Reset and install the left side secondary timing chain tensioner and remove Special Tool 8515.
  16.  
  17. The remainder of installation is the reverse order of removal. Note the following torques:
    1. Crankshaft damper to 130 ft. lbs. (175 Nm).
    2.  
    3. Cylinder head cover bolts to 105 inch lbs. (12 Nm).
    4.  

  18.  
  19. Fill the cooling system to the correct level.
  20.  
  21. Start the engine and check for leaks.
  22.  

Right Side
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Air intake assembly
     
    Exhaust pipe at the exhaust manifold
     
    Intake manifold
     
    Accessory drive belt
     
    A/C compressor, and hang securely aside
     
    Heater hoses
     
    Fuel injector and ignition coil connectors
     
    PCV hose
     
    Fuel injector wiring harnesses
     
    Ignition coil wiring harness
     
    Right side breather tube
     
    Cylinder head cover
     
    Fan shroud
     
    Oil filler housing from the cylinder head
     

  6.  
  7. Rotate the crankshaft until the damper mark is aligned with the TDC mark. Verify that the V8 mark on the camshaft sprocket is at the 12 o-clock position.
  8.  
  9. Remove or disconnect the following:

    Vibration damper
     
    Timing chain cover
     

  10.  
  11. Lock the secondary timing chains to the idler sprocket with Special Tool 8515, or equivalent.
  12.  
  13. Mark the secondary timing chain, on link on either side of the V8 mark on the cam sprocket.
  14.  
  15. Remove the right side secondary chain tensioner.
  16.  
  17. Remove the cylinder head access plug.
  18.  
  19. Remove the secondary chain guide.
  20.  
  21. Remove the camshaft sprocket.
    WARNING
    Do not pry on the target wheel for any reason!

  22.  
  23. Remove the head bolts and cylinder head.
    NOTE
    There are 4 smaller bolts at the front of the head. Don-t overlook these.


    WARNING
    Don-t lay the head on its sealing surface. Due to the design of the head gasket, any distortion to the head sealing surface will result in leaks.

  24.  

To install:


NOTE
Check the head bolts. If any necking is observed, replace the bolt.

  1. Lubricate the threads of the 11mm bolts with clean engine oil.
  2.  
  3. Coat the threads of the 8mm bolts with Mopar® Lock and Seal Adhesive.
  4.  
  5. Install the cylinder head with a new gasket. Tighten the bolts as follows:
    1. Step 1: Bolts 1-10 to 15 ft. lbs. (20 Nm)
    2.  
    3. Step 2: Bolts 1-10 to 35 ft. lbs. (47 Nm)
    4.  
    5. Step 3: Bolts 11-14 to 18 ft. lbs. (25 Nm)
    6.  
    7. Step 4: Bolts 1-10 plus 90 degrees
    8.  
    9. Step 5: Bolts 11-14 to 22 ft. lbs. (30 Nm)
    10.  

  6.  
  7. Position the secondary chain onto the camshaft sprocket, making sure one marked chain link is on either side of the V8 mark on the sprocket and position the sprocket onto the camshaft.
  8.  
  9. Tighten the camshaft sprocket bolt to 90 ft. lbs. (122 Nm).
  10.  
  11. Install the right side secondary chain guide.
  12.  
  13. Install the right side cylinder head access plug.
  14.  
  15. Reset and install the right side secondary chain tensioner and remove Special Tool 8515.
  16.  
  17. The remainder of the installation is the reverse order of removal. Note the following torques:
    1. Crankshaft damper to 130 ft. lbs. (175 Nm)
    2.  
    3. Cylinder head cover bolts to 105 inch lbs. (12 Nm)
    4.  
    5. Radiator upper shroud to 95 inch lbs. (11 Nm)
    6.  

  18.  
  19. Refill the cooling system to the correct level.
  20.  
  21. Start the engine and check for leaks.
  22.  

 
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