Subaru Tribeca 2006

Cylinder Head

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the crankshaft pulley cover.
  6.  
  7. Remove the crankshaft pulley bolt.
  8.  
  9. Lock the crankshaft in place using tool ST499977100, or equivalent.
  10.  
  11. Remove the crankshaft pulley.
  12.  
  13. Remove the front timing chain cover.
    NOTE
    Bolts are three different sizes. Be careful to install the correct bolt in the correct hole.

  14.  
  15. Remove the timing chain.
  16.  
  17. Remove the camshaft sprocket.
    NOTE
    Be sure to lock the camshaft in place using tool ST499977500, or equivalent.

  18.  
  19. Remove the crankshaft sprocket.
  20.  
  21. Remove the oil pump.
  22.  
  23. Remove the water pump.
  24.  
  25. Remove the rear timing chain cover retaining bolts. Remove the rear timing chain cover.
    NOTE
    There are seven different size bolts. Be sure not to confuse them on installation.

  26.  
  27. Remove the camshafts.
  28.  
  29. Remove the cylinder head bolts in the proper sequence. Leave bolts 2 and 4 connected by a few threads to prevent the head from falling. Tap the head with a plastic mallet to separate it from the block.
  30.  
  31. Remove bolts 2 and 4 from the cylinder head. Remove the cylinder head from the engine. Discard the gasket.
  32.  
  33. Clean all gasket material from both mating surfaces.

    Click image to see an enlarged view

    Fig. Cylinder head bolt loosening sequence



    Click image to see an enlarged view

    Fig. Cylinder head bolt tightening sequence

  34.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Apply a thin coat of clean engine oil to the washers and cylinder head bolts.
  4.  
  5. Tighten the cylinder head retaining bolts to specification and in the proper sequence.
  6.  
  7. Install the rear chain cover as follows:
    NOTE
    There are several size bolts used, refer to the illustration for size and locations.

    1. Rear chain cover gasket and clean the mating surfaces.
    2.  
    3. Apply liquid gasket maker to the mating surfaces of the cover. Refer to the illustration for gasket maker application and diameter.
    4.  
    5. Install new O-rings. Refer to the illustration for O-ring location and size
    6.  
    7. Install the rear chain cover and temporarily tighten the bolts, refer to the illustration for size and locations.
    8.  
    9. Tighten the cover bolts in the sequence illustrated to the specifications shown in the illustration.
    10.  

  8.  
  9. Start the engine and allow it to reach operating temperature.
  10.  
  11. Check for leaks, correct as required.

    Click image to see an enlarged view

    Fig. Rear timing chain cover sealant application



    Click image to see an enlarged view

    Fig. Rear timing chain bolt sizes and locations



    Click image to see an enlarged view

    Fig. Rear cover O-ring sizes and locations



    Click image to see an enlarged view

    Fig. Rear cover bolt tightening sequence and torque specifications

  12.  

 
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