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Cylinder Head: Installation

WARNING: This page is about a different variant/trim than selected.
  1. Install the cylinder head and gasket on cylinder block.
    CAUTION: Be careful not to scratch the mating surface of cylinder head and cylinder block.
    NOTE: Use a new cylinder head gasket.
  2. Tighten the cylinder head bolts.
    1. Apply a thin coat of engine oil to washer and bolt thread.
    2. Tighten all bolts to 29 N.m (3.0 kgf-m, 21.4 ft-lb) in alphabetical order.
    3. Tighten all bolts further to 69 N.m (7.0 kgf-m, 50.9 ft-lb) in alphabetical order.
    4. Loosen all the bolts by 180° in the reverse order of installing, and loosen them further by 180°.
    5. Tighten all bolts to 49 N.m (5.0 kgf-m, 36.1 ft-lb) in alphabetical order.
    6. Tighten all bolts by 80 to 90° in alphabetical order.
    7. Tighten all bolts further by 40 to 45° in alphabetical order.
      CAUTION: The tightening angle of the bolt should not exceed 45°.
    8. Tighten bolts (A) and (B) further by 40 - 45°.
      CAUTION: Make sure the total "re-tightening angle" of the step ( 7) and ( 8) does not exceed 90°.
      Fig 1: Identifying Cylinder Head Bolts In Sequence
      G06649427Courtesy of SUBARU OF AMERICA, INC.
  3. Install the oil level gauge guide. (LH side only)

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

  4. Install the camshaft. Ref. to INSTALLATION , Camshaft.
  5. Install the clip stay.

    Tightening torque: 

    36 N.m (3.7 kgf-m, 26.6 ft-lb) 

    Fig 2: Identifying Clip Stay
    G06649424Courtesy of SUBARU OF AMERICA, INC.
  6. Install the oil pipe. Ref. to INSTALLATION , Oil Pipe.
  7. Install the A/C compressor bracket on cylinder head. (LH side only)

    Tightening torque: 

    36 N.m (3.7 kgf-m, 26.6 ft-lb) 

  8. Install the cam sprocket. Ref. to INSTALLATION , Cam Sprocket.
  9. Install the timing belt. Ref. to INSTALLATION , Timing Belt.
  10. Adjust the valve clearance. Ref. to ADJUSTMENT , Valve Clearance.
  11. Install the rocker cover.
    1. Install the rocker cover gasket to the rocker cover. (Outer periphery and ignition coil section)
      NOTE: Use a new rocker cover gasket.
    2. Apply liquid gasket to the specified point of the cylinder head.
      NOTE: Install within 5 min. after applying liquid gasket.

      Liquid gasket: 

      THREE BOND 1217G (Part No. K0877Y0100) or equivalent 

      Fig 3: Applying Liquid Gasket To Specified Point Of Cylinder Head
      G06649411Courtesy of SUBARU OF AMERICA, INC.
    3. Install the rocker cover to cylinder head. Ensure the gasket is properly positioned during installation.
    4. Temporarily tighten the rocker cover bolts in alphabetical order shown in the figure, and then tighten to specified torque in alphabetical order.

      Tightening torque: 

      6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

      Fig 4: Identifying Rocker Cover Bolts In Sequence
      G06649412Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the PCV hose to the rocker cover.
  13. Install the timing belt cover. Ref. to INSTALLATION , Timing Belt Cover.
  14. Install the crank pulley. Ref. to INSTALLATION , Crank Pulley.
  15. Install the intake manifold. Ref. to INSTALLATION , Intake Manifold.
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