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Cylinder Head LH

WARNING: This page is about a different variant/trim than selected.
  1. Clean the bolt holes in the cylinder block LH.
    CAUTION: To avoid erroneous tightening of the bolts, clean out the bolt holes sufficiently by blowing with compressed air to eliminate engine coolant etc.
  2. Apply liquid gasket to both sides of the cylinder head gasket LH as shown in the figure.
    NOTE:
    • Use a new cylinder head gasket LH.
    • Before applying liquid gasket, degrease the mating surface of cylinder blocks LH and cylinder head LH.
    • Install within 5 min. after applying liquid gasket.

    Liquid gasket: 

    THREE BOND 1217G (Part No. 0877Y0100) or equivalent 

    Liquid gasket applying diameter: 

    3±1 mm (0.1181±0.0394 in) 

    Fig 1: Identifying Liquid Gasket Applying Area On Both Sides Of Cylinder Head Gasket LH
    G08563121Courtesy of SUBARU OF AMERICA, INC.
  3. Attach the cylinder head gasket LH.
    NOTE: Check that liquid gasket is squeezed out from the cylinder head gasket LH.
  4. Install the cylinder head LH to the cylinder block LH.
    CAUTION: Be careful not to scratch the mating surface of cylinder head LH and cylinder block LH.
    1. Clean the cylinder head bolt threads and apply sufficient engine oil to the washer and cylinder head bolts threads.
    2. Mount the cylinder head LH onto the cylinder block LH, then tighten all bolts with a torque of 29 N.m (3.0 kgf-m, 21.4 ft-lb) in numerical order as shown in the figure.
      Fig 2: Identifying Cylinder Head LH Bolts Tightening Sequence
      G08317097Courtesy of SUBARU OF AMERICA, INC.
    3. Tighten all cylinder head bolts further with a torque of 100 N.m (10.2 kgf-m, 73.8 ft-lb) in numerical order as shown in the figure.
      CAUTION: If the bolt makes stick-slip sound during tightening, repeat the procedure from step  1). In that case, the cylinder head gasket LH can be reused. But it is necessary to remove liquid gasket completely from cylinder block LH, cylinder head LH and cylinder head gasket LH and re-apply to them.
      Fig 3: Identifying Cylinder Head Bolts Tightening Sequence
      G08317098Courtesy of SUBARU OF AMERICA, INC.
    4. Loosen all cylinder head bolts 180° in numerical order as shown in the figure, and then loosen all cylinder head bolts 180° further in numerical order as shown in the figure.
      Fig 4: Identifying Loosening Sequence Of Cylinder Head Mounting Bolts
      G08317086Courtesy of SUBARU OF AMERICA, INC.
    5. Tighten all cylinder head bolts with a torque of 42 N.m (4.3 kgf-m, 31.0 ft-lb) in numerical order as shown in the figure.
      Fig 5: Identifying Tightening Sequence Of Cylinder Head Mounting Bolts
      G08317098Courtesy of SUBARU OF AMERICA, INC.
    6. Using ST2, tighten all cylinder head bolts with specified angle in numerical order as shown in the figure.
      NOTE: Attach the magnet used for securing the ST2 (ANGLE GAUGE) to ST1.

      ST1 499817100 ENGINE STAND

      ST2 18854AA000 ANGLE GAUGE

      Tightening angle: 

      80°±2° 

      Fig 6: Tightening Cylinder Head Bolts Using Angle Gauge
      G08317101Courtesy of SUBARU OF AMERICA, INC.
    7. Using ST2, tighten the cylinder head bolts (2 places) with specified angle in numerical order as shown in the figure.
      NOTE: Attach the magnet used for securing the ST2 (ANGLE GAUGE) to ST1.

      ST1 499817100 ENGINE STAND

      ST2 18854AA000 ANGLE GAUGE

      Tightening angle: 

      75°±2° 

      Fig 7: Tightening Cylinder Head Bolts Using Angle Gauge
      G08317102Courtesy of SUBARU OF AMERICA, INC.
    8. Using ST2, tighten the cylinder head bolts (4 places) with specified angle in numerical order as shown in the figure.
    NOTE:
    • After tightening, if the liquid gasket is squeezed out onto the seal surface of the chain cover, completely remove any squeezed-out liquid gasket.
    • Attach the magnet used for securing the ST2 (ANGLE GAUGE) to ST1.

    ST1 499817100 ENGINE STAND

    ST2 18854AA000 ANGLE GAUGE

    Tightening angle: 

    30°±2° 

    Fig 8: Tightening Cylinder Head Bolts Using Angle Gauge
    G08317103Courtesy of SUBARU OF AMERICA, INC.
  5. Set the A/C compressor bracket to the cylinder head LH, and tighten the bolts in numerical order as shown in the figure.

    Tightening torque: 

    36 N.m (3.7 kgf-m, 26.6 ft-lb) 

    Fig 9: Identifying Tightening Sequence Of A/C Compressor Bracket To Cylinder Head LH Mounting Bolts
    G08563129Courtesy of SUBARU OF AMERICA, INC.
  6. Install the cam carrier LH. < Refer to CAM CARRIER LH , INSTALLATION, Cam Carrier. >
  7. Install the rocker cover LH. < Refer to ROCKER COVER LH , INSTALLATION, Rocker Cover. >
  8. Install the chain cover. < Refer to INSTALLATION , Chain Cover. >
  9. Install the tumble generator valve assembly LH. < Refer to INSTALLATION , Tumble Generator Valve Assembly. >
  10. Install the intake manifold. < Refer to INSTALLATION , Intake Manifold. >
  11. Install the engine to the vehicle. < Refer to INSTALLATION , Engine Assembly. >
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