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Cylinder Head LH

WARNING: This page is about a different variant/trim than selected.
  1. Set the part so that the cylinder block LH is on the upper side.
  2. 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.
  3. 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. K0877Y0100), THREE BOND 1217H or equivalent

    Liquid gasket applying diameter: 

    3±1 mm (0.1181±0.0394 in)

    G13259232Courtesy of SUBARU OF AMERICA, INC.
  4. Attach the cylinder head gasket LH.
    NOTE: Check that liquid gasket is squeezed out from the cylinder head gasket LH.
  5. 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. Set the cylinder head LH to the cylinder block LH, then tighten all bolts with a torque of 20 N.m (2.0 kgf-m, 14.8 ft-lb) in numerical order as shown in the figure.
      Fig 1: Cylinder Head Bolts LH With (Tightening Sequence)
      G11267018Courtesy 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 2: Cylinder Head Bolts LH With (Tightening Sequence)
      G11267019Courtesy of SUBARU OF AMERICA, INC.
    4. Loosen all cylinder head bolts by 360° in the numerical order as shown in the figure.
      Fig 3: Cylinder Head Bolts LH With (Loosening Sequence)
      G11267007Courtesy of SUBARU OF AMERICA, INC.
    5. Tighten all bolts with torque of 20 N.m (2.0 kgf-m, 14.8 ft-lb) in numerical sequence as shown in the figure.
      Fig 4: Cylinder Head Bolts LH With (Tightening Sequence)
      G11267019Courtesy of SUBARU OF AMERICA, INC.
    6. 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: Cylinder Head Bolts LH With (Tightening Sequence)
      G11267019Courtesy of SUBARU OF AMERICA, INC.
    7. Using angle gauge, tighten all cylinder head bolts with specified angle in numerical order as shown in the figure.

      Tightening angle: 

      100°±2°

      Fig 6: Cylinder Head Bolts LH With (Tightening Sequence)
      G11267023Courtesy of SUBARU OF AMERICA, INC.
    8. Using angle gauge, tighten the cylinder head bolts (2 places) with specified angle in numerical order as shown in the figure.

      Tightening angle: 

      100°±2°

      Fig 7: Cylinder Head Bolts (2 Places) LH With (Tightening Sequence)
      G11267024Courtesy of SUBARU OF AMERICA, INC.
    9. Using angle gauge, 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.

      Tightening angle: 

      50°±2°

    Fig 8: Cylinder Head Bolts (4 Places) LH With (Tightening Sequence)
    G11267025Courtesy of SUBARU OF AMERICA, INC.
  6. Set the part so that the installation surface of the intake manifold is on the upper side.
  7. When the cylinder head LH has been disassembled
    NOTE: When the cylinder head LH has been disassembled, perform the following steps also.
    1. Install the fuel injector LH. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>FUEL INJECTOR>INSTALLATION>FUEL INJECTOR LH .
    2. Install the air intake adapter LH. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>TUMBLE GENERATOR VALVE ASSEMBLY>INSTALLATION .
  8. Install the A/C compressor. Refer to MECHANICAL (EXCEPT FOR STI)>CAM CARRIER>INSTALLATION>CAM CARRIER LH .
  9. Install the high-pressure fuel delivery pipe assembly. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>HIGH PRESSURE FUEL DELIVERY PIPE>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSY .
  10. Install the cam carrier LH. Refer to MECHANICAL (EXCEPT FOR STI)>CAM CARRIER>INSTALLATION>CAM CARRIER LH .
  11. Install the engine wiring harness. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>ENGINE WIRING HARNESS>INSTALLATION .
  12. Install the engine to the vehicle. Refer to MECHANICAL (EXCEPT FOR STI)>ENGINE ASSEMBLY>INSTALLATION .
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