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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (H4DOTC) >> Cylinder Head >> Installation >> Cylinder Head LH

Cylinder Head LH

  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)

    Fig 1: Applying Liquid Gasket To Both Sides Of Cylinder Head Gasket LH
    G11267017Courtesy 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. Mount the cylinder head LH onto the cylinder block LH, and 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 2: Cylinder Head Bolts 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 reapply to them.
      Fig 3: Cylinder Head Bolts 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 4: Cylinder Head Bolts Loosening Sequence
      G11267007Courtesy of SUBARU OF AMERICA, INC.
    5. 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 5: Cylinder Head Bolts 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 6: Cylinder Head Bolts 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 7: Tightening Cylinder Head Bolts Using Angle Gauge
      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 8: Tightening Cylinder Head Bolts Using Angle Gauge
      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 9: Tightening Cylinder Head Bolts Using Angle Gauge
    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. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Fuel Injector>INSTALLATION>FUEL INJECTOR LH .
    2. Install the air intake adapter LH. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Tumble Generator Valve Assembly>INSTALLATION .
  8. Install the A/C compressor. Ref. to MECHANICAL (H4DOTC)>Cam Carrier>INSTALLATION>CAM CARRIER LH .
  9. Install the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>High Pressure Fuel Delivery Pipe>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
  10. Install the cam carrier LH. Ref. to MECHANICAL (H4DOTC)>Cam Carrier>INSTALLATION>CAM CARRIER LH .
  11. Install the rocker cover LH. Ref. to MECHANICAL (H4DOTC)>Rocker Cover>INSTALLATION>ROCKER COVER LH .
  12. Install the chain cover. Ref. to MECHANICAL (H4DOTC)>Chain Cover>INSTALLATION .
  13. Install the engine wiring harness. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Engine Wiring Harness>INSTALLATION .
  14. Install the intake manifold. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Intake Manifold>INSTALLATION .
  15. Install the engine to the vehicle. Ref. to MECHANICAL (H4DOTC)>Engine Assembly>INSTALLATION .
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