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Section 8 (Engine Mechanical System (2.5L)): Camshaft: Installation

WARNING: This page is about a different variant/trim than selected.
  1. Install the camshaft.

    Apply engine oil to the cylinder head at camshaft journal installation location before installing the camshaft. Install the camshaft so that each valve is close to or in contact with base circle of the cam lobe.

    NOTE:
    • Set the camshaft to the position shown in the figure.
    • When set at the position shown in the figure, it is not necessary to rotate the camshaft RH when installing the timing belt, but it is necessary to rotate the camshaft LH slightly.

    Intake camshaft LH: 

    Rotate 80° clockwise.

    Exhaust camshaft LH: 

    Rotate 45° counter clockwise.

    G13640637Courtesy of SUBARU OF AMERICA, INC.
  2. Install the camshaft cap.
    1. Apply small amount of liquid gasket to the mating surface of cap.
      NOTE:
      • Install within 5 min. after applying liquid gasket.
      • Do not apply liquid gasket excessively. Applying excessively may cause excess gasket to come out and flow toward oil seal, resulting in oil leak.

      Liquid gasket: 

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

      Liquid gasket applying diameter: 

      Mating surfaces other than ranges A and B 

      2±0.5 mm (0.0787±0.0197 in)

      Mating surfaces of ranges A and B 

      3±1 mm (0.1181±0.0394 in)

      G13640638Courtesy of SUBARU OF AMERICA, INC.
    2. Apply a thin coat of engine oil to the cap journal surface, and install the camshaft cap to the camshaft.
    3. Gradually tighten the camshaft cap in at least two steps, in alphabetical order shown in the figure, and then tighten to the specified torque.

      Tightening torque: 

      T1: 9.75 N.m (1.0 kgf-m, 7.2 ft-lb)

      T2: 20 N.m (2.0 kgf-m, 14.8 ft-lb)

      Fig 1: Camshaft Caps Bolts (With Torque Specification)
      G08539319Courtesy of SUBARU OF AMERICA, INC.
    4. After tightening the camshaft cap, ensure the camshaft rotates only slightly while holding it at base circle.
  3. Apply a thin coat of engine oil to the periphery of the camshaft oil seal and oil seal lip, and install the oil seal on the camshaft using ST1 and ST2.
    NOTE: Use a new oil seal.
    ST1 499587600 OIL SEAL INSTALLER
    ST2 499597200 OIL SEAL GUIDE
    G08539320Courtesy of SUBARU OF AMERICA, INC.
  4. Install the oil pipe to the front camshaft cap using the union bolt without filter (without protrusion). (If cylinder head is not removed)
    NOTE: Use a new gasket.

    Tightening torque: 

    31.5 N.m (3.2 kgf-m, 23.2 ft-lb)

    G13640641Courtesy of SUBARU OF AMERICA, INC.
  5. Install the oil pipe. (If cylinder head is removed) Refer to LUBRICATION(STI)>OIL PIPE>INSTALLATION .
  6. Install the tensioner bracket.

    Tightening torque: 

    24.5 N.m (2.5 kgf-m, 18.1 ft-lb)

    G07909879Courtesy of SUBARU OF AMERICA, INC.
  7. Install the timing belt cover No. 2 RH (A) and timing belt cover No. 2 LH (B).

    Tightening torque: 

    5 N.m (0.5 kgf-m, 3.7 ft-lb)

    G07911991Courtesy of SUBARU OF AMERICA, INC.
  8. Install the cam sprocket. Refer to MECHANICAL(STI)>CAM SPROCKET>INSTALLATION .
  9. Install the timing belt. Refer to MECHANICAL(STI)>TIMING BELT>INSTALLATION .
  10. Adjust the valve clearance. Refer to MECHANICAL(STI)>VALVE CLEARANCE>ADJUSTMENT .
  11. Install the rocker cover.
    1. Install the rocker cover gasket to the rocker cover. (Outer section 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), THREE BOND 1217H or equivalent

      G08539324Courtesy of SUBARU OF AMERICA, INC.
    3. Install the rocker cover onto cylinder heads. 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)

    G08539325Courtesy of SUBARU OF AMERICA, INC.
  12. Install the leak diagnosis connector (C) to the PCV hose (B).
  13. Connect the vacuum hose (A).
    NOTE: Make sure that the leak diagnosis connector is connected securely.
    G12437715Courtesy of SUBARU OF AMERICA, INC.
  14. Connect the vacuum hose.
    NOTE: Make sure that the leak diagnosis connector is connected securely.
    G12437716Courtesy of SUBARU OF AMERICA, INC.
  15. Connect the connector to the intake oil flow control solenoid valve.
    G08539306Courtesy of SUBARU OF AMERICA, INC.
  16. Connect the connector (A) to the exhaust camshaft position sensor and the connector (B) to the exhaust oil flow control solenoid valve LH.
    G08539307Courtesy of SUBARU OF AMERICA, INC.
  17. Install the ignition coil. Refer to IGNITION(STI)>IGNITION COIL>INSTALLATION .
  18. Install the air duct B (B) to the rocker cover LH and the air duct A (A).

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

    G08539168Courtesy of SUBARU OF AMERICA, INC.
  19. Fix the engine harness to the rocker cover RH with clips (A).
    G08539331Courtesy of SUBARU OF AMERICA, INC.
  20. Install the timing belt cover. Refer to MECHANICAL(STI)>TIMING BELT COVER>INSTALLATION .
  21. Install the crank pulley. Refer to MECHANICAL(STI)>CRANK PULLEY>INSTALLATION .
  22. Install the rear side belt. Refer to MECHANICAL(STI)>V-BELT>INSTALLATION>REAR SIDE BELT .
  23. Install the engine to the vehicle. Refer to MECHANICAL(STI)>ENGINE ASSEMBLY>INSTALLATION .
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