Engine Mechanical (H4DOTC): Camshaft: Installation

Camshaft installation: Apply engine oil to cylinder head at camshaft bearing location before installing the camshaft. Install the camshaft so that each valve is close to or in contact with "base circle" of cam lobe.
NOTE:
- When the camshafts are positioned as shown in the figure, camshafts need to be rotated at a minimum to align with the timing belt during installation.
- Camshaft (RH) need not be rotated when set at position shown in the figure. Intake camshaft (LH): Rotate 80° clockwise. Exhaust camshaft (LH): Rotate 45° counterclockwise.
Fig 1: Identifying Camshaft Installation Position (Intake/Exhaust)
Courtesy of SUBARU OF AMERICA, INC.
Camshaft cap and oil flow control solenoid valve assembly installation:
1. Apply liquid gasket sparingly to cap mating surface.
  NOTE: Do not apply liquid gasket excessively. Failure to do so may cause excess packing to come out and flow toward the oil seal, resulting in oil leaks.
  1. Liquid gasket: Part No. 004403007
  2. THREE BOND 1215 or equivalent
  Fig 2: Applying Liquid Gasket To Cap Mating Surface
  Courtesy of SUBARU OF AMERICA, INC.
2. Apply engine oil to cap bearing surface and install the cap on camshaft as shown by identification mark (A).
  
  Fig 3: Applying Engine Oil To Cap Bearing Surface
  Courtesy of SUBARU OF AMERICA, INC.
3. Gradually tighten the camshaft cap and oil control valve assembly in at least two stages in alphabetical sequence shown in the figure, and then tighten to specified torque.
  Tightening torque:
  1. T1: 10 N.m (1.0 kgf-m, 7.2 ft-lb)
  2. T2: 20 N.m (2.0 kgf-m, 14.5 ft-lb)
  Fig 4: Tightening Intake Camshaft Cap Bolts
  Courtesy of SUBARU OF AMERICA, INC.
4. Similarly, tighten cap on the exhaust side. After tightening cap, ensure the camshaft rotates only slightly while holding it at "base" circle.
  Tightening torque:
  1. T1: 10 N.m (1.0 kgf-m, 7.2 ft-lb)
  2. T2: 20 N.m (2.0 kgf-m, 14.5 ft-lb)
  Fig 5: Tightening Exhaust Camshaft Cap Bolts
  Courtesy of SUBARU OF AMERICA, INC.
5. Camshaft oil seal installation: Apply grease to new oil seal lips and press onto front end of camshaft by using ST1 and ST2.
  NOTE: Use a new oil seal.
  1. ST1 499587600 OIL SEAL GUIDE
  2. ST2 499597200 OIL SEAL GUIDE
  Fig 6: Installing Camshaft Oil Seal
  Courtesy of SUBARU OF AMERICA, INC.
Rocker cover installation:
1. Install the gasket on rocker cover. Install the peripheral gasket and ignition coil gasket.
2. Apply liquid gasket to the specified point of cylinder head.
  1. Liquid gasket: Part No. 004403007
  2. THREE BOND 1215 or equivalent
  Fig 7: Applying Liquid Gasket To Cylinder Head
  Courtesy of SUBARU OF AMERICA, INC.
3. Install the rocker cover on cylinder head. Ensure the gasket is properly positioned during installation.
4. Tighten the rocker cover tightening bolt in alphabetical sequence shown in the figure, and then tighten to specified torque.
1. Tightening torque: 6.4 N.m (0.65 kgf-m, 4.7 ft-lb)
Fig 8: Tightening Rocker Cover Bolts
Courtesy of SUBARU OF AMERICA, INC.
Install the oil pipe.
1. Tightening torque: 29 N.m (3.0 kgf-m, 21.4 ft-lb)
Fig 9: Installing Oil Pipe
Courtesy of SUBARU OF AMERICA, INC.
Connect the oil flow control solenoid valve connector.

Fig 10: Connecting Oil Flow Control Solenoid Valve Connector
Courtesy of SUBARU OF AMERICA, INC.
Install the spark plug cord.
Similarly, install the parts on right-hand side.
Install the timing belt cover No. 2 (RH).
1. Tightening torque: 5 N.m (0.5 kgf-m, 3.6 ft-lb)
Fig 11: Installing Timing Belt Cover No 2 (RH)
Courtesy of SUBARU OF AMERICA, INC.
Install the timing belt cover No. 2 (LH).
1. Tightening torque: 5 N.m (0.5 kgf-m, 3.6 ft-lb)
Fig 12: Installing Timing Belt Cover No 2 (LH)
Courtesy of SUBARU OF AMERICA, INC.
Install the tensioner bracket.
1. Tightening torque: 25 N.m (2.5 kgf-m, 18.1 ft-lb)
Fig 13: Installing Tensioner Bracket
Courtesy of SUBARU OF AMERICA, INC.
Install the crank sprocket. < Ref. to INSTALLATION . >
Install the cam sprockets. < Ref. to INSTALLATION . >
Install the timing belt assembly. < Ref. to INSTALLATION . >
Install the timing belt cover. < Ref. to INSTALLATION . >
Install the crank pulley. < Ref. to INSTALLATION . >
Install the V-belt. < Ref. to INSTALLATION . >