Section 4 (Engine Mechanical (H4DOTC - 2.5L DOHC Turbo)): Camshaft: Installation

WARNING: This page is about a different variant/trim than selected.

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° counterclockwise.

Fig 1: Identifying Valve Position
Courtesy of SUBARU OF AMERICA, INC.
Install the camshaft cap.
1. Apply small amount of liquid gasket to the mating surface of front camshaft cap and rear camshaft cap (RH side only).
  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) or equivalent
  
  Fig 2: Applying Liquid Gasket To Cap Mating Surface (1 Of 2)
  Courtesy of SUBARU OF AMERICA, INC.
  
  Fig 3: Applying Liquid Gasket To Cap Mating Surface (2 Of 2)
  Courtesy 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: 9.7 5 N.m (1.0 kgf-m, 7.2 ft-lb)
  
  T2: 20 N.m (2.0 kgf-m, 14.8 ft-lb)
  
  Fig 4: Identifying Camshaft Cap Bolts
  Courtesy of SUBARU OF AMERICA, INC.
4. After tightening the camshaft cap, ensure the camshaft rotates only slightly while holding it at base circle.
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

Fig 5: Identifying Oil Seal Guide ST1499587600 And Oil Seal Guide ST2 499597200
Courtesy of SUBARU OF AMERICA, INC.
Install the oil pipe to the front camshaft cap using the union bolt without filter (without protrusion).
Tightening torque:

29 N.m (3.0 kgf-m, 21.4 ft-lb)

Fig 6: Identifying Oil Pipe, Front Camshaft Cap And Union Bolt
Courtesy of SUBARU OF AMERICA, INC.
Install the tensioner bracket.
Tightening torque:

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

Fig 7: Identifying Tensioner Bracket
Courtesy of SUBARU OF AMERICA, INC.
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)

Fig 8: Identifying Timing Belt Cover No. 2 (RH) And Timing Belt Cover No. 2 Lh
Courtesy of SUBARU OF AMERICA, INC.
Install the cam sprocket. Ref. to INSTALLATION , Cam Sprocket.
Install the timing belt. Ref. to INSTALLATION , Timing Belt.
Adjust the valve clearance. Ref. to ADJUSTMENT , Valve Clearance.
Install the rocker cover.
1. Install the rocker cover gasket to the rocker cover. (Outer periphery 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) or equivalent
  
  Fig 9: Applying Liquid Gasket To Specified Point Of Cylinder Head
  Courtesy of SUBARU OF AMERICA, INC.
3. Install the rocker cover to cylinder head. 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)
  
  Fig 10: Identifying Rocker Cover Bolts In Sequence
  Courtesy of SUBARU OF AMERICA, INC.
Install the scavenge pump. Ref. to INSTALLATION , Scavenge Pump.
Connect the PCV hose and vacuum hose to the rocker cover.
NOTE: Use a new clamp for the PCV hose clamp, fit the cut out in the ST with the protrusion on the clamp as shown in the figure, and lock the clamp.

ST 18353AA000 CLAMP PLIERS

Fig 11: Identifying ST 18353AA000 Clamp Pliers
Courtesy of SUBARU OF AMERICA, INC.

Fig 12: Locating PCV Hose Clamp
Courtesy of SUBARU OF AMERICA, INC.
Install the ignition coil. Ref. to INSTALLATION , Ignition Coil.
Secure the engine harness or oil level switch harness to the rocker cover with the clip (A) and bolt (B).
Tightening torque:

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

Fig 13: Identifying Clip And Bolt
Courtesy of SUBARU OF AMERICA, INC.
Connect the connector to the oil level switch.

Fig 14: Locating Oil Level Switch Connector
Courtesy of SUBARU OF AMERICA, INC.
Connect the connectors to the intake oil flow control solenoid valve.

Fig 15: Locating Intake Oil Flow Control Solenoid Valve Connectors
Courtesy of SUBARU OF AMERICA, INC.
Connect the connectors to exhaust camshaft position sensor (A) and exhaust oil flow control solenoid valve (B).

Fig 16: Identifying Exhaust Camshaft Position Sensor And Exhaust Oil Flow Control Solenoid Valve Connectors
Courtesy of SUBARU OF AMERICA, INC.
Install the timing belt cover. Ref. to INSTALLATION , Timing Belt Cover.
Install the crank pulley. Ref. to INSTALLATION , Crank Pulley.