Section 3 (Engine Mechanical (STI)): Camshaft: Installation

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.

Intake camshaft LH: 

Rotate 80° clockwise. 

Exhaust camshaft LH: 

Rotate 45° counterclockwise. 

Fig 1: Identifying Intake And Exhaust Camshaft Rotation Angles

Courtesy of SUBARU OF AMERICA, INC.

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) 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) 

   Fig 2: Identifying Liquid Gasket Dimensions And Ranges

   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: 9.75 N.m (1.0 kgf-m, 7.2 ft-lb) 

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

   Fig 3: Camshaft Caps Tightening Sequence

   Courtesy of SUBARU OF AMERICA, INC.
4. After tightening the camshaft cap, ensure the camshaft rotates only slightly while holding it at base circle.

ST1 499587600 OIL SEAL INSTALLER

ST2 499597200 OIL SEAL GUIDE

Fig 4: Installing Oil Seal On Camshaft Using Oil Seal Installer (499587600)

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Tightening torque: 

29 N.m (3.0 kgf-m, 21.4 ft-lb) 

Fig 5: Identifying Oil Pipes, Gasket And Union Bolts

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Tightening torque: 

24.5 N.m (2.5 kgf-m, 18.1 ft-lb) 

Fig 6: Locating Tensioner Bracket Bolts

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Tightening torque: 

5 N.m (0.5 kgf-m, 3.7 ft-lb) 

Fig 7: Identifying Timing Belt Cover Bolts

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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) or equivalent 

   Fig 8: Identifying Rocker Cover Liquid Gaskets

   Courtesy 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) 

   Fig 9: Rocker Cover Bolts Tightening Sequence

   Courtesy of SUBARU OF AMERICA, INC.

ST 18353AA000 CLAMP PLIERS

Fig 10: Fitting Clamp Pliers (18353AA000) Cut Out To Clamp Protrusion

Courtesy of SUBARU OF AMERICA, INC.

Fig 11: Identifying PCV And Vacuum Hoses

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Tightening torque: 

6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

Fig 14: Identifying Rocker Cover LH Air Ducts

Courtesy of SUBARU OF AMERICA, INC.