Cylinder Head: Installation

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

Install the cylinder head to the cylinder block.
CAUTION: Be careful not to scratch the mating surface of cylinder head and cylinder block.

NOTE: Use a new cylinder head gasket.
1. Clean the bolt threads and the bolt holes in the cylinder block.
  CAUTION: To avoid erroneous tightening of the bolts, clean out the bolt holes sufficiently by blowing with compressed air to eliminate engine coolant etc.
2. Apply a sufficient coat of engine oil to the washer and bolt thread.
3. Tighten all bolts to 40 N.m (4.1 kgf-m, 29.5 ft-lb) in alphabetical order.
4. Retighten all bolts to 95 N.m (9.7 kgf-m, 70.1 ft-lb) in alphabetical order.
  CAUTION: If the bolt makes stick-slip sound during tightening, repeat the procedure from step 1. In this case, the cylinder head gasket can be reused.
5. Loosen all the bolts by 180° in the reverse order of installing, and loosen them further by 180°.
6. Tighten all bolts to 10 N.m (1.0 kgf-m, 7.4 ft-lb) in alphabetical order.
7. Retighten all bolts to 30 N.m (3.1 kgf-m, 22.1 ft-lb) in alphabetical order.
8. Retighten all bolts to 70 N.m (7.1 kgf-m, 51.6 ft-lb) in alphabetical order.
9. Retighten all bolts by 80 - 90° in alphabetical order.
10. Retighten all bolts by 40 - 45° in alphabetical order.
  CAUTION: The tightening angle of the bolt should not exceed 45°.
11. Retighten bolts (A) and (B) by 40 - 45°.
  CAUTION: Make sure the total "tightening angle" of steps 10 and 11 does not exceed 90°.
  
  Fig 1: Water Pump Bolts Tightening Sequence
  Courtesy of SUBARU OF AMERICA, INC.
Install the oil level gauge guide. (LH side only)
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
Install the camshaft. <Ref. to INSTALLATION , Camshaft.>
Install the oil pipe. <Ref. to INSTALLATION , Oil Pipe.>
Install the A/C compressor bracket on cylinder head.
Tightening torque:

36 N.m (3.7 kgf-m, 26.6 ft-lb)
Install the secondary air combination valve. <Ref. to INSTALLATION , Secondary Air Combination Valve.>
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 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 2: 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 3: Rocker Cover Bolts Tightening Sequence
  Courtesy of SUBARU OF AMERICA, INC.
Connect the PCV hose (A) and vacuum hose (B) to the rocker cover.
NOTE: Use a new 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 4: Fitting Clamp Pliers (18353AA000) Cut Out To Clamp Protrusion
Courtesy of SUBARU OF AMERICA, INC.

Fig 5: Identifying PCV And Vacuum Hoses
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.>
Install the intake manifold. <Ref. to INSTALLATION , Intake Manifold.>
Install the rear side belt. <Ref. to REAR SIDE BELT , INSTALLATION, V-belt.>
Install the engine to the vehicle. <Ref. to INSTALLATION , Engine Assembly.>