Cylinder Head Assembly: Installation

Install cylinder head and gaskets on cylinder block.
CAUTION:
- Use new cylinder head gaskets.
- Be careful not to scratch the mating surface of cylinder block and cylinder head.
Tighten cylinder head bolts.
1. Apply a coat of engine oil to washers and bolt threads.
2. Tighten all bolts to 29 N.m (3.0 kgf-m, 22 ft-lb) in alphabetical sequence.
  Then tighten all bolts to 69 N.m (7.0 kgf-m, 51 ft-lb) in alphabetical sequence.
3. Back off all bolts by 180° first; back them off by 180° again.
4. Tighten bolts (a) and (b) to 34 N.m (3.5 kgf-m, 25 ft-lb).
5. Tighten bolts (c), (d), (e) and (f) to 15 N.m (1.5 kgf-m, 11 ft-lb).
6. Tighten all bolts by 80 to 90° in alphabetical sequence.
  CAUTION: Do not tighten bolts more than 90°.
7. Further tighten all bolts by 80 to 90° in alphabetical sequence shown in figure below.
  CAUTION: Ensure that the total "re-tightening angle" [in the former two steps], do not exceed 180°.
Fig 1: Tightening Cylinder Head Bolts
Courtesy of SUBARU OF AMERICA, INC.
Install camshaft. Refer to INSTALLATION under CAMSHAFT .
Install valve rocker assembly. Refer to INSTALLATION under VALVE ROCKER ASSEMBLY .
Install A/C compressor bracket on cylinder head.
Install intake manifold. Refer to INSTALLATION under INTAKE MANIFOLD .
Install camshaft sprocket. Refer to INSTALLATION under CAMSHAFT SPROCKET .
Install timing belt assembly. Refer to INSTALLATION under TIMING BELT ASSEMBLY .
Install belt cover. Refer to INSTALLATION under BELT COVER .
Install crankshaft pulley. Refer to INSTALLATION under CRANKSHAFT PULLEY .
Install V-belt. Refer to INSTALLATION under V-BELT .