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Home >> Subaru >> 2008 >> Impreza F4-2.5L SOHC >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> Cylinder Head Assembly >> System Specifications
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System Specifications

Cylinder head
Surface warpage limit (Mating surface with cylinder block) 0.035 mm (0.0014 in)
Grinding limit 0.1 mm (0.004 in)
Standard height 97.5 mm (3.84 in)

Tighten all bolts to 29 N-m (3.0 kgf-m, 21.4 ft-lb) in alphabetical order.
Tighten all bolts to 69 N-m (7.0 kgf-m, 50.9 ft-lb) in alphabetical order.
Loosen all the bolts by 180 degrees in the reverse order of installing, and loosen them further by 180 degrees.
Tighten all bolts to 42 N-m (4.3 kgf-m, 31.0 ft-lb) in alphabetical order.
Tighten all bolts by 80 to 90 degrees in alphabetical order.
Tighten all bolts by 40 to 45 degrees in alphabetical order.
Further tighten the bolts (a) and (b) by 40-45 degrees





Camshaft bearing cap








Camshaft sprocket