Subaru 2009 IMPREZA, Service Manual

Page: 1126 / 3619

ME(H4DOTC)-68
Cylinder Head
MECHANICAL
13) While tapping the cylinder head with a plastic
hammer, separate it from cylinder block. Remove
the bolts (A) and (D) to remove cylinder head.
14) Remove the cylinder head gasket.
CAUTION:
Be careful not to scratch the mating surface of
cylinder head and cylinder block.
15) Similarly, remove the right side cylinder head.
B: INSTALLATION
1) Install the cylinder head and gaskets on cylinder
block.
CAUTION:
Be careful not to scratch the mating surface of
cylinder head and cylinder block.
NOTE:
Use a new cylinder head gasket.
2) Tighten the cylinder head bolts.
(1) Apply a thin coat of engine oil to washer and
bolt thread.
(2) Tighten all bolts to 29 N·m (3.0 kgf-m, 21.4
ft-lb) in alphabetical order.
(3) Retighten all bolts to 69 N·m (7.0 kgf-m,
50.9 ft-lb) in alphabetical order.
(4) Loosen all the bolts by 180° in the reverse
order of installing, and loosen them further by
180°.
(5) Tighten all bolts to 49 N·m (5.0 kgf-m, 36.1
ft-lb) in alphabetical order.
(6) Tighten all bolts by 80 to 90° in alphabetical
order.
(7) Tighten all bolts by 40 to 45° in alphabetical
order again.
CAUTION:
The tightening angle of the bolt should not ex-
ceed 45°.
(8) Tighten bolts (A) and (B) further by 40 — 45°.
CAUTION:
Make sure the total “re-tightening angle” of the
step (7) and (8) does not exceed 90°.
3) Install the oil level gauge guide. (LH side only)
Tightening torque:
6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
4) Install the camshaft. <Ref. to ME(H4DOTC)-62,
INSTALLATION, Camshaft.>
5) Install the oil pipe.
NOTE:
Be careful of the install location of the union screw;
the location will differ depending on whether or not
there is a filter.
Tightening torque:
T1: 8 N·m (0.8 kgf-m, 5.9 ft-lb)
T2: 29 N·m (3.0 kgf-m, 21.4 ft-lb)
ME-00122
(B) (C)
(D)
(E)
(F)
(A)
(A) Union screw with filter (with protrusion)
(B) Union screw without filter (without protrusion)
(C) Oil pipe
(D) Gasket
ME-00123
(B)
(C)
(D) (E)
(F) (A)
ME-03920
(A)
(B)
(C)
(D)
(D)
T2
T1
T1
T2
T2
T2
(A)
(B)
(C)
(D)
(D)
(D)