Subaru Legacy 2005 Service Manual page 1594

MECHANICAL
20.Cylinder Head
A: REMOVAL
1) Remove the crank pulley. <Ref. to ME(H6DO)-
44, REMOVAL, Crank Pulley.>
2) Remove the front chain cover. <Ref. to
ME(H6DO)-45, REMOVAL, Front Chain Cover.>
3) Remove the timing chain assembly.
<Ref. to ME(H6DO)-47, REMOVAL, Timing Chain
Assembly.>
4) Remove the cam sprocket.
<Ref. to ME(H6DO)-52, REMOVAL, Cam Sprock-
et.>
5) Remove the crank sprocket.
<Ref. to ME(H6DO)-53, REMOVAL, Crank Sprock-
et.>
6) Remove the rear chain cover.
<Ref. to ME(H6DO)-54, REMOVAL, Rear Chain
Cover.>
7) Remove the camshaft. <Ref. to ME(H6DO)-56,
REMOVAL, Camshaft.>
8) Remove the cylinder head bolts in the numerical
order as shown in the figure.
Leave bolts (2) and (4) engaged by three or four
threads to prevent the cylinder head from falling.
(8)
(2)
(3)
(5)
9) While tapping the cylinder head with a plastic
hammer, separate it from cylinder block.
10) Remove the bolts (2) and (4) to remove the cyl-
inder head.
(8)
(2)
(3)
(5)
11) Remove the cylinder head gasket.
CAUTION:
Be careful not to scratch the mating surface of
cylinder head and cylinder block.
Cylinder Head
(6)
(4)
(1)
(7)
ME-02063
(6)
(4)
(1)
(7)
ME-02063
ME(H6DO)-60
12) Similarly, remove the cylinder head (RH).
B: INSTALLATION
1) Install the cylinder head and gaskets on cylinder
block.
CAUTION:
• Use new cylinder head gaskets.
• Be careful not to scratch the mating surface
of cylinder head and cylinder block.
2) Tighten the cylinder head bolts.
(1) Apply a coat of engine oil to washers and
cylinder head bolt threads.
(2) Install the cylinder head to cylinder block,
and then tighten the bolts with torque of 20 N⋅m
(2.0 kgf-m, 14 ft-lb) in numerical sequence as
shown in the figure.
(3) Tighten the bolts with torque of 50 N⋅m (5.1
kgf-m, 37 ft-lb) in numerical sequence as shown
in the figure.
(4) Back off all bolts by 180° in reverse order of
installation, and back them off again by 180°.
(5) Tighten the bolts with torque of 20 N⋅m (2.0
kgf-m, 14 ft-lb) in numerical sequence as shown
in the figure.
(6) Tighten the bolts (1) — (4) with torque of 48
N⋅m (4.9 kgf-m, 35.4 ft-lb) in numerical se-
quence.
(7) Tighten the bolts (5) — (8) with torque of 44
N⋅m (4.5 kgf-m, 33 ft-lb) in numerical sequence.
(8) Tighten the bolts 90° in the numerical order
as shown in the figure.
(9) Tighten the bolt (1) — (4) by 45° in the nu-
merical order.
(1)
(7)
(6)
(4)
3) Install the camshaft. <Ref. to ME(H6DO)-57, IN-
STALLATION, Camshaft.>
4) Install the rear chain cover. <Ref. to ME(H6DO)-
54, INSTALLATION, Rear Chain Cover.>
5) Install the crank sprocket.
<Ref. to ME(H6DO)-53, INSTALLATION, Crank
Sprocket.>
6) Install the cam sprocket.
<Ref. to ME(H6DO)-52, INSTALLATION, Cam
Sprocket.>
(3)
(5)
(8)
(2)
ME-02064