Subaru Legacy IV (2008 year). Manual - part 20

PM-20

Timing Belt

PERIODIC MAINTENANCE SERVICES

7. Timing Belt

A: REPLACEMENT

1. 2.5 L NON-TURBO MODEL

1) Remove the radiator fan and A/C fan. <Ref. to
CO(H4SO)-24, REMOVAL, Radiator Main Fan and
Fan Motor.>
2) Protect the radiator with cardboard and blanket.
3) Remove the V-belts. <Ref. to ME(H4SO)-38, V-
belt.>
4) Remove the crank pulley. <Ref. to ME(H4SO)-
41, REMOVAL, Crank Pulley.>
5) Remove the timing belt cover. <Ref. to
ME(H4SO)-43, REMOVAL, Timing Belt Cover.>
6) Remove the timing belt guide. (MT model)

7) Use the ST to turn crankshaft. Align the mark (a)
of sprocket to the mark (b) of oil pump, and then en-
sure the right side cam sprocket mark (c), cam cap
and cylinder head matching surface (d) or left side
cam sprocket mark (e), timing belt cover notch (f)
are properly adjusted.
ST

499987500

CRANKSHAFT SOCKET

8) Remove the belt idler.

PM-00008

ME-00231

ST

(a)

(b)

(c)

(d)

(e)

(f)

ME-02387

PM-00521

PM-21

Timing Belt

PERIODIC MAINTENANCE SERVICES

9) Remove the belt idler No. 2.

10) Remove the timing belt.
11) Remove the automatic belt tension adjuster as-
sembly.

12) Install in the reverse order of removal. <Ref. to
ME(H4SO)-45, INSTALLATION, Timing Belt.>

2. 2.5 L TURBO MODEL

1) Remove the radiator fan and A/C fan. <Ref. to
CO(H4DOTC)-25, REMOVAL, Radiator Main Fan
and Fan Motor.>
2) Protect the radiator with cardboard and blanket.
3) Remove the V-belts. <Ref. to ME(H4DOTC)-41,
V-belt.>
4) Remove the crank pulley. <Ref. to
ME(H4DOTC)-44, REMOVAL, Crank Pulley.>
5) Remove the timing belt cover. <Ref. to
ME(H4DOTC)-46, REMOVAL, Timing Belt Cover.>
6) Remove the timing belt guide. (MT model)

PM-00010

PM-00011

PM-00008

ME-03124

ME-00728

ME-00729

PM-22

Timing Belt

PERIODIC MAINTENANCE SERVICES

7) Using ST, turn the crankshaft and align the align-
ment marks on crank sprocket and left and right
cam sprockets with notches of belt cover and oil
pump.
ST

499987500

CRANKSHAFT SOCKET

8) Remove the belt idler.

9) Remove the timing belt. 

10) Remove the automatic belt tension adjuster as-
sembly.

11) Install in the reverse order of removal. <Ref. to
ME(H4DOTC)-47, Timing Belt.>

CAUTION:
When installing the timing belt, be sure to align
all alignment marks on the belt with corre-
sponding marks on the sprockets. If incorrectly
installed, interference between pistons and
valves may occur.

ME-00231

ST

ME-00070

ME-03175

PM-00521

PM-00096

PM-23

Timing Belt

PERIODIC MAINTENANCE SERVICES

B: INSPECTION

1. 2.5 L NON-TURBO MODEL

1) Remove the timing belt cover (LH).
2) While cranking engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace the faulty timing belt as needed.
3) When the side part of timing belt is abnormally
worn (fluff or jumping out of core) or damaged,
check the idlers, tensioner, water pump pulley and
cam sprocket to determine idler alignment (square-
ness). Replace the worn timing belt with new part.

4) Install the timing belt cover (LH).

2. 2.5 L TURBO MODEL

1) Remove the timing belt cover (LH).
2) While cranking engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace faulty timing belts with new parts
as required.
3) When the side part of timing belt is abnormally
worn (fluff or jumping out of core) or damaged,
check the idlers, tensioner, water pump pulley and
cam sprocket to determine idler alignment (square-
ness). Replace the worn timing belt.

4) Install the timing belt cover (LH).

PM-00342

PM-00343