Subaru Legacy IV (2008 year). Manual - part 18

PM-12

Engine Oil Filter

PERIODIC MAINTENANCE SERVICES

4. Engine Oil Filter

A: REPLACEMENT

1) Remove the service hole clip located on the un-
der cover.
• 2.5 L model

• 3.0 L model

2) Rotate the service hole cover in the arrow direc-
tion.
• 2.5 L model

• 3.0 L model

3) Remove the oil filter using ST.
• 3.0 L model
ST

49857000

OIL FILTER WRENCH (Outer 
diameter: 80 mm (3.15 in))

• 2.5 L model
ST

18332AA000

OIL FILTER WRENCH (Outer 
diameter: 68 mm (2.68 in))

General tool

OIL FILTER WRENCH (65/67 
mm 14 Flutes) (Outer diame-
ter: 67.4 mm (2.65 in))

NOTE:
However, in 2.5L model, SUBARU genuine oil filter
having outer diameter of 68 mm (2.68 in) or 67.4
mm (2.65 in) can also be used.
• 2.5 L model

• 3.0 L model

CAUTION:
If the engine oil is spilt over exhaust pipe or the
under cover, wipe it off with cloth to avoid emit-
ting smoke or causing a fire.
4) Clean the oil filter installation surface on cylinder
block and oil cooler.
5) Obtain a new oil filter and apply a thin coat of en-
gine oil to the seal rubber.

PM-00324

PM-00281

PM-00325

PM-00282

PM-00326

PM-00283

PM-13

Engine Oil Filter

PERIODIC MAINTENANCE SERVICES

6) To install the oil filter, turn the filter by hand while
being careful not to damage the seal rubber. When
the seal rubber just touches the oil cooler, tighten
by using a torque wrench or turn the filter by the
specified amount.
• 3.0 L model
Oil filter 80 mm (3.15 in) in outer diameter
14 N·m (1.4 kgf-m, 10.3 ft-lb) or tighten 3/4 rotation.
• 2.5 L model
Oil filter 68 mm (2.68 in) in outer diameter 14 N·m
(1.4 kgf-m, 10.3 ft-lb) or tighten 1 rotation. Oil filter
67.4 mm (2.65 in) in outer diameter 12 N·m (1.2
kgf-m, 8.9 ft-lb) or tighten approx. 7/8 rotation.

CAUTION:
Do not tighten excessively, or oil may leak.
7) Replace the service hole cover in the original po-
sition.
8) After installing the oil filter, run the engine and
make sure that no oil is leaking around seal rubber.
9) Check the engine oil level. <Ref. to PM-11, IN-
SPECTION, Engine Oil.>

NOTE:
The filter element and filter case are permanently
jointed, therefore, interior cleaning is not neces-
sary.

PM-14

Spark Plug

PERIODIC MAINTENANCE SERVICES

5. Spark Plug

A: REPLACEMENT

1. 2.5 L NON-TURBO MODEL

1) Remove the intake duct and intake chamber.
2) Remove the battery. 
3) Disconnect the spark plug cord.
4) Remove the spark plug with a spark plug socket.

5) Tighten the new spark plug lightly with hand, and
then secure with a spark plug socket to the speci-
fied torque.

Recommended spark plug:

<Ref. to SPC-3, ELECTRICAL, LEGACY.>

Tightening torque:

21 N·m (2.1 kgf-m, 15.5 ft-lb)

NOTE:
• Be sure to place the gasket between the cylinder
head and spark plug.
• If the torque wrench is not available, tighten the
spark plug until gasket contacts cylinder head, then
tighten further 1/4 to 1/2 turns.

2. 2.5 L TURBO MODEL

• RH side

1) Remove the collector cover and the engine side
cover.
2) Disconnect the ground cable from battery.

3) Remove the air cleaner case. <Ref. to
IN(H4DOTC)-8, REMOVAL, Air Cleaner Case.>
4) Disconnect the connector from ignition coil.
5) Remove the ignition coil.

NOTE:
Turn #3 ignition coil by 180 degrees to remove it.

6) Remove the spark plug with a spark plug socket.
7) Install in the reverse order of removal.

Recommended spark plug:

<Ref. to SPC-3, ELECTRICAL, LEGACY.>

Tightening torque (Spark plug):

21 N·m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil):

16 N·m (1.6 kgf-m, 11.8 ft-lb)

PM-00001

IN-00203

IG-00092

PM-15

Spark Plug

PERIODIC MAINTENANCE SERVICES

• LH side

1) Remove the collector cover and the engine side
cover.
2) Remove the battery and battery carrier.
3) Remove the secondary air pump. <Ref. to
EC(H4DOTC)-21, REMOVAL, Secondary Air
Pump.>
4) Remove the bolts that attach the air pump duct
to the rocker cover LH, and raise the air pump duct.

5) Disconnect the connector from ignition coil.
6) Remove the ignition coil.

NOTE:
Turn #4 ignition coil by 180 degrees to remove it.

7) Remove the spark plug with a spark plug socket.
8) Install in the reverse order of removal.

Tightening torque (Spark plug):

21 N·m (2.1 kgf-m, 15.5 ft-lb)

Tightening torque (Ignition coil):

16 N·m (1.6 kgf-m, 11.8 ft-lb)

Tightening torque (Air pump duct):

9 N·m (0.9 kgf-m, 6.6 ft-lb)

3. 3.0 L MODEL

• RH side

1) Remove the collector cover and the engine side
cover.
2) Disconnect the ground cable from battery.

3) Remove the air cleaner case. <Ref. to
IN(H6DO)-5, REMOVAL, Air Cleaner Case.>
4) Remove the bracket (A).
5) Disconnect the connector (B) from ignition coil.

6) Remove the ignition coil.

NOTE:
Turn the #5 ignition coil to remove it.

IG-02072

IG-02073

IN-00203

IG-02004

(B)

(A)