SUBARU LEGACY 1997 Service Repair Manual

G6M0095
1. #1 SPARK PLUG
1) Disconnect battery ground cable.
B6M0552A
2) Remove #1 spark plug cord by pulling boot, not cord
itself.
B6M0553
3) Remove spark plug with the spark plug socket.
4) Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
G6M0095
2. #2 SPARK PLUG
1) Disconnect battery ground cable.
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6-1SERVICE PROCEDURE
3. Spark Plug

B6M0554
2) Remove battery.
B6M0555A
3) Remove #2 spark plug cord by pulling boot, not cord
itself.
B6M0556
4) Remove spark plug with the spark plug socket.
5) Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
G6M0095
3. #3 SPARK PLUG
1) Disconnect battery ground cable.
26
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0557A
2) Disconnect mass air flow sensor connector.
3) Remove four clips securing air cleaner upper cover.
B6M0558
4) Loosen the clamp screw and separate air cleaner upper
cover from air intake duct.
5) Remove air cleaner element.
B6M0559A
6) Remove #3 spark plug cord by pulling boot, not cord
itself.
B6M0560
7) Remove spark plug with the spark plug socket.
8) Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
27
6-1SERVICE PROCEDURE
3. Spark Plug

G6M0095
4. #4 SPARK PLUG
1) Disconnect battery ground cable.
B6M0554
2) Remove battery.
B6M0561
3) Remove washer tank mounting bolts.
B6M0562A
4) Disconnect washer tank connectors.
CAUTION:
Do not disconnect washer tank hoses as washer fluid
will leak out from washer tank.
B6M0575A
5) Move washer tank upward.
28
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0563A
6) Remove #4 spark plug cord by pulling boot, not cord
itself.
B6M0564
7) Remove spark plug with the spark plug socket.
8) Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
CAUTION:
The above torque should be only applied to new spark
plugs without oil on their threads.
In case their threads are lubricated, the torque should
be reduced by approximately 1/3 of the specified
torque in order to avoid over-stressing.
E: REMOVAL (2500 cc OUTBACK MODEL)
CAUTION:
All spark plugs installed on an engine, must be of the
same heat range.
Spark plug:
NGK: PFR5B-11
G6M0095
1. #1 SPARK PLUG
1) Disconnect battery ground cable.
29
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0557A
2) Disconnect mass air flow sensor connector.
3) Remove four clips securing air cleaner upper cover.
B6M0558
4) Loosen the clamp screw and separate air cleaner upper
cover from air intake duct.
B6M0565A
5) Remove air cleaner element and air cleaner case.
B6M0566A
6) Remove #1 spark plug cord by pulling boot, not cord
itself.
B6M0567A
7) After connecting
1spark plug socket,
2extension and


3Universal Joint to each other, securely set them over the
spark plug in cylinder head.
8) Cover ABS pipes with rag to prevent damage.


1Spark plug socket 16 mm (5/8 in)


2Extension


3Universal Joint


4Extension


5Ratchet
30
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0568A
NOTE:
Length L1 is important in making for easy removal.
It may be necessary to wrap points A and B with vinyl
tape to prevent them separating while working.
If they do separate, spark plug socket is left on the spark
plug and it is very difficult to remove.
An approximately 250 mm (9.84 in) long extension is
recommended to be connected to ratchet.
For spark plug socket, extension and Universal Joint, it
is recommended to use the following tools.
Spark plug socket : PROTO 5020-50
Extension : SNAP-ON FX1
Universal Joint : SNAP-ON FU80B
B6M0569A
9) Set
4extension and
5ratchet in turn onto the con-
nected tools in plug hole, and remove spark plug using
them.
G6M0095
2. #2 SPARK PLUG
1) Disconnect battery ground cable.
B6M0554
2) Remove battery.
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6-1SERVICE PROCEDURE
3. Spark Plug

B6M0555A
3) Remove #2 spark plug cord by pulling boot, not cord
itself.
4) For subsequent procedures, refer to the procedure for
#1 spark plug.
CAUTION:
When removing spark plug, cover the ATF cooling
pipes with a rag to prevent damage.
G6M0095
3. #3 SPARK PLUG
1) Disconnect battery ground cable.
B6M0557A
2) Disconnect mass air flow sensor connector.
3) Remove four clips securing air cleaner upper cover.
B6M0558
4) Loosen the clamp screw and separate air cleaner upper
cover from air intake duct.
B6M0565A
5) Remove air cleaner element and air cleaner case.
32
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0570A
6) Remove #3 spark plug cord by pulling boot, not cord
itself.
7) For subsequent procedures, refer to the procedure for
#1 spark plug.
G6M0095
4. #4 SPARK PLUG
1) Disconnect battery ground cable.
B6M0554
2) Remove battery.
B6M0561
3) Remove washer tank mounting bolts.
B6M0562A
4) Disconnect washer tank connectors.
CAUTION:
Do not disconnect washer tank hoses as washer fluid
will leak out from washer tank.
33
6-1SERVICE PROCEDURE
3. Spark Plug

B6M0575A
5) Move washer tank upward.
B6M0563A
6) Remove #4 spark plug cord by pulling boot, not cord
itself.
7) For subsequent procedures, refer to the procedure for
#1 spark plug.
CAUTION:
When removing spark plug, cover the ATF cooling
pipes with a rag to prevent damage.
B6M0572A
NOTE:
For easier removal of spark plug, diagonally insert the tools
from the direction of battery stand into plug hole as shown
in figure.
B6M0573
F: INSTALLATION (2500 cc OUTBACK
MODEL)
1. #1 SPARK PLUG
1) After setting spark plug in spark plug socket, connect
the spark plug socket, extension and Universal Joint to
each other.
2) Screw spark plug into cylinder head using the con-
nected tools above mentioned. At this point, it is necessary
to support the rear end of the tools with fingertips.
3) When spark plug is screwed in two or three turns, tem-
porarily disconnect the tools connected in step 1) above.
4) Confirm that spark plug is screwed into the cylinder
head properly by touching it with finger. If it is difficult to
reach it by hand, confirm its condition by using mirror and
suchlike.
5) Cover ABS pipes with rag to prevent damage.
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6-1SERVICE PROCEDURE
3. Spark Plug