Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Subaru Outback F6-3.6L DOHCFACTORY OEM SERVICE PROCEDURE
Spark Plug: Service and Repair
Spark Plug
REMOVAL
Spark plug: Refer to "SPECIFICATION", General Description.
1. RH SIDE
1. Remove the collector cover.
NOTE: Follow the steps below when removing the collector cover.
1. Pull up the two points at the rear (A).
2. Pull up the two points at the front (B) while moving them forward.

2. Disconnect the ground cable from battery.
3. Remove the air cleaner case.
4. Remove the engine harness stay (A).
5. Disconnect the connector (B) from ignition coil.

6. Remove the ignition coil.
NOTE: Turn the #5 ignition coil to remove it.
7. Remove the spark plug with a spark plug socket.


2. LH SIDE
1. Remove the collector cover.
NOTE: Follow the steps below when removing the collector cover.
1. Pull up the two points at the rear (A).
2. Pull up the two points at the front (B) while moving them forward.

2. Remove the battery and battery carrier.
3. Remove the engine harness stay (A).
4. Disconnect the connector (B) from ignition coil.

5. Remove the ignition coil.
NOTE: Turn the #6 ignition coil to remove it.
6. Remove the spark plug with a spark plug socket.


INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque:
Spark plug: 21 N.m (2.1 kgf-m, 15.5 ft-lb)
Ignition coil; 16 N.m (1.6 kgf-m, 11.8 ft-lb)
Engine harness stay: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
2. LH SIDE
Install in the reverse order of removal.
Tightening torque:
Spark plug: 21 N.m (2.1 kgf-m, 15.5 ft-lb)
Ignition coil: 16 N.m (1.6 kgf-m, 11.8 ft-lb)
Engine harness stay: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
REMOVAL
Spark plug: Refer to "SPECIFICATION", General Description.
1. RH SIDE
1. Remove the collector cover.
NOTE: Follow the steps below when removing the collector cover.
1. Pull up the two points at the rear (A).
2. Pull up the two points at the front (B) while moving them forward.
2. Disconnect the ground cable from battery.
3. Remove the air cleaner case.
4. Remove the engine harness stay (A).
5. Disconnect the connector (B) from ignition coil.
6. Remove the ignition coil.
NOTE: Turn the #5 ignition coil to remove it.
7. Remove the spark plug with a spark plug socket.
2. LH SIDE
1. Remove the collector cover.
NOTE: Follow the steps below when removing the collector cover.
1. Pull up the two points at the rear (A).
2. Pull up the two points at the front (B) while moving them forward.
2. Remove the battery and battery carrier.
3. Remove the engine harness stay (A).
4. Disconnect the connector (B) from ignition coil.
5. Remove the ignition coil.
NOTE: Turn the #6 ignition coil to remove it.
6. Remove the spark plug with a spark plug socket.
INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque:
Spark plug: 21 N.m (2.1 kgf-m, 15.5 ft-lb)
Ignition coil; 16 N.m (1.6 kgf-m, 11.8 ft-lb)
Engine harness stay: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
2. LH SIDE
Install in the reverse order of removal.
Tightening torque:
Spark plug: 21 N.m (2.1 kgf-m, 15.5 ft-lb)
Ignition coil: 16 N.m (1.6 kgf-m, 11.8 ft-lb)
Engine harness stay: 6.4 N.m (0.7 kgf-m, 4.7 ft-lb)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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