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.
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HOMESERVICE MANUALSSUBARU2010OUTBACK SPORT F4-2.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIR
2010 Subaru Outback Sport F4-2.5L SOHC
Spark Plug: Service and Repair
2010 Subaru Outback Sport F4-2.5L SOHCSECTION Service and Repair
Spark Plug
REMOVAL
Spark plug:
Refer to "SPECIFICATION" for the spark plug.
1. RH SIDE
1. Disconnect the ground cable from the battery.
2. Remove the air cleaner case.
3. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.)
4. Remove the spark plug with a spark plug socket.
2. LH SIDE
1. Remove the battery.
2. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.)
3. Remove the spark plug with a spark plug socket.
INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
2. LH SIDE
Install in the reverse order of removal.
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
REMOVAL
Spark plug:
Refer to "SPECIFICATION" for the spark plug.
1. RH SIDE
1. Disconnect the ground cable from the battery.
2. Remove the air cleaner case.
3. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.)
4. Remove the spark plug with a spark plug socket.
2. LH SIDE
1. Remove the battery.
2. Remove the spark plug cords by pulling the boot. (Do not pull the cord itself.)
3. Remove the spark plug with a spark plug socket.
INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
2. LH SIDE
Install in the reverse order of removal.
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.