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 Tribeca TouringFACTORY OEM SERVICE PROCEDURE

Spark Plug: Replacement

Remove the battery and battery carrier.
Remove the air cleaner case.
Detach the connector from ignition coil.
Remove the ignition coil.

Fig 1: Identifying Bracket And Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the spark plug with a spark plug socket.

Fig 2: Removing Spark Plug Using Spark Plug Socket
Courtesy of SUBARU OF AMERICA, INC.
Tighten the new spark plug lightly with hand, and then secure with a spark plug socket to the specified torque.
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.
Recommended spark plug:

NGK: SILFR6C11

Tightening torque:

21 N.m (2.1 kgf-m, 15.5 ft-lb)
Install the ignition coil.
Tightening torque:

16 N.m (1.6 kgf-m, 11.8 ft-lb)

Factory Service Tools

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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.