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 MANUALSSUBARU2008FORESTER F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSIGNITION SYSTEMSPARK PLUG
2008 Subaru Forester F4-2.5L DOHC Turbo
Spark Plug
2008 Subaru Forester F4-2.5L DOHC TurboSECTION Spark Plug
Spark plug
Thread diameter, pitch, length mm 14, 1.25, 26.5
Spark plug gap mm (in) 0.7 - 0.8 (0.028 - 0.031)
Tightening torque:
1. RH SIDE
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
2. LH SIDE
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
Thread diameter, pitch, length mm 14, 1.25, 26.5
Spark plug gap mm (in) 0.7 - 0.8 (0.028 - 0.031)
Tightening torque:
1. RH SIDE
Tightening torque: 21 N.m (2.1 kgf.m, 15.5 ft.lb)
2. LH SIDE
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.