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.
2009 Subaru Outback F6-3.0L DOHCFACTORY OEM SERVICE PROCEDURE
Piston, Engine
Piston
Outer diameter
Standard
A 89.205 - 89.215 mm (3.5120 - 3.5124 in)
B 89.195 - 89.205 mm (3.5116 - 3.5120 in)
0.25 mm (0.0098 in) OS 89.445 - 89.465 mm (3.5215 - 3.5222 in)
0.50 mm (0.0197 in) OS 89.695 - 89.715 mm (3.5313 - 3.5321 in)
Inner diameter of piston pin hole Standard 22.000 - 22.006 mm (0.8661 - 0.8664 in)
Outer diameter
Standard
A 89.205 - 89.215 mm (3.5120 - 3.5124 in)
B 89.195 - 89.205 mm (3.5116 - 3.5120 in)
0.25 mm (0.0098 in) OS 89.445 - 89.465 mm (3.5215 - 3.5222 in)
0.50 mm (0.0197 in) OS 89.695 - 89.715 mm (3.5313 - 3.5321 in)
Inner diameter of piston pin hole Standard 22.000 - 22.006 mm (0.8661 - 0.8664 in)
Factory Service Tools
Use the Manual With the Right Hardware
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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.