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.
2006 Subaru Forester X, AutomaticFACTORY OEM SERVICE PROCEDURE
General Information: Specifications: Engine
FORESTER ENGINE SPECIFICATION
| Model | 2.5 L Non-turbo | 2.5 L Turbo | |
|---|---|---|---|
| Engine type | Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine | ||
| Valve system mechanism | Method | SOHC | DOHC |
| Number of valves | Intake 2/Exhaust 2 | ||
| Bore x stroke | mm (in) | 99.5 x 79 (3.92 x 3.11) | |
| Displacement | cm3 (cu in) | 2,457 (149.94) | |
| Compression ratio | 10.0±0.2 | 8.4±0.2 | |
| Ignition order | 1-3-2-4 | ||
| Idling speed [at neutral position on MT, or "P" or "N" position on AT] | rpm | MT:650±100 AT: 700 ±100 | 700±100 |
| Maximum output | kW (HP)/rpm | 129 (173)/6,000 | 172 (230)/5,600 |
| Maximum torque | N.m (kgf-m, ft-lb)/rpm | 226 (23.0, 166)/4,400 | 319 (32.5, 235) /3,600 |
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.