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.
2002 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE
Lubrication System: Lubrication: General Description: Specifications
Lubrication General Specifications Chart
| Lubrication method | Forced lubrication | ||||
| Oil pump | Pump type | Trochoid type | |||
| Number of teeth | Inner rotor | 9 | |||
| Outer rotor | 10 | ||||
| Outer rotor diameter x thickness | 78 x 9 mm (3.07 x 0.35 in) | ||||
| Tip clearance between inner and outer rotor | STANDARD | 0.04 - 0.14 mm (0.0016 - 0.0055 in) | |||
| LIMIT | 0.18 mm (0.0071 in) | ||||
| Side clearance between inner rotor and pump case | STANDARD | 0.02 - 0.07 mm (0.0008 - 0.0028 in) | |||
| LIMIT | 0.12 mm (0.0047 in) | ||||
| Case clearance between outer rotor and pump case | STANDARD | 0.10 - 0.175 mm (0.0039 - 0.0069 in) | |||
| LIMIT | 0.20 mm (0.0079 in) | ||||
| Capacity at 80°C (176°F) | 600 rpm | Discharge | - pressure | 98 kPa (1.0 kg/cm2 , 14 psi) | |
| - quantity | 4.6 l (4.9 US qt, 4.0 lmp qt)/min. | ||||
| 5,000 rpm | Discharge | - pressure | 294 kPa (3.0 kg/cm2 , 43 psi) | ||
| - quantity | 47.0 l (12.4 US gal, 10.3 lmp gal)/min. | ||||
| Relief valve operation pressure | 588 kPa (6.0 kg/cm2 , 85 psi) | ||||
| Oil filter | Type | Full-flow filter type | |||
| Filtration area | 1,000 cm2 (155 sq in) | ||||
| By-pass valve opening pressure | 157 kPa (1.6 kg/cm2 , 23 psi) | ||||
| Outer diameter x width | 80 x 70 mm (3.15 x 2.76 in) | ||||
| Oil filter to engine thread size | M 20 x 1.5 | ||||
| Relief valve (on rocker shaft) operation pressure | 69 kPa (0.7 kg/cm2 , 10 psi) | ||||
| Oil pressure switch | Type | Immersed contact point type | |||
| Working voltage - wattage | 12 V - 3.4 W or less | ||||
| Warning light activation pressure | 14.7 kPa (0.15 kg/cm2 , 2.1 psi) | ||||
| Proof pressure | More than 981 kPa (10 kg/cm2 , 142 psi) | ||||
| Oil capacity (at replacement) | 4.0 l (4.2 US qt, 3.5 lmp qt) | ||||
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.