Engine Lubrication System (H4SO): General Description: Specification
- Non-turbo model
| Lubrication method | Forced lubrication | ||||
| Oil pump | Pump type | Trochoid type | |||
| Number of teeth | Inner rotor | 9 | |||
| Outer rotor | 10 | ||||
| Outer rotor diameter x thickness | mm (in) | 76 x 10 (2.99 x 0.39) | |||
| Tip clearance between inner and outer rotors | mm (in) | Standard | 0.04 - 0.14 (0.0016 - 0.0055) | ||
| Case clearance between outer rotor and pump case | mm (in) | Standard | 0.10 - 0.175 (0.0039 - 0.0069) | ||
| Side clearance between inner rotor and pump case | mm (in) | Standard | 0.02 - 0.07 (0.0008 - 0.0028) | ||
| Relief valve spring | Free length | mm (in) | 73.7 (2.902) | ||
| Installed length | mm (in) | 54.7 (2.154) | |||
| Load when installed | N (kgf, lbf) | 93.1 (9.49, 20.93) | |||
| Performance (Oil temperature 80°C (176°F)) | 600 RPM | Discharge pressure | kPa (kgf/cm2 , psi) | 98 (1.0, 14) | |
| Discharge rate | l (US qt, Imp qt)/min. | 4.6 (4.9, 4.0) or more | |||
| 5, 000 RPM | Discharge pressure | kPa (kgf/cm2 , psi) | 294 (3.0, 43) | ||
| Discharge rate | l (US qt, Imp qt)/min. | 47.0 (49.7, 41.4) or more | |||
| Relief valve working pressure | kPa (kgf/cm2 , psi) | 588 (6.0, 85) | |||
| Oil filter | Filter type | Full-flow filter type | |||
| Filtration area | cm2 (sq in) | Outer diameter: 68 mm (2.68 in) (Black) | 800 (124) | ||
| Outer diameter: 67.4 mm (2.65 in) (Blue) | 555 (86) | ||||
| By-pass valve opening pressure | kPa (kgf/cm2 , psi) | 160 (1.63, 23.2) | |||
| Outer diameter x width | mm (in) | Outer diameter: 68 mm (2.68 in) (Black) | 68 x 65 (2.68 x 2.56) | ||
| Outer diameter: 67.4 mm (2.65 in) (Blue) | 67.4 x 65.3 (2.65 x 2.57) | ||||
| Installation screw specifications | M 20 x 1.5 | ||||
| Oil pressure switch | Type | Immersed contact point type | |||
| Operating voltage - power consumption | 12 V - 3.4 W or less | ||||
| Warning light operating pressure | kPa (kgf/cm2 , psi) | 14.7 (0.15, 2.1) | |||
| Proof pressure | kPa (kgf/cm2 , psi) | 981 (10, 142) or more | |||
| Engine oil | Total capacity (at overhaul) | l (US qt, Imp qt) | 4.8 (5.1, 4.2) | ||
| When replacing engine oil and oil filter | l (US qt, Imp qt) | 4.2 (4.4, 3.7) | |||
| When replacing engine oil only | l (US qt, Imp qt) | 4.0 (4.2, 3.5) | |||
Recommended oil:
CAUTION:
It is acceptable to fill an engine with oil of another brand when replacing the oil, but make sure to use following oil specified by Subaru.
| Engine oil standard | SAE viscosity No. | ||
|---|---|---|---|
|
For API standard, oil with SM "Energy Conserving" or SN "Resource Conserving" logo. |
or |
Those with the ILSAC standard GF-4 or GF-5 "starburst mark" displayed on top of the container. |
5W-30 (synthetic oil) |
NOTE:
The proper viscosity oil helps the engine maintain its ideal temperature, and cranking speed increased by reducing viscosity friction in hot condition.
- Turbo model
| Lubrication method | Forced lubrication | ||||
| Oil pump | Pump type | Trochoid type | |||
| Number of teeth | Inner rotor | 9 | |||
| Outer rotor | 10 | ||||
| Outer rotor diameter x thickness | mm (in) | 78 x 11 (3.07 x 0.43) | |||
| Tip clearance between inner and outer rotors | mm (in) | Standard | 0.04 - 0.14 (0.0016 - 0.0055) | ||
| Case clearance between outer rotor and pump case | mm (in) | Standard | 0.10 - 0.175 (0.0039 - 0.0069) | ||
| Side clearance between inner rotor and pump case | mm (in) | Standard | 0.02 - 0.07 (0.0008 - 0.0028) | ||
| Relief valve spring | Free length | mm (in) | 73.7 (2.902) | ||
| Installed length | mm (in) | 54.7 (2.154) | |||
| Load when installed | N (kgf, lbf) | 93.1 (9.49, 20.93) | |||
| Performance (Oil temperature 80°C (176°F)) | 600 RPM | Discharge pressure | kPa (kg/cm2 , psi) | 98 (1.0, 14) | |
| Discharge rate | l (US qt, Imp qt)/min. | 6.4 (6.8, 5.6) or more | |||
| 6, 000 RPM | Discharge pressure | kPa (kg/cm2 , psi) | 392 (4.0, 56.8) | ||
| Discharge rate | l (US qt, Imp qt)/min. | 63.0 (66.6, 55.4) or more | |||
| Relief valve working pressure | kPa (kg/cm2 , psi) | 538 (5.5, 78) | |||
| Oil filter | Filter type | Full-flow filter type | |||
| Filtration area | cm2 (sq in) | Outer diameter: 68 mm (2.68 in) (Black) | 800 (124) | ||
| Outer diameter: 67.4 mm (2.65 in) (Blue) | 555 (86) | ||||
| By-pass valve opening pressure | kPa (kg/cm2 , psi) | 160 (1.63, 23.2) | |||
| Outer diameter x width | mm (in) | Outer diameter: 68 mm (2.68 in) (Black) | 68 x 65 (2.68 x 2.56) | ||
| Outer diameter: 67.4 mm (2.65 in) (Blue) | 67.4 x 65.3 (2.65 x 2.57) | ||||
| Installation screw specifications | M 20 x 1.5 | ||||
| Oil pressure switch | Type | Immersed contact point type | |||
| Operating voltage - power consumption | 12 V - 3.4 W or less | ||||
| Warning light operating pressure | kPa (kg/cm2 , psi) | 14.7 (0.15, 2.1) | |||
| Proof pressure | kPa (kg/cm2 , psi) | 981 (10, 142) or more | |||
| Engine oil | Total capacity (at overhaul) | l (US qt, Imp qt) | 5.2 (5.5, 4.6) | ||
| When replacing engine oil and oil filter | l (US qt, Imp qt) | 4.3 (4.5, 3.8) | |||
| When replacing engine oil only | l (US qt, Imp qt) | 4.0 (4.2, 3.5) | |||
Required oil:
CAUTION:
- Use 5W-30 (synthetic oil).
- It is acceptable to fill an engine with oil of another brand when replacing the oil, but make sure to use following oil specified by Subaru.
| Engine oil standard | SAE viscosity No. | ||
|---|---|---|---|
|
For API standard, oil with SM "Energy Conserving" or SN "Resource Conserving" logo. |
or |
Those with the ILSAC standard GF-4 or GF-5 "starburst mark" displayed on top of the container. |
5W-30 (synthetic oil) |
NOTE:
The proper viscosity oil helps the engine maintain its ideal temperature, and cranking speed increased by reducing viscosity friction in hot condition.