Engine Lubrication System (H4DOTC): General Description: Specification
LUBRICATION 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 | 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, lmp qt)/min. | 4.6 (4.9, 4.0) or more | |||
| 5, 00 rpm | Discharge pressure | kPa (kgf/cm2 , psi) | 294 (3.0, 43) | ||
| Discharge rate | l (US qt, lmp 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, lmp qt) | 5.0 (5.3, 4.4) | ||
| When replacing engine oil and oil filter | l (US qt, lmp qt) | 4.2 (4.4, 3.7) | |||
| When replacing engine oil only | l (US qt, lmp qt) | 4.0 (4.2, 3.5) | |||
Recommended 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 an oil with an API standard and SAE viscosity number specified by Subaru.
NOTE:
The proper viscosity oil helps the engine maintain its ideal temperature, and cranking speed increased by reducing viscosity friction in hot condition.