STI Model
WARNING: This page is about a different car, the 2013 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
| 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, lmp 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) | 5.0 (5.3, 4.4) | |||
| 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) | ||||