Power Steering System: General Description: Specification
| Model | STI model | Except for STI model | |||
| Whole system | Minimum turning radius | m (ft) | 5.5 (18) | ||
| Steering angle | Inner wheel | 36.6°±1.5° | |||
| Outer wheel | 32.2°±1.5° | ||||
| Steering wheel diameter | mm (in) | 375 (14.76) | |||
| Whole gear ratio (Turn, from lock to lock. Gearbox) | 2.8 | ||||
| Gearbox | Type | Rack and Pinion, Integral | |||
| Backlash | 0 (Automatic adjusting) | ||||
| Valve (Power steering system) | Rotary valve | ||||
| Pump (Power steering system) | Type | Vane pump | |||
| Oil tank | Installed on body | ||||
| Specific output | cm3 (cu in)/rev. | 8.5 (0.519) | |||
| Relief pressure | kPa (kgf/cm2 , psi) | 8, 300 - 9, 000 (85 - 92, 1, 203 - 1, 305) | 8, 100 - 8, 800 (83 - 90, 1, 174 - 1, 276) | ||
| Hydraulic fluid control | Engine speed sensitive | ||||
| Hydraulic fluid | L (US qt, Imp qt) | 1, 000 RPM: 6.3 (6.7, 5.5) 3, 000 RPM: 5.9 (6.2, 5.2) |
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| RPM range | RPM | 680 - 9, 600 | |||
| Direction of rotation | Clockwise | ||||
| Hydraulic oil (Power steering system) | Capacity L (US qt, Imp qt) | Oil tank | 0.2 (0.2, 0.2) | ||
| Whole system | 0.7 (0.7, 0.6) | ||||
| Steering wheel | Free play | mm (in) | 17 (0.67) | ||
| Steering shaft | Clearance between the steering wheel and column cover | mm (in) | 2 - 4 (0.08 - 0.16) | ||
| Steering gearbox (Power steering system) | Sliding resistance | N (kgf, lbf) | 300 (31, 67) or less Difference between right and left sliding resistance: 20% or less | ||
| Rack shaft play in the radial direction | Right-turn steering | mm (in) | 0.12 (0.005) or less | ||
| Left-turn steering | mm (in) | Horizontal direction: 0.15 (0.006) or less Vertical direction: 0.3 (0.012) or less |
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| Input shaft play | In radial direction | mm (in) | 0.26 (0.01) or less | ||
| In axial direction | mm (in) | Without play | |||
| Rotational resistance | N (kgf, lbf) | Maximum allowable value: 13.7 (1.40, 3.08) or less Difference between right and left sliding resistance: 24% |
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| Oil pump (Power steering system) | Pulley shaft | Radial play | mm (in) | 0.2 (0.008) or less | |
| Axial play | mm (in) | 0.9 (0.035) or less | |||
| Pulley | Ditch deflection | mm (in) | 1.0 (0.039) or less | ||
| Rotational resistance | N (kgf, lbf) | 9.22 (0.94, 2.07) or less | |||
| Regular pressure (Unloaded) | kPa (kgf/cm2 , psi) | 981 (10, 142) or less | |||
| Steering wheel effort (Power steering system) | At standstill with engine idling on paved road | N (kgf, lbf) | 34 (3.5, 7.6) or less | ||
| At standstill with engine stalled on paved road | N (kgf, lbf) | 294.2 (30, 66.1) or less | |||
| Recommended power steering fluid |
| SUBARU ATF or DEXRON III |