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.
2004 Lexus SC 430FACTORY OEM SERVICE PROCEDURE
Service Data
Service Data Specification
| POWER STEERING FLUID | ||
| Fluid level rise | Maximum | 5.0 mm (0.20 in.) |
| Fluid pressure at idle speed with valve closed | Minimum | 8,336 kPa (85 kgf/cm2 , 1,209 psi) |
| STEERING WHEEL | ||
| Steering effort at idle speed | Maximum | 7.0 N.m (70 kgf.cm, 61 in..lbf) |
| VANE PUMP ASSY | ||
| Vane pump rotating torque | Maximum | 0.25 N.m (2.5 kgf.cm, 2.2 in..lbf) or less |
| Oil clearance between pump shaft and bushing | STD | 0.03 - 0.045 mm (0.0012 - 0.0018 in.) |
| Maximum | 0.07 mm (0.028 in.) | |
| Vane pump height | Minimum | 8.1 mm (0.318 in.) |
| Vane pump thickness | Minimum | 1.797 mm (0.0707 in.) |
| Vane pump length | Minimum | 14.988 mm (0.5901 in.) |
| Clearance between the rotor groove and and plate | Maximum | 0.028 mm (0.0011 in.) |
| Flow control valve compression spring free length | Minimum | 36.9 mm (1.45 in.) |
| RACK & PINION POWER STEERING GEAR ASSY | ||
| Tie rod assy turning torque | 0.49 - 3.43 N.m (5.0 - 35 kgf.cm, 4.34 - 30.38 in..lbf) | |
| Power steering rack runout | Maximum | 0.03 mm (0.0118 in.) |
| Total preload (turning) | 0.5 - 1.7 N.m (4.7 - 17.2 kgf.cm, 4.1 - 14.9 in..lbf) | |
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.
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