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.
2005 Lexus GS 430FACTORY OEM SERVICE PROCEDURE
Service Data
SS-57## STEERING SYSTEM SERVICE DATA CHART
| POWER STEERING FLUID | Β | |
| Fluid level rise | Maximum | 5 mm (0.20 in.) |
| Fluid pressure at idle speed with valve closed | Minimum | 8, 336 kPa (85 kgf/cm2 , 1, 209 psi) |
| STEERING WHEEL | Β | |
| Steering wheel freeplay | Maximum | 30 mm (1.18 in.) |
| Steering effort at idle speed | (Reference) | 7 N.m (70 kgf.cm, 61 in..lbf) |
| PS VANE PUMP | Β | |
| 2JZ-GE Engine: | Β | |
| Vane pump rotating torque | Maximum | 0.25 N.m (2.5 kgf.cm, 2.2 in..lbf) |
| Oil clearance between pump shaft and bushing | STD | 0.03 - 0.05 mm (0.0012 - 0.0020 in.) |
| Oil clearance between pump shaft and bushing | Maximum | 0.07 mm (0.0028 in.) |
| Vane plate height | Minimum | 8.6 mm (0.339 in.) |
| Vane plate thickness | Minimum | 1.397 mm (0.0550 in.) |
| Vane plate length | Minimum | 14.991 mm (0.5902 in.) |
| Clearance between the rotor groove and plate | Maximum | 0.033 mm (0.0013 in.) |
| Vane plate length | Pump rotor and cam ring mark | Β |
| NONE | 14.999 - 15.001 mm (0.59051 - 0.59059 in.) | |
| 1 | 14.997 - 14.999 mm (0.59043 - 0.59051 in.) | |
| 2 | 14.995 - 14.997 mm (0.59035 - 0.59043 in.) | |
| 3 | 14.993 - 14.995 mm (0.59027 - 0.59035 in.) | |
| 4 | 14.991 - 14.993 mm (0.59020 - 0.59027 in.) | |
| Spring free length | Minimum | 33.2 mm (1.307 in.) |
| 3UZ-FE Engine: | Β | |
| Vane pump rotating torque | Maximum | 0.25 N.m (2.5 kgf.cm, 2.2 in..lbf) |
| Oil clearance between pump shaft and bushing | STD | 0.03 - 0.045 mm (0.0012 - 0.0028 in.) |
| Oil clearance between pump shaft and bushing | Maximum | 0.07 mm (0.0028 in.) |
| Vane plate height | Minimum | 8.1 mm (0.318 in.) |
| Vane plate thickness | Minimum | 1.797 mm (0.0707 in.) |
| Vane plate length | Minimum | 14.988 mm (0.5901 in.) |
| Clearance between the rotor groove and plate | Maximum | 0.028 mm (0.0011 in.) |
| Vane plate length | Pump rotor and cam ring mark | Β |
| NONE | 14.996 - 14.998 mm (0.59039 - 0.59047 in.) | |
| 1 | 14.994 - 14.996 mm (0.59032 - 0.59039 in.) | |
| 2 | 14.992 - 14.994 mm (0.59024 - 0.59032 in.) | |
| 3 | 14.990 - 14.992 mm (0.59016 - 0.59024 in.) | |
| 4 | 14.988 - 14.990 mm (0.59008 - 0.59016 in.) | |
| Spring free length | Minimum | 36.0 mm (1.42 in.) |
| POWER STEERING GEAR | Β | |
| Steering rack runout | Maximum | 0.03 mm (0.0118 in.) |
| Total preload (Control valve rotating torque) | 0.5 - 1.7 N.m (4.7 - 17.2 kgf.cm, 4.1 - 14.9 in..lbf) | |
| PROGRESSIVE POWER STEERING (PPS) | Β | |
| PPS solenoid valve resistance | 6 - 11 Ξ© | |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.