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.
2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Service Data
WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
1GF-FE:
Service Data - Cooling (1GF-FE)
| Water inlet w/ thermostat | ||
| Valve opening temperature | 80 -- 84°C (176 -- 183°F) | |
| Valve lift | at 95°C (203°F) | 8 mm (0.31 in.) or more |
| Radiator cap | ||
| Relief valve opening pressure | Standard | 93 -- 123 kPa (0.95 -- 1.25 kgf/cm2 , 13.5 -- 17.8 psi) |
| Minimum | 78 kPa (0.8 kgf/cm2 , 11.4 psi) |
2UZ-FE:
Service Data - Cooling (2UZ-FE)
| Thermostat | ||
| Valve opening temperature | 80 -- 84°C (176 -- 183°F) | |
| Valve lift | at 95°C (203°F) | 10 mm (0.39 in.) or more |
| Radiator cap | ||
| Relief valve opening pressure | Standard | 93 -- 123 kPa (0.95 -- 1.25 kgf/cm2 , 13.5 -- 17.8 psi) |
| Minimum | 78 kPa (0.8 kgf/cm2 , 11.4 psi) |
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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