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
Engine Cooling: Service: Specifications
COOLING SYSTEM SPECIFICATIONS
| Application | Specification | |||||
|---|---|---|---|---|---|---|
| Coolant Replacement Interval | 30,000 Miles Or 24 Months | |||||
| Coolant Capacity (1) | 10.4 Qts. (9.8L) | |||||
| Radiator Cap | ||||||
| Standard Pressure | 13.5-17.8 psi (.95-1.25 kg/cm2 ) | |||||
| Minimum Pressure | 11.4 psi (.8 kg/cm2 ) | |||||
| Thermostat Opening Temperature (2) | 176-183°F (80-84°C) | |||||
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THERMOSTAT R & I
For removal and installation, see THERMOSTAT .
WATER PUMP R & I
For removal and installation, see WATER PUMP .
Factory Service Tools
Use the Manual With the Right Hardware
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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.