2003 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Engine Cooling: Service: Specifications

COOLING SYSTEM SPECIFICATIONS

Application Specification
Coolant Replacement Interval 30,000 Miles Or 24 Months
Coolant Capacity 10.46 Qts. (9.9L)
Pressure Cap Standard Opening Pressure (2) 13.5-17.8 psi (.95-1.25 kg/cm2 )
Thermostat Opening Temperature (3) 176-183Β°F (80-84Β°C)
(1) The Toyota Super Long Life Coolant (SLLC) has been adopted.
(2) Minimum opening pressure is 11.4 psi (.8 kg/cm2 ).
(3) Thermostat valve lift should be .39 in. (10 mm) or more at 203Β°F (95Β°C).

THERMOSTAT R & IΒ 

For removal and installation, see THERMOSTAT .

WATER PUMP R & IΒ 

For removal and installation, see WATER PUMP .

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.

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