LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2003 >> RX 300 FWD >> Repair and Diagnosis >> General Information >> Specifications Index >> Common Specs & Procedures >> Engine Cooling >> Service >> Specifications
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Cooling: Service: Specifications

COOLING SYSTEM SPECIFICATIONS

Application Specification
Coolant Replacement Interval 30,000 Miles Or 24 Months
Coolant Capacity 9.5 Qts. (9L)
Pressure Cap Standard Opening Pressure (1) 13.4-17.6 psi (.95-1.25 kg/cm2 )
Thermostat Opening Temperature (2) 176-183°F (80-84°C)
(1) Minimum opening pressure is 11.2 psi (.78 kg/cm2 ).
(2) Thermostat valve lift should be .394 in. (10 mm) or more at 203°F (95°C).

THERMOSTAT R & I 

For removal and installation, see THERMOSTAT .

WATER PUMP R & I 

For removal and installation, see WATER PUMP .