Cooling System Specifications: Diagnosis Lexus GS II

Inspection

1. Check engine coolant level at reservoir. The engine coolant level should be between the LOW and FULL lines, when the engine is cold. If low, check for leaks and add engine coolant up to the FULL line.
2. Check engine quality. There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole, and the coolant should be free from oil. If excessively dirty, replace the coolant.

1. Check engine coolant level and radiator reservoir. The engine coolant level should be between the LOW and FULL lines at normal temperature 68°F (20°C). If low, check for leaks and add engine coolant up to the FULL line.
2. Remove radiator cap. There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole, and the coolant should be free from oil. If excessively dirty, clean the coolant passages and replace the coolant. Reinstall the radiator cap.