Lexus IS250 IS220d GSE20 ALE20 4GR-FSE COOLING

THERMOSTAT - INSPECTION

1. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
Thermostat - Inspection. 4GR-FSE COOLING. Lexus IS250 IS220d GSE20 ALE20

The valve opening temperature is marked on the water inlet sub-assembly.

Thermostat - Inspection. 4GR-FSE COOLING. Lexus IS250 IS220d GSE20 ALE20

Submerge the water inlet with thermostat sub-assembly, and then gradually heat the water.

Check the valve opening temperature.

  • Valve opening temperature:
  • 80 to 84°C (176 to 183°F)
  • HINT:
  • The valve opening temperature is stamped on the water inlet with thermostat.
Thermostat - Inspection. 4GR-FSE COOLING. Lexus IS250 IS220d GSE20 ALE20

Check the valve lift.

  • Valve lift:
  • 8.0 mm (0.315 in.) or more at 95°C (203°F)
  • HINT:
  • If the valve lift value is not as specified, replace the water inlet with thermostat sub-assembly.

When the temperature of the water inlet with thermostat sub-assembly drops below 77°C, check that the valve is fully closed.

  • HINT:
  • If the valve is not fully closed, replace the water inlet with thermostat sub-assembly.
LEXUS IS250, IS220d / GSE20 ALE20