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Thermostat - Inspection

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

Install a new gasket and the water inlet with thermostat with the 3 nuts.

Remove the 11 clips and intake duct seal.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE COOLING

Visually check the drain hole for coolant leakage.

If leakage is found, replace the water pump assembly.

Install a new water pump gasket and the water pump assembly with the 16 bolts.

Remove the 11 clips and intake duct seal.

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE COOLING

Remove the 11 clips and intake duct seal.

Fill the radiator with coolant and attach a radiator cap tester.

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