Engine Coolant Thermostat Housing Assembly Replacement for 11537644811,

If the thermostat is good, the temperature of the upper and lower water pipes is different, and the upper water pipe is hot and the lower water pipe is cool. (1) Thermostat does not open, the water temperature gauge shows high temperature area, the engine temperature is high, but the coolant temperature in the tank is not high, touch the radiator does not feel hot.