![]() ![]() You should be able to see coolant circulating within the radiator.When the engine has reached operating temperature make sure the thermostat opens.Refill the system and run the engine or pressure test to check for leaks. If the thermostat is installed upside down, the engine will overheat. When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing.The temperature rating is stamped on the sensing bulb on the bottom of the thermostat.They are of different sizes, types, and temperature ratings. Compare the size of the thermostat to the old one.Some engines use a rubber O-ring to seal a thermostat housing. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine.Loosen the housing bolts and remove the housing.Remove the upper radiator hose connection from the thermostat housing.Drain some coolant into a clean container until the coolant level is below the thermostat housing.SOURCE: how do i replace thermostat in 2001 dodge dakota ![]()
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