Q: How to check and replace a fan clutch and Radiator fan in Chevrolet Astro?
A: All V6 and some four-cylinder engines are equipped with thermostatically controlled radiator fan clutches. To check the radiator fan clutch, start the engine when it is lukewarm and let it run for two minutes. For safety purposes, remove the key from the ignition switch. Turn the fan blades and note the resistance, which should be moderate depending on the temperature. Drive the vehicle until the engine is warmed up, then shut it off and remove the key.