Does flushing heater core work?
Does flushing heater core work? RAY: You also can start by adding a chemical flush to the entire cooling system and, after letting the engine run and the coolant circulate for a while, you can drain that out and then reverse-flush the heater core with clear water. Flushing a plugged heater core works in only about 40 percent of cases. Can a clogged heater core overheat your car? Driving with a faulty heater core can be risky, as it can lead to overheating and extensive engine damage. Even a clogged heater core can prevent proper coolant circulation, causing your engine...