Will a coolant flush unclog a heater core?
Will a coolant flush unclog a heater core? Hot coolant that has passed through other parts of the engine is run through the heater core as air is forced past it and into the cabin of the vehicle to heat it. Flushing the heater core can remove these clogs, but if it fails to work, you may need to have your heater core replaced. Can you use vinegar to flush a heater core? Vinegar is an acid, but is mild acetic acid and typically 5% such. It's perfectly okay to use it alone to remove system rust if you just...