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International Automotive Technicians Network
Re: CLR and heater cores
Posted to Open Discussion Forum on 2/21/2023

You mention a 300. My wife had a 300 and before she knew me a shop near Columbus put in a new water pump and heater core. He found big chunks of what looked like calcium in the heater core, the pump and the thermostat. He showed it to her. When we got together... Login to read more.