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International Automotive Technicians Network
Re: CLR and heater cores
Posted to Open Discussion Forum on 2/23/2023

Nah, more than 50% of the time we encounter lime and calcium carbonate deposits. What gets flushed out with the HECAT are hardened lumps of that white stuff. I never paid much attention to what came out until I sterted attaching a long heater hose to the outle... Login to read more.