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CLR and heater cores
Posted to Open Discussion Forum on 2/21/2023 51 Replies

Hello everyone. Ok there has been some debate about using CLR to clear heater cores. I took an old, plugged heater core, cut it in two pieces. I then cut the plate on the bottom of the heater core off. I put it in a container and put some CLR into the containe... Login to read more.

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