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citric acid and the heater core.
Does anyone know how well flushing with citric acid cleans out the heater core? I was thinking of replacing mine as a preventative measure (still works), but didn't know if a citric acid would clean this sufficiently. I figure after 24 years, it's probably not super clean inside.
Also, how hard is it to replace? (other than having to shill out $300).
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