Try the Calci- Solve or whatever the other guy recommended, if that doesn't work try the CLR, if that doesn't work go to a farm supply and get some of the Acid dairy farmers use on their milk equipment to control milkstone deposits (it's a phosphoric acid), if that doesn't work look for 66 baume Hydrochloric Acid (may also be called Muratic acid) if you work at it long enough the Muratic will dissolve the mineral build up OR the heater core itself. By the time you get to the Muratic/Hydrochloric acid your are employing the Nuclear option on mineral build ups. But before I did all of this I'd make sure the valve that controls flow through the heater core is working and isn't plugged itself.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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