Re: Best rust solution?
bobH is probably correct, though there is also the possibility that they got the block REALLYDAMNCLEAN and it went to hell in a big hurry running without the antifreeze!
"chemical cleaning process (which some of us are a little afraid of)" YES! In this case, chemical cleaning is the only hope without tearing a running car apart, and the Evaporust is the only chemical I know of that is really effective at rust eating and not capable of eating iron and/or whatever it encounters in the radiator. If this is to work, it will need a lot of chemical in there for a substantial amount of time, and most alternatives are acid or caustic and will eventually eat anything they can find, like the fox sent to get rid of the mice in the chicken coop...
Evapo will be safe.
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