not really a BM question , but there are lot of smart people here so Ill ask. I have a 66 valient , the motor is a slant 6 and the water lines in the block are rusty. I had it flushed by a pro with a machine and he said it was bad. It runs hot unless the weather is cool then its ok , my question is , is there a ggod way to disslove the rust. Was thinking of vinegar , but dont know what it will do when heated.
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