I've got a very rusty 235 block cooling system and I would like to flush the rust out before installing the new thermostat, waterpump, and radiator. Is there a product out there that would knock most of the rust out or are there home remedies that would work just as well. Blocking off waterpump and thermostat housing should be easy enough with a couple of homemade gaskets. Any thoughts or experience with this would be helpful. Thanks, Gary
