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i have been worried about hard water in rads for a long time so this was the pre mixed stuff. so if that was the problem it was from the prestone factory.

when we found the problem dodgefarmer here repaired and surfaced them, they went on a new 383 and this time i bought distilled water and non mixed antifreeze and went 50/50 mix. no tap water anywhere.

hopefully problem is solved? i ran straight tap water in my blower motor with eddies and never had this issue.

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You have aluminum heads on a iron block, flowing liquid through a copper/brass radiator with a cooling system with metal parts is gonna need special attention to prevent damage. Fully flushed block, clean out radiator, ionized and mineral free water, correct anti freeze mixture and proper grounds will go a long way to keeping your engine running good and problems down.

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I just added mine in the top of the rad. Originally I was going to put it in place of the drain, but the tank wasn't wide enough. Now I still can use the drain, and I don't have to empty it to check or replace the anode.
Jim

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Are those your heads or are you just saving the pictures so you can be part of the hater band wagon

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