Finally replaced (I should say “installed” because nothing was left of the old one) the zinc in the heat exchanger. I’m ashamed that it took us this long, since we may have contributed to the disintegration of our heat exchanger, but all I can say is that we’ve been heavily occupied with other things.
There is a zinc in the seawater side of our heat exchanger (on the side).
There is a drain plug in the coolant side of our heat exchanger (on top).
There was a drain plug in the bottom of our oil cooler; I replaced it with a threaded plug that holds a zinc.
There is a drain plug in the transmission oil cooler. I would like to replace this with a threaded plug that will accept a zinc.
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