Interesting. Thanks. So why is there a zinc in the heat exchanger? Is it electronically connected? Also, the fact that the zinc do disintegrate, are they not serving a purpose? Appreciate the education.I zinc protects metal that it is electrically in contact with. The only thing the zinc in the hose fitting protects it the hose fitting itself. Being electrically isolated from the engine, it wouldn't need one anyway. I suspect that fitting was originally installed for something else, not for a zinc.
Thanks, but just lipstick. I blew the exhaust mixing fitting and filled the engine room with soot so I cleaned it as best I could and sprayed it in place.I am impressed with how nice and clean and freshly painted your 4-108 looks. Did you remove and rebuild it?
The heat exchanger has multiple types of metal, connected to each other, with salt water making it a battery. So without a zinc, there can be corrosion in the heat exchanger, but there shouldn't be much. If the heat exchanger is bolted to the engine, then you absolutely need the zinc as that would electrically connect it.Interesting. Thanks. So why is there a zinc in the heat exchanger? Is it electronically connected? Also, the fact that the zinc do disintegrate, are they not serving a purpose? Appreciate the education.