Replacing Zincs on Marine Engine Heat Exchanger and Oil Coolers

This video will show you how to replace the sacrificial zincs in heat exchangers and oil coolers in your marine engine which will result in a longer lasting, more reliable engine in your boat.

[@lawrencefennimore500]

Thanks for the clear step by step videos they are very helpful for first time owner of twin 2715e ford engine craft please keep your educational tutorials coming, some of us absolute beginners are very grateful for your efforts 👍

[@davidvonwolffersdorff2385]

Thanks Lawrence!

[@marineman2298]

Thanks for taking the time to cover one of the simpler tasks. I thought that using teflon tape was sort of a no no? Vaguely remember something about it insulating the zinc causing it to not due what you put it in there to do? Also, bits of the tape getting into the system were not good? Maybe I reamed both of those things....!

[@davidvonwolffersdorff2385]

Sorry for the tardy reply to your comment! The key is to only use one wrap of teflon tape. That way there will be a metal to metal bond. And...that is why I check for continuity with the multimeter after installing the zinc.

[@ponkapoag1]

Shouldn't use teflon tape. It acts as an electrical insulator. Zincs depend upon solid electrical bond in order to protect heat exchanger.

[@davidvonwolffersdorff2385]

I'm assuming that you are saying this because you are assuming that the teflon tape will prevent continuity between the zinc and the threads of the heat exchanger. This is why I suggest only using one wrap of tape, and, after installation, using your multimeter to check for continuity. Using only one wrap assures that the tape will tear enough to create continuity between the zinc and the threads of the heat exchanger. If you do use tape as I suggest, you must check for continuity after installing.

[@marchingontogether2571]

put a multimeter across and you will find that you are wrong about that

[@makesumwake]

@@marchingontogether2571 it appears in the video that he did use a multimeter and got continuity

[@ryanhorlyck]

Is that a 4cyl ford Lehman ? Or 6 cyl

[@davidvonwolffersdorff2385]

Six cylinder.

[@reiseguru2898]

Taping is not a good idea.Never do it !!!!!

[@davidvonwolffersdorff2385]

Teflon tape is fine as long as you only use one wrap and you check with your multimeter after installing and make sure that there is continuity. Using only one wrap assures that the tape won't prevent continuity. Checking with the multimeter will alert you, if there's no continuity, that you used too much tape.