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Old 04-12-2015, 06:38 PM   #1
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Engine zinc lube

Doing routine check of engine zincs, and out of recommended CAT thread lube. Suggestions on quality alternative that is perhaps cheaper and readily available ? Thanks.
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Old 04-12-2015, 06:41 PM   #2
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The CAT lube I believe is made by Loctite by I'm not sure which one.
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Old 04-12-2015, 06:50 PM   #3
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Greetings,
Whatever lube you use it must be electrically conductive. Do NOT use Teflon tape. It will insulate (electrically) the zinc from the metals it is meant to protect.
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Old 04-12-2015, 07:13 PM   #4
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Quote:
Originally Posted by sea hag View Post
Doing routine check of engine zincs, and out of recommended CAT thread lube. Suggestions on quality alternative that is perhaps cheaper and readily available ? Thanks.
I've always been a big fan of Never-Seez

The Regular Grade Anti Seize is the old stand-by
"The "original" anti-seize compound and extreme pressure lubricant formulated with copper, graphite, aluminum and other ingredients to protect metal parts against rust, corrosion and seizure up to 1800║F. "

They now have Mariners Choice Anti-Seize "Never-Seez« Mariner's Choice is a heavy duty anti-seize and extreme pressure lubricant formulated to assure absolute parts protection against seizure, galling and corrosion in fresh and salt water environments. Contains 7-13% Copper & 1-5% Alum Powder"

as well as other for SS & other specific applications... any of these should do the job - I keep a tube in each of my tools boxes.
Available at most marine & auto parts stores.
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Old 04-12-2015, 08:01 PM   #5
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Use whatever you like including Teflon tape. After your done, take a multi meter and check for conductivity between the zinc holder and what it's screwed into. I always check conductivity when installing any zinc. I use rtv silicone when installing zincs.

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Old 04-12-2015, 09:07 PM   #6
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Cummins told me to use rectorseal no. 5. I've been using NO-OX ID which is an electrically conductive grease. I'm leaning towards staying with the NO-OX ID.
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Old 04-12-2015, 11:09 PM   #7
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You shouldn't really need to use anything on the threads if you're checking your zinc a couple of times a year. It's highly unlikely they would seize up in that short a time.

But almost any lube will work, including Teflon tape (which I really don't recommend). Just use whatever you use sparingly and only put it on the last few threads.
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Old 04-13-2015, 07:40 AM   #8
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I use Teflon paste for items that need to be conductive such as zincs and senders.
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