Magents for engine drain plug, transmission pan and differential drain plug?

[merc lover]

I've seen various vendors offering magnetic drain plugs for the oil pan, differential and transmission pan. The claim is they keep metal debris from circulating. It seems like a good idea but what say you?

[martureo]

I'd say sure. I don't think they will hurt anything, but hopefully your engine and trans aren't shredding themselves to begin with.

On our Honda Odyssey this is a different story. The trans is undersized, doesn't have a cooler and I regularly clean the magnetic drain plug of clutch material.

[carock]

It is definitely a good idea for the differential since it has no protection whatsoever. THe engine and transmission have filters. However I put magnets on everything recently, I'll have to report on how it works out after a few months of observation.

[vwnate1]

SWARF is always present in any machinery so the addition of magnets anywhere in the lubricants is wise .

Many older machines & vehicles came with sump oi magnets before WWII .

For ****s & giggles I began adding them to the fill plugs too and was surprised to see finer SWARF collect on the fill plugs and larger, more jagged SWARF collecting on the drain plugs .

Harbor Freight sells nifty little tubes of rare earth magnets that are disc shaped, they're dead simple to add to the nose of any drain plug .

Just remember to occasionally CHANGE THE OIL and clean the magnet .

[sgnimj96]

I think the only drawback could be if the magnet being used can't handle the heat and becomes weak or even demagnetized.
https://www.first4magnets.com/tech-centre-i61/information-and-articles-i70/neodymium-magnet-information-i82/how-does-temperature-affect-neodymium-magnets-i91

[vwnate1]

That has never, ever occurred .

I run magnets in air cooled engines that exceed 250* F oil heat and never had one yet .

Don't look for things to be afraid of .