danglerb

Saw this on ebay, not that I would pay $8 for a magnet, but what do you all think about sticking a magnet on the outside of the oil filter?

linderpat

Why?

Dennis Wilson

For the same reason Porsche puts a magnet in the drain plug. But, considering that there is so little steel in our engines and gravity and filtration tends to hold any remaining steel shavings that may reach the filter, the $8 for an additional magnet sounds like a waste.

Dennis

jcorenman

The filter cans are steel, which I think would effectively "shield" most of the magnetic force from the inside of the filter.

The purpose, I assume, is to trap any iron (the cam lobes being the principal suspect). The factory provides a magnet in the drain plug, directly exposed to the oil and which should be quite effective at trapping any iron. I think the purpose is to be a"tell-tale" rather than try to trap all of the metal.

Porsche used very large magnets in the 356 and 912 sump (along with a bypass filter!), it was very effective at collecting my camshaft lobes a few decades ago.

Does anyone have experience with anything showing up on the 928's engine drain-plug magnet?

Cheers, Jim

Imo000

If you have steel particles that can get throught the filter, you have bigger problems than a lousy magnet. It's a vaste of time. The drain plug magnet was a good idea by Porsche, but to slap a rubberized magnet of the oil filter is a total waste of money.

ew928

But don't magnetically polarized oil lubricate better like Slick-50 lubrication products.




Maybe it's an aluminum magnet.

BBX

Magnetically polarized oil? are you serious, i've never heard of this...

danglerb

Same thing as the magnetic fuel polarizers that go on the gas lines.
http://www.fuel-polarizer.com/details.html

BTW nothing "shields" magnetic fields, but metal can shape the field like glass does in a lens. Put a modern strong magnet on the outside of a steel oil filter and it will be plenty strong of a field on the inside attracting stuff to the steel wall, but sounds like a non issue for us.

Which way is the flow through the filter, inside to out, outside to in?


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http://www.ftc.gov/bcp/edu/pubs/cons...tos/aut10.shtm

Alan

There is a reason for that...

ew928

Isn't oil fed from the threaded tube into the center of the filter and returned through the outer holes to the engine.

mark kibort

if you use a magnet with amsoil, you will neutralize its lubriction properties, turning it into cooking oil.

a magnet? if you got magnet stuff in your oil, you got problems.!

danglerb

The trick is to use an aluminum magnet.

Jim M.

Oh I don't know, they could trap and capture broken cam teeth.

Hilton

Ah yes, but if you re-orient the magnet's north and south poles, you'll find that cooking oil is just as effective as amsoil!

Or was it the other way round?

dr bob

No. Oil flows outside to inside in the filter. There's a rubber lip inside the cannister at the top that acts as a kind of check valve, easy to see when you look at your filters pre-installation. It keeps oil from being drained or drawn back through the pump and siphoning into the sump again.