And what about magnets on an oil filter

[crbr]

Magnet in the filter of the Allison Transmission. It collects what the filter doesn't. I always make sure I have the magnet with every change.

Each to their own.

 

[mrutkaus]

I've been using disk drive magnets on auto oil filters for a long time also, now using strong 1"x1" N48 neodybnium magnets from ebay on cars and tractor.

Who knows if they work? Can't hurt and the thought of all those micron ferous particles clinging inside the filter until it is removed is satisfying.

Mike

 

[SkyPup]

All my OEM Kubota hydraulic filters have large round magnets around them and indeed they do pick up allot of ferrous material.

 

[KICK]

The manufacturer's recommended filter will catch anything worth catching.

I tend to believe that.

old days the stuff didn't have filters, didn't last as long as nowadays either but the oil was crap too.

filtering makes sense, but some people tend to go overboard when it comes to oil and filters.

its like there is a whole Internet thing against Fram, if you were to look at BITOG , yet I've used them for years with good results.

so who do you believe??.

I generally believe what I have seen over the years, and not what people want to sell, but everyone is entitled to form their own opinion.

automatic transmissions do have magnets in them, generally in the oil pan. what is the purpose? simple, to collect the ferrous particles before they get a chance to plug the filter. but they still use a filter, just helps extend the life of that particular device as it extends the life of the transmission.

 

[KICK]

Magnet in the filter of the Allison Transmission. It collects what the filter doesn't. I always make sure I have the magnet with every change.

Each to their own.

differentials have magnetic drain plugs too.

no filter on that device but it does pickup quite a bit of metallic fuzz over time.

 

[Nightrain1]

What happens when you get more metal around the magnet then it can hold? I was suprised from my drag racing days, just how much metal these magnets attracted. They would build a mound of metal pretty quick. I was afraid eventually it would let a part of the collected metal all go at once. I was a big fan of magnets on the oil pan till a guru told me the launch would sometimes break clumps away to circulate through the motor all at once.
Then again, we are not launching our tractors out of the barn at 5000 rpm-hopefully.

 

[KICK]

There usually is a .002" clearance on parts like bearing's. However, under load these clearances can shrink quite a bit. The crank bearing is a good example of that. Under full load the clearance can shrink well under .001". There are other parts like lifters, rockers, gears, chains... that have no clearance at all save a hydrodynamic layer of oil.

shoot DP, everything in the engine that is lubricated rides on a hydrodynamic film of oil. that film is the only thing keeping those parts from burning up.

they put some of them special additives like zinc in there just in case that film goes away for afraction of a second but that film is always there if the engine is running. more wear occurs during starting than any other time. seems one of the reasons heavy duty vehicle engines last for so long is they are running all the time, so it isn't really the amount of time the engine runs that causes wear so much as how many starts it endures, especially the cold starts. but that is a different topic and unless you wanted to install one of those oil priming systems on an engine, that factor is always there.

but that film of oil is not a static thing, it is continuously being replaced under pressure or splash lubrication.

and those same low micron particles get washed away unless they somehow get lodged in a part. and those same small particles may get caught in the filter on one of their many trips thru the lube system.

whole scenario is a non argument unless you are looking for perfection.

 

[KICK]

What happens when you get more metal around the magnet then it can hold? I was suprised from my drag racing days, just how much metal these magnets attracted. They would build a mound of metal pretty quick. I was afraid eventually it would let a part of the collected metal all go at once. I was a big fan of magnets on the oil pan till a guru told me the launch would sometimes break clumps away to circulate through the motor all at once.
.

Hey Nighttrain, didya ever try to clean the metallic crud off those magnets. once its there it isn't going anywhere.

 

[cp1969]

What about all the non-ferrous metallic particles?? Do they not cause wear?

My opinion is WGARA, but for those who fret enough to put magnets on their oil filters, what about the non-ferrous metallic particles?

 

[KICK]

they need to find some no ferrous metal magnets