Thread: Which Air Cleaner for a 2.25 petrol

I can't remember, did you ever get to actually run tests on the oil bath filter?

John

Thank you very much for the offer, I will send you a PM

Sent from my E2053 using AULRO mobile app

Originally Posted by isuzurover

In terms of what is the best filter, the order of preference should be:

1. Modern off-highway filter assembly (dual stage filter with cyclone).
2. Modern barrel filter assembly with integral cyclone - e.g. 200tdi and 300Tdi defender
3. Modern flat panel filter e.g. Disco 300Tdi
4. Original Oil bath
...
5. A vacuum cleaner bag
6. A stocking
7. A pink batt
8. A chunk of foam mattress
9. Anything that remotely resembles a filter
...
10. K&N

Just some added info and not overly relevant to the OP...
Any mechanic/service tech/owner operator that has worked out in the field in any heavy or industrial equipment industry would look at the above list and say its spot on.

Get into extreme dust environments such as any ground engaging equipment (loaders, excavators, bobcats etc etc) and the difference between the top two filter setups compared to anything less on the list and it becomes very obvious.

I've had a flat panel filter become so blocked so quickly that the vehicle (hilux diesel) went into limp mode and basically stopped.

The oil bath filter rates remarkably high and would certainly be my pref on the old series Landies

Regards
Daz

Cmon guys, lets go easy on K&N,

When its all said and done they do make a nice bird cage

Originally Posted by JDNSW

I can't remember, did you ever get to actually run tests on the oil bath filter?

John

Thanks Homestar that's a great offer, will drop you a PM! much appreciated!!

Hi everyone

Thank you very much for the advice to use newbies on the air-filter, really appreciated.

All the best, Richard

My personal experience with factory paper vs K&N on a flat-panel Disco 1 V8. Paper seemed to keep the downstream ducting clean and clear and I never had an issue. After a 6000km round trip from central Vic up to Oodnadatta, then to Old Andado, across the Simpson and back along the Birdsville track I can tell you that the ducting and MAF was well covered in a fine layer of talc-fine dust. The leading edges of any convolutions, etc had a heavier build-up. The filter stopped the bigger bits very well (it was reasonably filthy), but I suspect the small-particle filtration is not up to snuff - however I haven't seen any independent test results to confirm that. Note that the filter was run as-received from K&N (pre-oiled).

The K&N is now cleaned, oiled... and wrapped in a plastic bag back in it's original box on the shelf. A paper filter is back in the airbox, and will remain.

The K&Ns have a potential advantage in that if they get a gob-full of water they tend to hold up well structurally, block the airflow, and stall the engine, rather than collapsing completely and allowing a 'very bad result'. I saw this first hand many years ago on a mate's Jeep. However placing some sort of reinforcement steel mesh over the paper panel could/should achieve a similar effect.