I took the cover off inside the lower air filter canister and added a bead of RTV, re installed it and bent the four tabs so it was held tightly in place and discovered far less oil ist inside the dry & clean part of my stock air cleaner assembly .

I don't generally believe I can re engineer things better than someone who does it for a living but this simple thing did help as the dry paper elements no longer get wetted with oil mist .

Washable air cleaners don't filter out the finer wear particles and always cause shorter engine life .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Sealing the separator is in one of the old threads.

Please substantiate your claim on this concerning all washable air filters. The one I have is made By Fram and is not a foam or oil impregnated filter like the K&N. Amsoil also made a filter similar to the Farm Washable one.

It is common to wash the Air Filters on big rigs and other types of engine powered equipment. They actually sell special washers and even dryers for that. Of course they target businesses that own fleets.

__________________
84 300D, 82 Volvo 244Gl Diesel

THANX Bill ! .

That even looks a little bit cleaner too .

I see you're running a KKK turbocharger, can you make any comments about that ? maybe in a different thread .

As far as washable filter efficiency , it's common knowledge, go look it up ~ I don't waste time in baseless arguments .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

In order for that to be true they would all have to be the same and it is obvious different brands are made of different materials. That alone is sufficient to cast doubt on what you have said.

__________________
84 300D, 82 Volvo 244Gl Diesel

You're comparing an industrial application to a consumer application? You aren't comparing apples to apples.

The air filters you're referring to aren't "washable" but they clean them by reversing the flow of the air in a spinning cleaner. These filters are also expensive compared to ours and have a much longer serviceable life.

I agree that the premise that all washable consumer air filters offer less filtration for smaller particles.

__________________
Onus probandi incumbit ei qui dicit, non ei qui negat

I recondition w123/w126/w124/w140/r107/r129/ steering boxes!


1984 300D "Elsa" odo reset 6/2011 147k
1983 300TD "Mitzi" ~268k OM603 powered
1995 E300 "Adelheid" 262k [Sold]

ALL washable filters have lower media surface area and larger pores. Thats how they have higher airflow than standard paper filters.


Is simple physics; you can't increase flow while having less surface area without reducing restriction, hence larger pores and larger matter can pass through.





No, its not, especially in modern engines. Donaldson Powercore filters are becoming the most common filter media. They have higher airflow and filter better than conventional paper media AND occupy smaller volume of space. How? Drastically increasing filtering surface area by being formed in a honeycomb channels rather than a flat surface.
https://www.donaldson.com/en-be/engine/filters/products/air-intake/replacement-filters/powercore-filters/