M35a2 air filter element: commercial part #?

[SandBar]

Thanks, I needed to order up an alternator belt and this helped. It is indeed the saame size between the two spreadsheets I found.

 

[country]

We have new production filters for $59



M35-371 | Air Filter for 2 1/2 Ton MultiFuel Truck
Air Filter for 2 1/2 Ton Multi-Fuel Trucks for M35A2, M36A2, M109, M109A3 2 1/2 Ton Trucks with Multi-Fuel Diesel Engine
NSN #: 2940-00-804-7898, 2940-00-886-1209
Part #: 10912373, 250D1
Price: $59.00

 

[3rdmdqm]

One thing you need to consider. The military filter can be washed and reused again and again. Commercial filters cannot.

This is good to know, I was not aware. What is the best method to wash this? Degreaser in water in a five gallon bucket? Thanks.

 

[V8srfun]

This is just a thought but knowing how these engines do not like intake restrictions (poor flowing aftermarket filters). I wonder if turned up trucks would benefit from a different filter setup that can flow more air and possibly decrease egt’s. We know that the dust bowl filters cause higher egt’s so can the reverse happen with more capacity.

 

[Ferroequinologist]

This is just a thought but knowing how these engines do not like intake restrictions (poor flowing aftermarket filters). I wonder if turned up trucks would benefit from a different filter setup that can flow more air and possibly decrease egt’s. We know that the dust bowl filters cause higher egt’s so can the reverse happen with more capacity.

This is exactly why I went with an m35a3 intake and filter on my m109 when I put an LDS in it. Stock m35 filter is 410cfm, m35a3 filter per the phone call with the manufacturer is 575cfm.

 

[ckid]

Glad I found this post because I'm not sure I have the right filter.

My old one has a hole in the filter element, so I ordered one . The part number matched on the website, but the one I got has no part number on the filter itself. It looks like what @country posted above. It's about 12 inches across. But my old is only about 10 inches across. Seems like a small difference, but over the entire filter that adds up, so I'm wondering if this thing flows an actual 410 CFM, or its like the commercial ones mentioned earlier in this thread flowing much less.

Thoughts? Did these filters change dimensions at some point but keep the same part number?

 

[Charlie175]

I ordered a replacement also, it was a lot smaller than the OEM one that I have. Seller says it flows the same but my EGT temps go up faster now.

 

[ldmack3]

Does cutting a second intake hole in the can help any with temps?

 

[Gypsyman]

Does cutting a second intake hole in the can help any with temps?

I added a Donaldson Air Ram snorkel to mine to achieve a bit of positive head pressure to the air filter canister when the truck is in motion.

 

[Gypsyman]

Interesting comparison. The larger used filter is an original Greenlee and the new filter is the current 410 CFM rated Donaldson.

The original Greenlee filter after being cleaned weighs 4.8 lbs while the Donaldson weighs 3.8 lbs.

Greenlee OD is 11-9/16" while the Donaldson is 10".

It's impossible to judge one filters rating against another without knowing at what restriction the rated flow was achieved. An interesting test would be running a truck at a given RPM and load with each brand of filter while measuring inlet restriction. I had an AFE 1400+ CFM rated cone filter on a Cummins 5.9L twin turbo truck and the filter would completely collapse as soon as I went WOT and the boost came up. EGT's and/or a restriction gauge tell you more than manufacturers ratings in most cases.

Comparison photos below...

 

[ToddJK]

This is one option to consider

 

[Charlie175]

The replacement one I got is the smaller dia and my temps go up quicker with it. Very frustrating.
I had looked for that conical filter but it is NLA unless you can find it. Something out there has to flow better with good filtration.
I've been looking for the fender mounted filter but haven't found one close by.
My 6.7 cummins has itty bitty filter compared to whats on the Deuce and it pushes 400 hp.

 

[V8srfun]

The replacement one I got is the smaller dia and my temps go up quicker with it. Very frustrating.
I had looked for that conical filter but it is NLA unless you can find it. Something out there has to flow better with good filtration.
I've been looking for the fender mounted filter but haven't found one close by.
My 6.7 cummins has itty bitty filter compared to whats on the Deuce and it pushes 400 hp.

That is because the turbo on the deuce it terribly inefficient and any intake restriction causes a increase in intake air temps and a rich condition in the combustion chamber.

 

[kenn]

I just went ahead and ordered an "identical" one from one of the online vendors here. It was the same height/diameter as the stock one I removed. It was either Mikes or Eriks. I can't remember which. It looked identical but strangely, didn't have a part number on it. My old one was clearly the original. Brown and rusty. I started to clean it but opted for new. Hopefully the new aftermarket ones have equivalent flow.

 

[Charlie175]

Still looking for better flow due to high EGT's. I have backed off my fuel flow but still get high temps. Might just go with aftermarket large can on the fender.

 

[Darylfraser]

Running the Napa filter in mine but I was not aware of the CFM difference until now. Thanks all.

 

[ToddJK]

There was a filter that Tactical Repair recommended, but I noticed it's discontinued now. As I would search for others like it, none of the manufacturers would give a cfm rating. For the time being I've been sticking with the stock filters, have two of them so I'll wash one and dry it out, rotate them when I do an oil change. So far that's been working, but still be nice to find a better filter that can fit with no modifications.

 

[Charlie175]

Yeah I had seen that and tried to find one but have failed so fair.

 

[ToddJK]

Yeah I had seen that and tried to find one but have failed so fair.

Trying to find the five ton air cleaners aren't easy either, and the few I did find, the shipping quotes were insane. The thought of buying a big rig filter housing like one from an international or mack seemed like a good idea, fabricating a bracket so it fits and bolts to the fender and then use a reducer to fit the air intake pipe. Looking online has been a bust, I need to find a semi junk yard or an old semi grave yard to look and pick from in that case. In some cases, maybe even a filter box off a tractor or industrial equipment, but all that seems expensive if found online.

 

[V8srfun]

I think the best option is to find something at the local big rig salvage yard. I think I am going to visit one in the near future if not for anything but the fun of it.