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Old 04-20-2015, 05:08 PM   #1
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K&N Filter

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Any questions?

There's a reason most manufacturers and mechanics hate them.

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Old 04-20-2015, 06:36 PM   #2
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Might as well be running a window screen. Paper is best.

Perry
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Old 04-20-2015, 06:40 PM   #3
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I'm not taking a side but IF I was counseling a newbie on looking at a diesel p/u that had some form of oiled air filter element, or really any filter here's my simple suggestion and them my more serious suggestion.

1. Remove some piece of post filter air tube or hose between the air filter and turbo. Take a pristine white rag and wipe the inside of the tube.White rag perfectly, spotlessly, flawlessly clean? Good sign. Any dirt film? Run, don't walk.

2. Engine oil analysis will detail and test for contaminants.
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Old 04-20-2015, 07:10 PM   #4
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K&N Filter

None of that was a surprise. Knew what I was getting into. Just thought it was a good example of to look out for. Amazing how much that impeller looks like the inlet of a 50 year old Kirby.
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Old 04-20-2015, 09:16 PM   #5
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Where was it mounted to get that much dirt inside it. What make it the new one I haven't see that kind before
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Old 04-20-2015, 09:29 PM   #6
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Nope, won't use them...
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Old 04-20-2015, 09:42 PM   #7
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K&N Filter

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Where was it mounted to get that much dirt inside it. What make it the new one I haven't see that kind before

That's a Freightliner M2 filter by Donaldson. They pop up on eBay for $100 new quite often. It's a new axial flow design. It's designed for 600 hp so the little 5.9 should breath well. I posted on the install on my 95 some time ago. Very nice design. Nearly impossible to get dirt in the canister during element change and it has a secondary protection filter. Cartridges run about $50.

http://www.ebay.com/itm/like/2714347...3D817625282686
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Old 04-21-2015, 08:40 AM   #8
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I've had one on the MG for the last -- ah, well, this is almost embarrassing, but it's going on 30 years now. It still works ok. I just keep on cleaning it up and reinstalling it.

Is it superior to anything else, including paper filters? I doubt it. But it appeals to my inner need to reuse reuse reuse.


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Old 04-24-2015, 08:36 PM   #9
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I like your mod, and will look at updating mine to the same.
I have been using K&N on my vehicles for years...have them on my Merc e55 wagon at the moment...first thing I did when I got it.
I don't think the filter you had on there was designed for that application...too small and exposed.
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Old 04-25-2015, 09:56 AM   #10
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Dirt is a very bad thing in an engine. It is like running sand paper through it. It will wear out rings and cylinders and probably does not help the valves either. I have seen that happens to the insides of engines run without good air filtration.

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Old 04-25-2015, 12:41 PM   #11
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K&N Filter

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I like your mod, and will look at updating mine to the same.
I have been using K&N on my vehicles for years...have them on my Merc e55 wagon at the moment...first thing I did when I got it.
I don't think the filter you had on there was designed for that application...too small and exposed.


Lots of guy swear by them but I see too many cases like this. Especially where they are used in challenging environments. There is a reason they flow more air. I think the PowerCore is a much better solution.

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Old 04-25-2015, 01:46 PM   #12
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K&N should be outlawed for false advertising (calling their screens "filters".)
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Old 04-26-2015, 11:32 AM   #13
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Know what's funny? Avery car, truck, motor etc. forum you can find has a thread on K&N just like this. Some people love them, some hate them...can we please leave it at that and get on with our lives?
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Old 04-26-2015, 11:34 AM   #14
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Kota, could you please post a link to your install information? I could not find it using search...
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