Engine/Transmission (1998.5 - 2002) K&N Air filter

[MMonday]

I have a K&N whats wrong with it or whats a better one it definitely boosted my HP

 

[SAndreasen]

I've ran afe filters before and had good luck also ran oil samples every change and never had high silicon levels

 

[AnOldBiker]

There's a lot being said about the oil filters, but the one thing that is critical is when the owners clean them and they over oil, or over oil before they are dried. In time, oil particles can be sucked down the intake tube and end up on your turbo blades. At they point of oil collecting enough to off balance the blades, you lost the turbo. I used the Banks oil filter for years and like mentioned by SAndreasen, never had a bad sample because I clean properly. (HAD an oiled filter until my daughter destroyed it, but that's another story and I'm still a bit upset over it).
If you stay with oil, be careful when cleaning and inspect your turbo blades once in a while to maintain balance. If oil is starting to collect on the blades, clean them and think about how your cleaning the filter.

You going to find out when changing between different filters, there isn't much HP or MPG increase, if any because of one filter is being way better than another.
What you want to get the best filtration as possible with the least amount of work and cost.
And as mentioned before, an oil sample will tell more than what your oil is doing.

Heck, I ended up with an S&B CAI with an aFe dry reusable filter. Oil tests are great and I'm happy.

 

[Jim W]

If you want to use a window screen for an air filter than use a K&N air filter, as the famous “Harvey Barlow” would recommend.


I posted this sometime ago on another request; “Should I keep it: K&N” and I am repeating my answer for you. I would also recommend doing a search function on K&N filters in TDR.

I know this is a marketing news letter from Cummins, which I get every month from them. But they do have science and testing backing up their data which Cummins has put out for us to review and understand why the Fleetguard air filter is the best option. See the below links that I have provided.


http://turbodiesel.cumminsnewsletter...ur-air-filter/

http://turbodiesel.cumminsnewsletter...n-your-engine/

You can use what you like but from an engineering and design perspective the Fleetguard air filter is the best option for our engines based on test data that is provided.

Jim W.

 

[BLNRAY]

I have used K&N filters for the better part of 394,000 mi,still have original turbo,use maybe 2 qt. oil between changes.Part of the issues with cleanable filters comes from over serviceing.I clean my filter when the filter minder says its time.i read post on here where filters are cleaned at 2-3000 ni intervals,over serviced and probaly over oiled,you know if some is good than more must be better,not always true.Donalson heavy duty filters use to come with an installation note that said install the filter reset the minder and dont bother the filter again until the filter minder says its time.

 

[klcammie]

Had a K&N when I bought truck. Frist oil changed checked and found oil on turbo blades and in the intake line to turbo. Did searches on here and other forums and went with the Donalson BHAF [big honking air filter]. No more oil since. Like BLNRAY says leave it alone until minder says change. BTW that's been two years and 25k minder hasn't moved.

 

[Houser]

My KnN would ice up and clog in very cold weather. I went back to
Pape

 

[Joseph Donnelly]

If you think it definitely boosted your HP, do you have dyno data, or do you just think it is stronger from the aded noise, etc? I did about a thousand dyno runs on my 1997 so not much surprises me... Some people swear by K&N, mostly people with normally aspirated engines who need the absolutely lowest restriction and don't care about longevity. With the volume of air our Turbo Diesels consume, better filtration is important.

 

[MMonday]

Thanks for the input, I have light oil on my blades but the bearings feel good. Think ill put the factory filter back in now dont need to buy a turbo! just dropped 2500. on new pump from Blue chip.

 

[dresslered]

K&N has proven (over and over again) to let more dirt into the engine than stock filtration. The claim of better airflow is not substantiated unless you are highly modified. For most applications, the engineers at Chrysler did their homework right.

 

[jgillott]

This subject reminds me of the oil theads of years ago as much as it comes up.