K&N replacement filter for the CRD

off2gofishing · **Posted:** Fri Sep 23, 2005 11:03 am

Although K&N didn't list a replacement filter for the CRD, I contacted them and they said the 33-2233 fits.

gundrted · **Posted:** Fri Sep 23, 2005 2:55 pm

THIS IS NOT A FLAME

personally i wouldnt put an air filter (any not just k&n) in a crd that uses oil. the oil can cuase a lot of issue with air flow and air temp sensors

Spowers · **Posted:** Fri Sep 23, 2005 3:50 pm

There was a post on the old board about this, the filter was causing the sensors to throw codes. Although there were a couple guys using them. Seems there is a huge NO-NO on the TDI diesel board about the oil based filters.

n3qik · **Posted:** Fri Sep 23, 2005 10:37 pm

I have one now, no codes. The problems are if you overoil it then there are codes/damaged.

off2gofishing · **Posted:** Fri Oct 28, 2005 2:41 pm

No codes, ran a little smoother, no change in MPG's, but seems to have more top-end.

LibertyCRD · **Posted:** Fri Oct 28, 2005 3:07 pm

Are there any aftermarket air filters that flow better without using oil on the filter itself???

oldnavy · **Posted:** Fri Oct 28, 2005 3:45 pm

LibertyCRD wrote:

Are there any aftermarket air filters that flow better without using oil on the filter itself???

You will find nothing that flows and filters as well as OEM for durability. There have been testing done on both VW forum for Diesel VW's and a Duramax with K&N filters installed and they didn't add any hp (dyno) or mpg increase. The really big thing that they added was silica to the oil, when oil samples were tested there was a BIG increase and we are not talking no 10% or 20% but more like 500% increase. Check out this link. http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm

boxhead · **Joined:** Fri Jul 08, 2005 11:14 pm **Posts:** 186

Well I can tell you my mechanic said he LOVES oil based filters. Said he makes good money off of cleaning O2 sensors. :lol:

oldnavy · **Posted:** Fri Oct 28, 2005 4:20 pm

The only time I would use a K&N filter or similiar filter is when off roading in the mud & water where water or wet mud might get to the filter that would cause a OEM type paper element to fail.

Guyute1210 · **Posted:** Fri Oct 28, 2005 4:55 pm

oldnavy wrote:

The only time I would use a K&N filter or similiar filter is when off roading in the mud & water where water or wet mud might get to the filter that would cause a OEM type paper element to fail.

Water and Oil doesn't mix...this will cause the water to go through the filter. Paper ones will get soggy and ruined, but that's before the engine does. I use a K&N w/o problems, but when i go wheelin', i drop in a paper one.

oldnavy · **Posted:** Fri Oct 28, 2005 6:35 pm

Guyute1210 wrote:

oldnavy wrote:

The only time I would use a K&N filter or similiar filter is when off roading in the mud & water where water or wet mud might get to the filter that would cause a OEM type paper element to fail.

Water and Oil doesn't mix...this will cause the water to go through the filter. Paper ones will get soggy and ruined, but that's before the engine does. I use a K&N w/o problems, but when i go wheelin', i drop in a paper one.

Then you are using them the obsite they were originally used for, the K&N will actually keep out the water and will not suddnely fail and be injested and in the process hydrolock a engine like a paper filter. We found that out over 35 years ago, that led to the use of wet/dry shop filters being adaped by us weekend mudslingers and creek forders. That's what I had on my old '86 CJ 7 20 years ago. I've even seen wet snow self destruct a OEM filter.

And as I said if you change the oil every 2,000 or 3,000 miles you will not have a problem, unless you keep it too long or do 5,000 to 10,000 mile oil changes like I have done the last 28 years and only using OEM filters. No I have never had a car leak or use oil and owned them all to the 140,000 to 180,000 mile mark with two being serviced with same oil and service periods now after 18 years. One a 87 Cherokee (sold to neighbor and still in daily use) the other a 75 Olds 98 2dr broughamn.

spoonplugger1 · **Posted:** Fri Oct 28, 2005 7:11 pm

When I did some tests for the military some years ago the Donaldson filter flowed the best while filtering well. The downside is that they only make them for the military and heavy offroad equipment. One filter that did very well and sells automotive sizes is Baldwin. Their oil filters also did extremely well in our tests. Amsoil, Hastings and Baldwin were all made at the same place at that time for the oil filters. The bigest problem with oil filters we found was not the medium used, but the construction of the filter itself and the valves inside. Most didn't do their jobs well here.

crdawg · **Joined:** Mon Sep 12, 2005 10:55 pm **Posts:** 98

AEM make a dryflow synthetic filter that they say flows at 99.4% filtration at as small as 1 micron.no filter oil issues cleanable and reusable,wont degrade with water.perfect solution except i cant find a listing for the liberty yet,however you can become a tester if you live in so. calf.

oldnavy · **Posted:** Sat Oct 29, 2005 6:40 am

crdawg wrote:

AEM make a dryflow synthetic filter that they say flows at 99.4% filtration at as small as 1 micron.no filter oil issues cleanable and reusable,wont degrade with water.perfect solution except i cant find a listing for the liberty yet,however you can become a tester if you live in so. calf.

I have heard of them, a friend is a major AMSOIL distrubtor ( http://www.lubricationspecialist.com/ ) and he has said that AMSOIL is trying to market them or going to market them not sure which it was.

Bubba · **Joined:** Thu Sep 15, 2005 7:34 pm **Posts:** 46

Okay, where does someone but an AC Delco A2941C? I have checked Autozone, O'Rileys and NAPA.

oldnavy · **Posted:** Sat Oct 29, 2005 5:26 pm

Bubba wrote:

Okay, where does someone but an AC Delco A2941C? I have checked Autozone, O'Rileys and NAPA.

That's is the OEM filter for a Duramax diesel, and you would get it at the Chevy dealler. This report is about the quality of OEM airfilters and aftermarket filters and these are filters specific to the test truck which was a Chevy Duramax diesel PU truck. It's about showing you how poorly some popular aftermarket filters filter the air going into the engine and their effect on airflow intake into the engine.

K&N replacement filter for the CRD

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