anybody here endorse them for use with diesels? I understood they let too much dirt through for use with a diesel...
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Lots of people like 'em, and it is possible that you will too. Personally, I've never been able to find filtration efficiency numbers so I don't trust them to remove the dirt that the OEM filter will.

If you're looking for more airflow and filtration efficiency isn't important, remove the filter entirely.

I doubt that there will be any power improvement with a lower-restriction filter in a stock turbodiesel, you are limited by the wastegate not the air filter, don't know what year/model you car is though or if it's a turbo.

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Gone to the dark side

- Jeff

http://www.bobistheoilguy.com/airfilter/airtest3.htm

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car

I hear they collect more dirt than a OEM filter. I didn't know this about 2 years ago and bought a K&N for my TDI, then after lots of discussion about it on the TDI forums, I took it out and threw it in the garbage.

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-justin

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon

I know lots of people poo-poo them. Several years ago I had a '79 F100 w/a 302 that I put a K&N on and there was a notable performance gain. But that was strictly a street truck used in suburbia so dust was never really a big concern for me. I've never used one on any of my newer vehicles because I guess there's just enough of a question about them in my head.

I don't think I'll be adding one to my TD anytime soon. It'd be like blood-doping a donkey for the Kentucky Derby.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)

Try driving your car with the stock filter, then remove the stock filter and drive the car with no filter. See if your 0-60 times drop.
I doubt you will see much change.

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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png

I had a K&N on my 409d for a while. It was too noisy.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I work on alot of Dodge-Cummins powered pickups and EVERY one that had a K&N, I would find fine oily grit at the turbo inlet. I DON'T run one in my truck!!
I usually go one step further in that when I install an air filter, I put a thin film of light grease on the rubber seals.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

Ladies and gentlemen, do not do what this man has suggested.

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-justin

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon

just my 2 cents, i installed a cone air filter on my 300SD, however it is not a k&n it is some other brand with more of a filter media to it. while i dont notice any power gains " and i have no wishfull thinking", i do find that the turbo spools up faster and it sounds damn good!!!!!!!!!!

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82' 300SD

I had a K&N in my Olds gasser for several years. It got oil all over the oxygen sensor (or whatever it is) in the air intake. I noticed no difference in performance or fuel economy and went back to the stock air filter.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I'd switch back to the OEM setup soon. You're drawing in hot underhood air, I doubt that's good for the engine. I'd rather have longetivity than the ability to hear a turbo spool up. Your turbo is not spooling up any faster either, it's just loud now without the OEM setup and sounds like it's going faster. If it were spooling up faster there would be a noticable power gain, which you claim not to have.

AND, for those who switch to these "cold air/high performance intake kits" because they're tired of replacing broken air cleaner brackets every few years, here's the fix that will stop that.
http://mbca.cartama.net/showpost.php?p=89120&postcount=3

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

GM recently issued a technical service bulliten, that warns against the use of oiled filters, and states that warranty claims on MAF sensors won't be honored if one is present.

Ah, yes, that's what got all oiled up in my Oldsmobile after 30,000 miles of K&N. Don't remember whether my mechanic replaced it or whether it was cleanable. I'll bet he replaced it for safety's sake.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Don't waste the money. There will be no performance difference.