K&N Air Filter Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Zonaman · 10-31-2005, 12:04 PM

I drove my truck through some particularly nasty dust storms this summer. It inspired me to recharged my K&N air filter this past weekend. I'd like to poll some opinions on the suggestions they make from other K&N owners (Especially the folks from the dusty Southwest). I'm wondering about this paragraph from the recharge instructions:

1) Service every 50,000 -100,000 miles on street driven applications.
2) Service often in off-road or heavy dust conditions or when air filter reaches 18" of restrictions.
3) Let the dirt "build-up" work for you; it will not hurt the performance and actually help filter the air.

The poll queireis how many of you let that filter go the full 100,000 miles. Also, just what is "18" of restrictions" Surely they don't mean a layer of crud 18" inches thick! And how does a build-up of dirt actually improve air filter performance?

70rs/ss · 10-31-2005, 02:44 PM

my .02 cents, the 18" would be 18" of vacume (measurement of the amount of restriction) and the dirt particle builup actually gathers more dirt which improves the effectiveness of the filter. I live in AZ as well and I clean as needed, which means if it looks cruddy I clean it. No ryme or reason, because one dust storm can clog it, so check it regularly and clean when it looks dirty.

Longhorn Man · 10-31-2005, 03:45 PM

Quote:

And how does a build-up of dirt actually improve air filter performance?

Becouse the K&N filter has been proven to not work too well, it lets tii much crap into the engine. Therefor, once you have alayer of dirt on the filter, it can actually start to filter a little bit.

Bill72BB · 10-31-2005, 07:35 PM

I'm one that 86'd my K&N and went back to a paper filter , my oil is a lot cleaner now . JMO

kelsfine69 · 10-31-2005, 07:52 PM

Seen for myself 2 engines fail from dirt and they both had K&N ....M2C

1STtimePRo'71 · 10-31-2005, 11:19 PM

I agree. All I buy are NAPA filters. Not sure who makes them though, but that doesnt matter cause I can buy three of them for the price of one K&N.

**Stocker** · 11-01-2005, 09:54 AM

I always did it each 30K miles, but I am now back to using paper filters...

View Poll Results: At what mileage do you recharge your K&N filter?
Before 50,000 (regardless of conditions)	11	84.62%
Between 50,000 & 70,000	2	15.38%
Between 70,000 & 90,000	0	0%
Around 100,000	0	0%
Voters: 13. You may not vote on this poll

10-31-2005, 12:04 PM	#1
Zonaman Registered User Join Date: May 2004 Location: Chandler, AZ Posts: 519	K&N Air Filter Questions I drove my truck through some particularly nasty dust storms this summer. It inspired me to recharged my K&N air filter this past weekend. I'd like to poll some opinions on the suggestions they make from other K&N owners (Especially the folks from the dusty Southwest). I'm wondering about this paragraph from the recharge instructions: 1) Service every 50,000 -100,000 miles on street driven applications. 2) Service often in off-road or heavy dust conditions or when air filter reaches 18" of restrictions. 3) Let the dirt "build-up" work for you; it will not hurt the performance and actually help filter the air. The poll queireis how many of you let that filter go the full 100,000 miles. Also, just what is "18" of restrictions" Surely they don't mean a layer of crud 18" inches thick! And how does a build-up of dirt actually improve air filter performance? __________________ 69 C-10 LWB, 350, 700r4, 3.73 posi-traction, front disc brakes. Built for the desert- She can take the heat! Vivat Rex Chevus!

10-31-2005, 02:44 PM	#2
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: K&N Air Filter Questions my .02 cents, the 18" would be 18" of vacume (measurement of the amount of restriction) and the dirt particle builup actually gathers more dirt which improves the effectiveness of the filter. I live in AZ as well and I clean as needed, which means if it looks cruddy I clean it. No ryme or reason, because one dust storm can clog it, so check it regularly and clean when it looks dirty.

10-31-2005, 07:35 PM	#4
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,980	Re: K&N Air Filter Questions I'm one that 86'd my K&N and went back to a paper filter , my oil is a lot cleaner now . JMO __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

10-31-2005, 07:52 PM	#5
kelsfine69 18 Till I Die Join Date: Mar 2005 Location: Alberta, Canada Posts: 1,522	Re: K&N Air Filter Questions Seen for myself 2 engines fail from dirt and they both had K&N ....M2C __________________ 2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home...

10-31-2005, 11:19 PM	#6
1STtimePRo'71 Registered User Join Date: Feb 2005 Location: Lake Crystal, MN Posts: 656	Re: K&N Air Filter Questions I agree. All I buy are NAPA filters. Not sure who makes them though, but that doesnt matter cause I can buy three of them for the price of one K&N. __________________ -Cory 1967 2 Wheel Chevy

11-01-2005, 09:54 AM	#7
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,695	Re: K&N Air Filter Questions I always did it each 30K miles, but I am now back to using paper filters... __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay



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