K & N Filter - Ford Powerstroke Diesel Forum
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Old 10-26-2007, 05:11 AM
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K & N Filter

I have a k & n air filter and air intake box on my truck. I have heard bad things about the k & n filter and diesel motors. Would another brand of filter fit in the box so I could replace my k & n?
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Old 10-26-2007, 05:19 AM
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I've,used K&N filters for years on my stroke and my two C-5 Corvettes with no problems.
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Old 10-26-2007, 05:41 AM
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Quote:
Originally Posted by Grindem View Post
I have a k & n air filter and air intake box on my truck. I have heard bad things about the k & n filter and diesel motors. Would another brand of filter fit in the box so I could replace my k & n?
You should replace the whole intake with a cold air intake. Get rid of the K&N, I have pictures that were posted on here at one time of a K&N with holes in it. because the turbo sucked dirt completely through it. When it did this it took part of the filter element with it. I was lucky and did not have any engine damage. But I got rid of the K&N filter and put the Napa 6637 tymar filter on my truck.
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Old 10-26-2007, 05:45 AM
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You just have to be careful to maintain the filters, then USUALLY they are fine... but

most people are talking about the CONE filters for the aftermarket intakes...the K&N's generally allow more particles thru than some of the other filters available like AFE.

as far as drop-in's -- I'd just make sure you keep your K&N in good condition and periodically check your intake tube for any dust... if you see some, get a new intake/filter!
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Old 10-26-2007, 10:38 AM
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90% of the issues with K and N filters are the drop in pannel filters, there kits are not bad, service like the directions show and there no worse then any other oiled filter.
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Old 10-27-2007, 07:47 AM
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I have a K&N FIPK Intake System and had the same worries. I took mine off and the intake tube was spotless! This is in sandy and dusty conditions here in Florida.
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Old 10-27-2007, 08:18 AM
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I have friends at Milford Tech school here in Nebraska and their instructors told them that K&N used to be good, but the design now allows for to much dirt. The extra little horse power is great, but you are also shorting the life of your engine. Just what I have been told.
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Old 10-31-2007, 06:13 AM
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CSIPSD is correct, the K&N intake systems are not the problem, although there is much better. The K&N's that have been known to dust many PSD's is the drop in filter. This hasn't happened on just one truck, it got so bad some Ford dealers would cancel your warranty if they saw a K&N, not sure how they can do that but I have read that they did. I would think any replacement paper filter would be better than the K&N piece. If you want the best possible filtration with increased air flow go with the AIS system. This is what I have done and I am very happy with it. Powerstrokeshop.com has the whole AIS system for $200, ask for Bob.
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