K & N Air Filter - Ford Powerstroke Diesel Forum
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Old 01-06-2013, 01:33 PM
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K & N Air Filter

I've been using a K & N air filter in my diesel van for the last 20K miles. Van has 178k on it. Do I need to switch to the napa 6637? Seems like I would have to switch out the air intake right? Should I just get an air filter which would fit into my current stock air intake setup? Which brand? Thanks in advance for your input.

Kent
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  #2  
Old 01-06-2013, 01:39 PM
Can you hear the derail??

 

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We use a piece of 4" pipe from the turbo inlet to the filter and remove the stock intake, not sure how much space you have for this in your van tho, but that k&n will dust your turbo
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Old 01-06-2013, 03:52 PM
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In don't know how possible the BHAF mod is on a van. I'd get rid of that k & n pronto tho and just put in a stock air filter until you can figure out getting a 6637 in there.
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Old 01-06-2013, 11:22 PM
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thanks guys...I'm curious what you mean by the term "dust my turbo" Does the K and N allow something through that a stock filter doesn't?
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Old 01-06-2013, 11:27 PM
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The K&N doesn't filter nearly as well as the stock air filter, will let dust and dirt particles into your intake and destroy your turbo..."dust your turbo"
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Old 01-06-2013, 11:33 PM
Can you hear the derail??

 

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The dust pits the turbo fins, as well as gets in the bearings, eating it up
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Old 01-07-2013, 06:52 AM
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If so, then K and N are not good for my Tauras or wife's corolla? I thought they offered better filtration than stock filters...(or is it that they are just not good for Turbo Diesel engines?) Thanks again everybody. This forum rocks
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Old 01-07-2013, 08:40 AM
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K&N's are forbidden on ANY Toyota since the late '90's. It on the car can void your warranty. I've worked as a mechanic for Toyota for a spell and in the early 2000's it was actually stated in the manual NOT to use a K&N filter on the vehicle. Ford's don't have the same issues as Toyota but the problem is the same The oil used by K&N (and only K&N) clogs the MAF sensor and with a little heat dries permanently to the sensor. Several hundred dollars to replace. Not worth the $70 filter.
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Old 01-07-2013, 09:21 AM
Can you hear the derail??

 

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They flow better, but more air does not equal more filtration
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Old 01-07-2013, 09:37 AM
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Ive had a k&n on my truck for 10 years and the intake tube and turbo are clean with no dusting.
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