k/n air filter - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-05-2010, 03:25 PM   #1
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Anybody have problems after installing k/n air filter?
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Old 07-05-2010, 04:59 PM   #2
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Have to be more specific,

did you install a cone or a drop in (factory replacement) filter?

what problems are you having?
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Old 07-05-2010, 08:38 PM   #3
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Potential problems with installing a K&N filter is that the oil from the filter tends to coat the elements on the MAF sensor. Which causes driveability issues.
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Old 07-05-2010, 11:56 PM   #4
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With over 5 years of K&N filtering in 5 of my own cars and more years of others' cars, I can say wholeheartedly that I've never had any issues with filter oil.

Air box stock replacement:
This does actually help, as I've noticed with the butt-dyno though I haven't empirically tested it. Advantages are that you get stickers and a filter you never have to replace. After 12K-mile filter replacements for 60K miles, you've just paid more than what it costs to buy one K&N, and the original K&N would still be fine whereas you'd have to put in your 6th $10+ filter. Plus, these are actually better. They're better with oil but worse without it as compared to paper filters, so re-oil them every 10K miles. One re-oiling kit costs $10 and lasts about 10 resprays.

Conical K&N filters
On this page, ZZ Performance states that using a conical filter provides better volumetric efficiency than an open tube. Being that a flat filter in a rectangular prism decreases volumetric efficiency, you do get truly more power out of your car with this filter. Plus, there'* the longevity thing as stated above.
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Old 07-06-2010, 12:42 PM   #5
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I've heard that oil tale but I honestly think its from people over oiling their filters. I've never had problems with them.
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