asasa11

Looking at the sun.( air filter test)

Messages
1,148
Location
USA
Direct sunlight is a good way to check for pinholes in any medium. Those holes are pretty bad and would have been letting dust through. Small area etc etc, but they still let dust through and probably most of it sand. More than one would think since the rest looks clogged.Might be good to check new filters in the sun especially from places where customers can play with them. Might be good to put in a restriction gauge in that use.
 

CT8

Messages
15,409
Location
Idaho
Living in the desert is dusty hence the air filter gets clogged faster. Get an off road air filter kit that has the air intake at the roof level..
 
Messages
9,492
Location
Ontario, Canada
Is your intake sucking air out of a dusty area? Or the wheel well has some broken plastic letting dusty air into the intake? I assume you're not tailgating people down gravel roads! Maybe go tractor style with a centrifugal filter housing sticking out of the fender!
 

CT8

Messages
15,409
Location
Idaho
Originally Posted by wemay
Sunlight test is useless and non-scientific. K&N allow sunlight through because the oil is transparent enough to allow it to happen.
Are you serious?
 
Messages
656
Location
Richmond, VA area
Are folks not understanding the basics of how a K&N works? Cotton gauze medium. Lets sunlight through. Spray it with an oil that acts as a filter to trap particles. Still see sunlight through b/c oil isn't opaque. ? If you were running a K&N with no oil, yes, that would suck. hahahahaha
 
Messages
96
Location
Florida
Originally Posted by Chris142
Originally Posted by rob1715
If it's really dirty only after 7k miles, isn't that good? Means collecting lots of dirt.
Ya but replacing a filter 2x a year crzy
If that's what it takes, then yes.
 
Messages
1,978
Location
Northeast
" The sun was directly behind the filter. Unable to pass light. " I also use this method . Especially for the '13 FIT . Worst engine air filter for getting soiled of all cars owned . Change engine filter every 12 > 18 months . Always replace in late spring when there's no road salt dust and dirt on roads .
 
Last edited:
Messages
3,075
Location
Parts Unknown
Originally Posted by wemay
Sunlight test is useless and non-scientific. K&N allow sunlight through because the oil is transparent enough to allow it to happen.
It's not the red dyed oil that does it. It's due to the cotton gauze construction, where due to random layering of the gauze material, you occasionally get gaps in the layered material
 
Messages
3,075
Location
Parts Unknown
Originally Posted by wemay
Sunlight test is useless and non-scientific. K&N allow sunlight through because the oil is transparent enough to allow it to happen.
It's not the red dyed oil that does it. It's due to the cotton gauze construction, where due to random layering of the gauze material, you occasionally get gaps in the layered material
 
Messages
5,833
Location
Texas Hill Country
I throw filters out in San Antonio once a year. About 12-15k miles. I guess stock up and throw them out for your vehicle every six months. I have had good luck with house brand filters from amazon, they fit well. Mine as well do the cabin filter 2x per year as well.
 
Top