K&N filters

ShinerBock wrote:

RedRocket204 wrote:

FishOnOne wrote:

Flashman wrote:
I took a sales man advice and switched from the paper OEM to a foam uni filter on my Polaris RZR. I dusted the engine in just one ride.

Reading a story like this from anyone else would be hard to believe, but coming from you makes perfect sense.

Reports that Polaris has also had OEM paper air filter problems too from not sealing well. Seems typical for Polaris products. I wouldn't use Polaris to gauge OHV quality engineering. Just take a look at the immense amount of recent recalls they have going on, some of them for machine fires where people have been killed.

I would say about 99% of dusted engines today is from improper seal or containment in the intake and NOT due to filter efficiency. I think people severely underestimate how much dirt you have to get into an engine to cause immediate catastrophic failure. The small amount of dust from even a poor quality filter with a lower efficiency will filter enough that there will not be any immediate effect, but rather have long term effects like increased oil consumption over time due to the cylinder walls being scared.

If someone's engine locked up immediately after a filter change and got dusted then it was either improper installation, a defect in the filter, or a defect in the air intake box/piping. I seriously doubt it was due to the filter media not filtering enough.