Will a K&N Air Filter Keep Mice Out?

Discussion in 'The Garage' started by Guano11, Oct 8, 2019.

  1. Guano11

    Guano11 Stop me if you've heard this one....

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    A varmint gnawed his way into my OEM air filter (Lexus IS300).
    Not sure what, if anything, made its way through the intake tract, or how long the filter's been compromised -- but my thought is that a K&N replacement, with its oiled media sandwiched between mesh screens, would thwart subsequent attacks?

    Wondering if anyone's had any similar experience? Google didn't reveal anything specific to the issue...for me, anyway.
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  2. szurszewski

    szurszewski Long timer

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    Don't know how they feel about oil, but they can sure gnaw through mesh - metal or not.

    Actually, come to think of it, the last time I had a full scale incursion was in a truck with a K&N filter (full size Chevy with one of those large "drum" type filters); they built a full on condo in there with rooms for food storage, bedding, and a nice little restroom. Ugh. Maybe they actually LIKE the oil?
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  3. Guano11

    Guano11 Stop me if you've heard this one....

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    ^^ Aw geez. NOT the answer I was hoping for! Especially since I already bought the $85 filter....
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  4. szurszewski

    szurszewski Long timer

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    Sorry - at least you'll have all those horsepower and fuel economy increases.

    Just noticed your location, and that's not going to be a happy thought either as the little buggers got into our truck in the PNW as well. Sorry :(

    I've heard mothballs in a mesh bag in the engine compartment help, as do scented dyer sheets stuck in there somehow - I've never tried either. I've only had - so far - the problem with that one truck, but my family (who live in a very woodsy kind of neighborhood near the Capitol Forest) have found nests in several cars over the years. Luckily the critters have just eaten air filters and engine bay insulation so far - no wiring problems ... yet....
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  5. foxtrapper

    foxtrapper Long timer

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    I have cobbed up mouse screens using 1/4 hardware cloth in front of various intake openings. Seems to work well enough at holding them at bay.
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  6. trumpet

    trumpet Group W Bench

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    Re-oil your K&N with peppermint oil. (only slightly kidding)

    Use a combo of peppermint oil and mothballs to keep the rodents at bay. Along with a barrel trap in the garage.
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  7. Guano11

    Guano11 Stop me if you've heard this one....

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    Well I was really hoping the K&N alone would be sufficient. :dirtdog

    The Toyota parts guy mentioned the dryer sheets trick, but also heard that something called
    “apple bitters” worked, too. Sold at pet stores, it’s supposed to keep pets out of places they shouldn’t be in. Peppermint sounds like it smells better, though.

    Car is parked under a 3/4 carport with a car cover. Technically it’s my go-to daily driver, but I commute almost all the time on motorcycle. Gets driven maybe once a week, often less. I’ve also found evidence of bug presence in the form of those little white web bundles tucked in a body panel seam on occasion.

    Probably ought to drive it more. Maybe keep it uncovered. The thought of the wiring harness getting munched on makes me really nervous!

    Appreciate the responses, fellas. :beer
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  8. concours

    concours WFO for 47 years

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    Likewise.
    Tin snips, weatherstrip cement to attach.
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  9. DonM

    DonM Do-dah Do-dah Supporter

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    +1
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  10. Motomantra

    Motomantra Registered Lurker

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    I've had more than one car come in with a noisy heater fan. Sometimes it's just normal debris in the impeller, but occasionally there's a mice nest. 1/4 mesh screen over the fresh air intake has stopped them. Once a year I recommend vacuuming it, as leaves, etc. can work their way onto it.
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  11. Guano11

    Guano11 Stop me if you've heard this one....

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    ^^ That's a good tip.
    FWIW, I was surprised to learn K&N offered a cabin air filter for my car as well; I assume it's reusable, but I don't know if it's oiled media sandwiched between screens.
    #11
  12. kantuckid

    kantuckid Long timer

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    We have a rodent assortment that eats on our stuff. In my storage barn the pack rats build nests in any spot they can find on farm tractors, riding mowers, so on. In our driveway we have mice-house and deer mice, squirrels-red & grey, chipmunks galore and they eat stuff you'd never think they'd like. They have eaten most of the cold weather pkg battery insulation, which is probably used for nesting material. They eat wires. They eat filters. They use the engine intakes and covers for their dining area-acorns, buckeyes, daffodil and tulip bulbs.
    Moth balls, wintergreen oil, etc., is a waste of $$$ IMO. Cats(I hate cats), poison or traps all work.
    On the 4 Tundras I owned they loved to get up in the fresh air intake and build a nest against the cabin air filters. The would eat the filter material for nesting material and the obvious, but gradual way the mess became known was when the fresh air got meager and you couldn't see in a rain storm.
    Rat wire/hardware cloth generally stops them. Why vehicle engineers don't accept they exists is beyond me!
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  13. katbeanz

    katbeanz earthbound misfit, I Supporter

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  14. millman84

    millman84 Been here awhile

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    I had a mouse build a nest in my DR650's air box. The K&N air filter was intact and held the fiberglass nesting material out of the intake.
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  15. brgsprint

    brgsprint Long timer Supporter

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    I have traps in my small shed. I make a mark on a wall for every one I trap. Since September '18, I've killed 82 mice, 3 chipmunks and a rat. They eat the D-Con poison, too. Haven't had a nest in a machine in a while.

    I have added 1/4 hardware cloth to some openings to my foundation but I think that has been counterproductive. It also keeps snakes out who help keep the mice at bay.

    I should check my wife's motorcycle for 4 legged squatters. Her cancer didn't let her ride this year, so it hasn't moved in months.
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  16. Bounder

    Bounder Typing...

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  17. Guano11

    Guano11 Stop me if you've heard this one....

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    Crimony. You could make a horror film featuring those varmints.
    Regarding cats....reminds me of that children's book where mice were infesting a castle, eating the king's cheese. So he gets some cats. Then he's overrun with cats. So he gets some dogs....
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  18. Guano11

    Guano11 Stop me if you've heard this one....

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  19. kantuckid

    kantuckid Long timer

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    I had a cat show up and deliver her litter in my barn a couple years back. I called the local dog & cat pound and was told they'ed come and get it if I caught it. They'd then feed it, have it checked out for health issues then "repatriate" the whole bunch to my property as found. Said it was their policy with feral cats. It moved on on it's own.
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  20. scapegoat

    scapegoat Pushin forward back

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    Yep, a screen of 1/4 metal mesh on the airbox intake and heater intake if you can get to it. A friend was told about Critter Ridder to curb the bastages from getting under his mobile home. Gonna try that one out and see how it works. The dryer sheet trick was turned into a rat bed when I tried that one. We leave our hoods open anymore at night which also works.
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