Cleaning Air Filter

Discussion in 'Mustang Chit Chat' started by Forty61, Aug 5, 2022.

  1. Forty61

    Forty61 forum member

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    Seems there’s a wealth of differing opinions out there so figured I may as well ask you guys what you’re doing on your cars..

    I have a JLT intake on my car, filter is in decent shape but pretty overdue for a cleaning or replacement. While I have the car on stands I’m going to do some of the things I’ve been putting off and the filter is one of them. Best method to clean the actual element? Should I buy a cleaning solvent or just use soapy water and dry it in the sun? Is re-oiling the filter really necessary? Should I just buy a new filter and be done with it?

    I know this isn’t as exciting as coming in here with a question about a blower or changing suspension components but let me know your process!
     
  2. pass1over

    pass1over I like it LOW

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    I bought a K&N recharge kit to use on my JLT filter. I think I've gotten about 6 or so cleanings out of the kit and there's still enough for at least 3 or 4 more. Been doing this for 10+ years and 190k+ miles with a JLT filter

    Follow directions but spray hose from inside the filter so you wash stuff out of it and not into the filter.
     
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  3. Midlife Crises

    Midlife Crises Senior Member

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    I’ve used K&N filters for years and currently a Roush filter. Wash them with warm water and dish washing liquid, lightly brush the stubborn spots and blow the water out from the inside with compressed air. Don’t get carried away with the air. Let them dry overnight and oil with K&N filter oil. Let the filter set overnight again, blow the access oil out of the filter, wipe it off real well and it’s ready to go. If you have two filters you can store a clean, oiled filter in a plastic bag until you need it.:driver:
    By the way; Gauze air filters without oil don’t filter anything.
     
    Last edited: Aug 5, 2022
  4. crjackson

    crjackson Member

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    I recently went through this. I just bought a new Roush filter, the cleaned the old one with the K & N Kit. I was amazed how filthy it was, and how clean it came. I haven’t oiled yet, as I’m’m good for now, but I guess I should go ahead and do that too. This way I’ll always have a spare ready to go.
     
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  5. Midlife Crises

    Midlife Crises Senior Member

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    Don’t forget the plastic bag. Everything in the world will stick to the filter after its oiled
     
  6. crjackson

    crjackson Member

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    Yeah, I didn’t forget. Thanks.
     
    delbecque likes this.
  7. Laga

    Laga Senior Member

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    Instead of compressed air, use a shop vac. High volume, low pressure will not harm the cotton element.
     
  8. jewc75

    jewc75 S197 Junkie S197 Team Member

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    I use simple green to clean mine and let it dry in the sun. I have a spare as well.
     
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  9. OLD 96

    OLD 96 Junior Member

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    I just recently got my 2008 GT. It has K&N filter. I bought the K&N cleaner & recharge kit and followed the instructions. It was pretty dirty.
     
  10. atomicpunk

    atomicpunk Junior Member

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    I used the K&N kit and Simple Green to clean my filters, sprayed it from the back with water, let it dry in the sun.
     
  11. Forty61

    Forty61 forum member

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    Thanks for the input guys, I picked up a new filter from Summit since I was passing by, I’ll slap it on and clean the old one as a spare for the next change.

    I’ll probably pick up the K&N kit to re-oil it, seems to be a lot of interesting opinions on alternatives including WD-40 and ATF!
     
  12. Laga

    Laga Senior Member

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    Don’t listen to them. Only use the oil designed for the filter. And use less than you think is necessary. It’s easy to over oil.
     
  13. GriffX

    GriffX Member

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    I have some problems with the oil spray. I find it hard to get an even layer of oil, especially inside the ribs. Unfortunately there is no UV active dye inside. Is there some good advice to get it even? I sprayed it tangential from both directions.
     
  14. Laga

    Laga Senior Member

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    Don’t worry about it. The oil will even itself out by wicking through the cotton. Check it again in a week and look for light colored areas and then touch up if necessary.
     
  15. Forty61

    Forty61 forum member

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    Thats the plan, just found it interesting the weird solutions people have. I’ll probably try find the oil to put in a drip bottle rather than the spray if possible.
     
  16. Laga

    Laga Senior Member

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    My buddy had a 04 Bullitt. He over oiled the K&N and it threw a bunch of codes. It was easy to tell because there was a puddle of red oil under the filter.
    Sadly, about a month later, his teen age kid did an oil change, and the rubber gasket of the old oil filter stuck to the block. He didn’t notice and put the new filter over it. By the time he realized something was wrong on the test drive, the engine was toast.
     
  17. crjackson

    crjackson Member

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    Stupid ass kids! This is not something you want them to learn by experience!


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  18. totaljustice

    totaljustice Junior Member

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    Something I do is after oiling I will set the filter on it's side resting on folded up paper towel and let that sit overnight. Then gravity helps wick any excess oil out of the filter.
     
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