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Thread: K&N air filter does not fit, don't buy it

  1. #1
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    K&N air filter does not fit, don't buy it

    If you're concerned about your MPG like I am then don't buy the K&N filter for the stock airbox. It leaves a 2-3mm gap between the lid and the box itself so that the EGR (exhaust gas return) system does not work properly. I have seen a night and day difference in my city MPG. Like...from 35 or so down to 25. Youza!
    I plan on contacting K&N, never had a problem before.

    Word up!
    Christian
    '88 Accord 2.0L Carb 164K Original Miles 5-speed K&N Royal Purple



  2. #2
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    Re: K&N air filter does not fit, don't buy it

    Did you get the wrong model?

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    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    the airbox has nothing to do with the egr system, if anything your fuel economy should have gone up.

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    Re: K&N air filter does not fit, don't buy it

    The only thing I bought from K&N was an air breather,other than that I try to stay away from american after markets unless theyre the only solution to my problem.

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    carotman's Avatar
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    Re: K&N air filter does not fit, don't buy it

    I have the K&N Filter on my hatch and it seemed to fit properly.

    What part number did you get?

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    I need these parts!
    https://www.3geez.com/forum/showthread.php?t=67742

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    Re: K&N air filter does not fit, don't buy it

    Part number E-9030.
    I guess Autozone could have given me the wrong one, but sure seems to be the stock replacement.
    The EGR system recirculates exhaust gas back into the intake, it has a lot to do w/ the airbox.
    I will try returning it for another of the same, maybe it's just mine that doesn't fit right.
    But anywho, thanks 3geez!
    '88 Accord 2.0L Carb 164K Original Miles 5-speed K&N Royal Purple

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    Re: K&N air filter does not fit, don't buy it

    Nice '89 LX BTW Carotman! I love these cars. So SEXY!!!
    '88 Accord 2.0L Carb 164K Original Miles 5-speed K&N Royal Purple

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    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by pressed001 View Post
    Part number E-9030.
    I guess Autozone could have given me the wrong one, but sure seems to be the stock replacement.
    The EGR system recirculates exhaust gas back into the intake, it has a lot to do w/ the airbox.
    I will try returning it for another of the same, maybe it's just mine that doesn't fit right.
    But anywho, thanks 3geez!
    the egr recirculates back into the intake manifold, not into the air cleaner, the only thing that's connected to the air cleaner is the vent on the valve cover, it's to draw filtered air into the valve cover due to vacuum at the oil pan from the pcv system. the egr system is connected to the intake manifold itself through one of those tubes connected to the exhaust manifold, when the valve opens on top of the manifold, some exhaust gasses are draw through a passage cast into the manifold itself, and directly into the intake itself below the carburetor.
    Last edited by lostforawhile; 11-11-2010 at 06:41 PM.

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    Re: K&N air filter does not fit, don't buy it

    Several threads on K&N on here, so I won't go on, but will just mention that after installing a K&N filter on my car and unfortunately running with it for maybe 25k miles, I had the oil tested by one of those labs. It had high silicon (like sand e.g. dirt). It tested that way for the next three oil changes. So I gave up on the K&N and went back to the factory filter. Next oil change the oil was within specifications. I therefore conclude that the K&N was not doing enough filtering. I haven't missed the supposed extra 2 hp it gave me. And the CAI's that folks are fond of putting on, with their foam air cleaners on the end.....well, let's say that I hope they like the intake noise, because the crud that's making it through the "filter" is having a good time inside.
    Last edited by w261w261; 11-11-2010 at 07:17 PM.

  10. #10
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by w261w261 View Post
    Several threads on K&N on here, so I won't go on, but will just mention that after installing a K&N filter on my car, I had the oil tested by one of those labs. It had high silicone (like sand e.g. dirt). It tested that way for three times. I gave up on the K&N and went back to the factory filter. Next oil change the oil was within specifications. I therefore conclude that the K&N is not doing quite enough filtering.
    they really aren't designed for street engines, both the oil and air filters are designed for higher flow, with less filtering, this is for race applications, where the longevity of the engine isn't important. A bunch of people got the idea they would be cool to put on street cars, since they are race parts, and K&N hasn't discouraged them, just raked in the money. the OP may be confusing the system that lets fresh air into the exhaust with the EGR system, the thing connected directly to the air filter, through the box on the manifold, and to the exhaust, is simply a reed valve controlled by the computer. no exhaust comes up it, if it is, the valve is bad, it just lets fresh air into the exhaust to help the converter, this replaces the need to have an air pump. the big plastic box attached to it is just an air muffler designed to make it quieter
    Last edited by lostforawhile; 11-11-2010 at 07:10 PM.

  11. #11


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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by lostforawhile View Post
    they really aren't designed for street engines, both the oil and air filters are designed for higher flow, with less filtering, this is for race applications, where the longevity of the engine isn't important. A bunch of people got the idea they would be cool to put on street cars, since they are race parts, and K&N hasn't discouraged them.
    Not to mention that when you go through the process of washing and re-oiling the filters, if you don't follow the directions and put on too much oil, it will get sucked into the intake and cause problems with the airflow sensor.

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    Re: K&N air filter does not fit, don't buy it

    Oh and btw, when I showed up at the Honda dealer to pick up an air filter, the counter guy said I'd have to order it, they don't stock them any more. An air filter! Not totally surprising, but still.......

  13. #13
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by w261w261 View Post
    Oh and btw, when I showed up at the Honda dealer to pick up an air filter, the counter guy said I'd have to order it, they don't stock them any more. An air filter! Not totally surprising, but still.......
    honda has never really made any of their filters, they are just rebranded.

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    Re: K&N air filter does not fit, don't buy it

    They still had one at Autozone.

  15. #15
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by w261w261 View Post
    They still had one at Autozone.
    well you can get aftermarket, it just isn't rebranded as Honda with the included increase in price. Stick with quality filters like Wix or Nappa gold, same thing, and you'll be fine

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    Re: K&N air filter does not fit, don't buy it

    This guy here also experienced a big loss in MPG using K&N filters:

    https://www.3geez.com/forum/showthrea...p;N+filter+mpg
    Dr_Snooz

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    Re: K&N air filter does not fit, don't buy it

    Before all this started I was running with a NAPA SILVER filter which rendered wonderful gas mileage and fit my stock airbox.
    My advice would be to run with that and not the K&N.
    Again, thanks guys!
    3geez FTW.
    '88 Accord 2.0L Carb 164K Original Miles 5-speed K&N Royal Purple

  18. #18
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by pressed001 View Post
    Before all this started I was running with a NAPA SILVER filter which rendered wonderful gas mileage and fit my stock airbox.
    My advice would be to run with that and not the K&N.
    Again, thanks guys!
    3geez FTW.
    I don't think they make the silver anymore, the Nappa gold is Wix, thats the one to get.

  19. #19
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by pressed001 View Post
    If you're concerned about your MPG like I am then don't buy the K&N filter for the stock airbox. It leaves a 2-3mm gap between the lid and the box itself so that the EGR (exhaust gas return) system does not work properly. I have seen a night and day difference in my city MPG. Like...from 35 or so down to 25. Youza!
    I plan on contacting K&N, never had a problem before.

    Word up!
    Christian
    Will someone PLEASE explain to this guy that the EGR system does NOT dump into the airbox on a carb car? I explained how it works a few posts down, but I got a pm explaining that I know nothing, it dumps straight into the air box, and a carbed car has no manifold??!!!

  20. #20
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    Re: K&N air filter does not fit, don't buy it

    Yeah, I had a few too many last night and thought that pigs fly too... Sorry lostforawhile!
    In all seriousness though, there is a hose that goes straight from my exhaust manifold to the airbox inlet, no valves, just a straight hose that hooks right on into the airbox inlet. Though that may not be the egr system in it's entirety, it seems to me to be part of it and perhaps a significant one.
    Hah! They don't even make the silver, that's scary! I bought this car a year ago and replaced the air filter a month ago and pulled out this old nasty napa silver filter. Makes me wonder how old it really is!
    I'll post pics of this exhaust gas hose later today! I will also contact K&N and post what they have to say.
    As always, thanks for being cool guys!
    '88 Accord 2.0L Carb 164K Original Miles 5-speed K&N Royal Purple

  21. #21
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by pressed001 View Post
    Yeah, I had a few too many last night and thought that pigs fly too... Sorry lostforawhile!
    In all seriousness though, there is a hose that goes straight from my exhaust manifold to the airbox inlet, no valves, just a straight hose that hooks right on into the airbox inlet. Though that may not be the egr system in it's entirety, it seems to me to be part of it and perhaps a significant one.
    Hah! They don't even make the silver, that's scary! I bought this car a year ago and replaced the air filter a month ago and pulled out this old nasty napa silver filter. Makes me wonder how old it really is!
    I'll post pics of this exhaust gas hose later today! I will also contact K&N and post what they have to say.
    As always, thanks for being cool guys!
    that hose should attach to a bunch of stuff bolted on top of the manifold, in front of the carb, it looks like part of the manifold but it's not. there should be a vaccume diapham attached to it, honda calls it an air suction control valve, it basically allows the computer to contol that reed valve and how much oxygen is in the exaust

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    Re: K&N air filter does not fit, don't buy it


  23. #23

    Nafs Asdf's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by pressed001 View Post
    Yeah, I had a few too many last night and thought that pigs fly too... Sorry lostforawhile!
    In all seriousness though, there is a hose that goes straight from my exhaust manifold to the airbox inlet, no valves, just a straight hose that hooks right on into the airbox inlet. Though that may not be the egr system in it's entirety, it seems to me to be part of it and perhaps a significant one.
    Hah! They don't even make the silver, that's scary! I bought this car a year ago and replaced the air filter a month ago and pulled out this old nasty napa silver filter. Makes me wonder how old it really is!
    I'll post pics of this exhaust gas hose later today! I will also contact K&N and post what they have to say.
    As always, thanks for being cool guys!
    I think you're talking about the hot air pipe.

  24. #24
    3Geez Veteran lostforawhile's Avatar
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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by Nafs Asdf View Post
    I think you're talking about the hot air pipe.
    I think you are right, I didn't think of that, does it attach to the air inlet on the air cleaner? that just pulls hot air from around the manifold when the inlet air is too cold

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    Re: K&N air filter does not fit, don't buy it

    Quote Originally Posted by lostforawhile View Post
    I don't think they make the silver anymore, the Nappa gold is Wix, thats the one to get.
    QFT wix is awesome stuff, and NAPA gold is usually the easiest way to source them for me. we don't have any local wix dealers that i know of.
    There are rules here!

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