6.4L K&N Filters void the warranty??

Discussion in 'Challenger SRT8 Engine & Performance Modifications' started by SRTSammy, Nov 30, 2011.

  1. SRTSammy

    SRTSammy Full Access Member

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    I have read that before, but forgot where to look for it.

    Thanks Tom for bringing that to light!!!
     
  2. Bigredmariner

    Bigredmariner Active Member

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    BooYaw, good info Tom.
     
  3. 1analguy

    1analguy Member

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    The problem arises when you have to pay to take the dealership to court in order to force their compliance...

    As far as oiled-fabric filters in general, they do have at least half of an argument. K&Ns can foul sensors with oil. The only one I ever bought did this to me (right out of the box), and the cure was expensive. Additionally, oiled-fabric filters will pass more dirt than dry paper filters. There's no free lunch in Newton's universe...if a K&N of a given size passes more air than the same-sized paper element, then it's passing more dirt, too. Basically, it's just an oily rag with holes in it. The difference in dirt may not be great, but it gives the dealer legal ammunition nonetheless. They can argue that the sensors won't like the oil and the rest of the engine won't like the added dirt...and then you'll be stuck trying to prove them wrong. It could get expensive really quick...
     
  4. heminit

    heminit Full Access Member

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    I have used the same dealer installed wet K&N air filter on my 2003 Ram since new. Cleaned and re-oiled more than a couple of times. Never a failure of any sensor or any build-up of oil. IMO, the PCV system passes more oil through the intake than the properly oiled K&N.
     
  5. SRT-Tom

    SRT-Tom Well-Known Member Staff Member Super Moderator Article Writer

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    I think some people experience problems with K & N filters when they clean and re-oil them. if not done correctly, an excessively oiled filter can foul a MAP sensor (if so equipped).

    As for the filtration, it's obvious that it will allow more smaller particles to pass through than a paper filter. That is the trade-off for a less restrictive filter.

    I have the MOPAR/AEM CAI on my SRT. It is a dry filter (washable) and I think that it is a good compromise between the OEM paper filter and the K & N.
     

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    Last edited: Jan 30, 2012
  6. 1analguy

    1analguy Member

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    The PCV system doesn't pass oil over the sensors. It dumps downstream from them. An over-oiled K&N exposes the sensors themselves to oil mist.

    I experienced expensive problems with the K&N that I bought, and they occurred when the filter was brand new and factory fresh...right out of the box. The filter was in the garbage long before I ever had a chance to clean or re-oil it.

    Oddly, I have never, in over 40 years of driving and wrenching, had any kind of a problem with a paper-element filter. Guess what I use now...
     
  7. brandy16

    brandy16 Member

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    The dealer is full of it. The MOPAR cai was a wet filter I don't know if they still are and the mopar one was made by K&N for mopar blue instead of red
     
  8. brandy16

    brandy16 Member

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    The K&N filter will not foul a sensor if it is not over oiled. Follow the instructions on cleaning and oiling. Also you have a hose that comes off the oil filler and gos to the air intake you are pulling air with oil in it from the crank case that is the stock set up. So your getting some oil in the intake air already. Take a look at your throttle body there is an oily build up on it even with the stock filter. So FIND ANOTHER DEALER.
     
  9. From RUSSIA

    From RUSSIA Member

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    What are the differences between the Mopar filter and K & N? I know that K & N should be washed (clean) the extent of contamination and cause Shrove impregnation. Mopar filter (blue) just need to be cleaned?
     
  10. SRT-Tom

    SRT-Tom Well-Known Member Staff Member Super Moderator Article Writer

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    The K & N filter uses oil to trap dirt and dust particles. After it gets dirty, it has to be cleaned with a special K & N solution and re-oiled.

    To avoid all of this mess, I prefer washable filters that do not need to be oiled. One washable filter is the MOPAR. It is made by AEM. This is what I have on my SRT.

    You should know that these "cold air intakes" look good and make the engine sound better, but will only give you a maximum of 5 hp, if any. That's because the stock air boxes are pretty efficient, especially on the SRT model.

    Here is a photo of my MOPAR CAI.
     

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