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    Adjustable shocks are uneven

    Can anyone chime in on this?
    Bought a set of new koni yellows with adjustable rebound. One side needs 1.5 turns and the other side only needs 0.25 turn from full soft. This makes them rebound almost identically. Seems wrong but should i care as long as they are at same rebound rate?

    #2
    What do you mean by "rebound almost identically?"

    How quickly the shaft extends after compression is not a measurement of rebound.
    DD: /// 2011.5 Jerez/bamboo E90 M3 · DCT · Slicktop · Instagram
    /// 2004 Silvergrey M3 · Coupe · 6spd · Slicktop · zero options
    More info: https://nam3forum.com/forums/forum/m...os-supersprint

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      #3
      Originally posted by Tbonem3 View Post
      What do you mean by "rebound almost identically?"

      How quickly the shaft extends after compression is not a measurement of rebound.
      Thats a great point, I was not aware of that. Is there a laymans method of checking the rebound rate?

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        #4
        Koni tests their products for uniformity.
        So unless you get a rare duff item, go by the installation instructions.
        If you install them using your current callibration method, the positive will be that you become familiar with a "failed" damper behavior on one corner.
        However your's is a good idea to exercise the dampers before installation.
        In the past, Other damper manufacturers recommended execising new hydraulic dampers prior to installation.

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          #5
          FBloggs Thanks for the input. Relieved to hear that my shocks are likely just fine.

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            #6
            Compress each one and turn your 5mm allen key counter clockwise until you hit the stop. You'll be rechecking that the adjusting mechanism works properly on both dampers.
            Then exercise each one several times to minimize the aeration from pre sale storage. This should not be a problem as they are supposed to be pressurised.
            when you compress them, is the resistance about the same for both?
            Then stiffen them and check for uniformity in behavior when you test compress them again.
            If not the same, then confidence is low for the "soft" one.
            Check the "soft" damper shaft for pits, or damage to the chrome shaft. Also check them for any oiliness...should be dry.
            If you decide to install them, a failing/leaking Koni sport allows the affected corner to drop lower than the other, good side. If they are rears, the car will feel a little odd if the rear axle encounters a dip in the road that is as wide as the wheel track.

            I had a damaged rear koni sport, about a month ago.
            It had a small pencil tip sized damage to the shaft. The seal was quickly torn within a couple of miles, and since I knew it was damaged, was watchful for the symptoms in the ride.

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              #7
              I dont see any signs of damage to the body nor any oil leakage. The only thing ive noticed is the compression pressure definitely "seems" less on one rear shock (goes down easier). It also rebounds faster than the other shock at the same adjustment level. That was my main concern since it seemed like it was extra "loose"

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