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Clunk when accelerating

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  • Clunk when accelerating

    Thought I'd start a new thread so that if this happens to others in the future then it can be easily searchable.I've got a clunk when I accelerate more so in 1st and 2nd and it's also now appearing when I compression decelerate also. It's also making a clunk sound when I go over bumps like speed bumps or up driveways etc, and this has occurred more since I got the lower control arms installed a few weeks back. Note that the original clunk (when in 1st and 2nd) appeared before I got the lower control arms installed.

    Anyway, took it to the dealer today. They road tested it and agreed it's making unusual clunking noises (yay for me, at least they acknowledge it now). They checked the engine mounts and gear box mounts. All fine. So they're not sure what's clunking? Have to take it back Thurs week and leave it with them for the day so they can do a more thorough inspection.

    Will keep you guys posted.

    A google search has identified similar issues with other Skodas/VWs but no one has really seemed to find a common cause of the clunking.

    BTW - It's a manual vRS petrol wagon with less than 20k's on the clock.

  • #2
    something isn't greased up enough.

    something isn't tight enough.

    dogbone mount is loose, or the bush you (may have) put in it isn't greased up enough.

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    • #3
      Originally posted by zei20t View Post
      dogbone mount is loose, or the bush you (may have) put in it isn't greased up enough.
      Cheers. This looks to also be located slightly to the left of the centre of the car also isn't it as the clunking appears to be coming more so from the lefthand side of centre, if that makes sense.

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      • #4
        Dual mass flywheel my friend - my Golf R does it as well and its normal.
        2017 Ford Fiesta ST the go kart

        2015 Audi SQ5 bi-turbo V6 TDI family hauler

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        • #5
          is that for real?

          I also get a clunk, but its only started happening since installing the dogbone insert.

          ive had DM flywheels before and they have been quiet as!

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          • #6
            Originally posted by Lucas_R View Post
            Dual mass flywheel my friend - my Golf R does it as well and its normal.
            There's no way in hell I'm accepting this clunk as normal. It wasn't there when I bought the car so why should it be there now.

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            • #7
              I would suspect the subframe but also need to check the engine mounts

              It happened to my Mazda3
              The drive shaft splines were suck and from time to time they moved with a clunk
              Greasing the spline solved the problem
              2012.1 Skoda Octavia VRS DSG Wagon - Carbonio cold air intake and pipe - HPA Motorsports BBK 355mm rotors 6 pot calipers
              APR Stage II ECU - APR 3" exhaust down pipe & high flow catalyst
              APR/HP Roll bars - Eibach springs and Bilstien shocks
              Supaloy lower control arms - Enkei 18*8 Wheels

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              • #8
                next time im doing mods, ill start greasing things up. might replace the dogbone insert with a full mount too

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                • #9
                  That rubber dog bone mount in the sub frame is actually two rubber mounts/bushes - an upper and lower
                  They are not very challenging to remove/replace
                  2012.1 Skoda Octavia VRS DSG Wagon - Carbonio cold air intake and pipe - HPA Motorsports BBK 355mm rotors 6 pot calipers
                  APR Stage II ECU - APR 3" exhaust down pipe & high flow catalyst
                  APR/HP Roll bars - Eibach springs and Bilstien shocks
                  Supaloy lower control arms - Enkei 18*8 Wheels

                  Comment


                  • #10
                    Originally posted by Martin View Post
                    I would suspect the subframe but also need to check the engine mounts
                    Thanks Martin. The dealer reckons they've already checked the engine mounts and all were good. Will ask them next Thursday to check the subframe and the dogbone mount.

                    Not sure if they can easily check the DMF?

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                    • #11
                      not without removing the transmission

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                      • #12
                        Well well. Took the car into Bryan Byrt Skoda today again so they can have the car for the whole day to investigate the clunking. They just rang me and told me they won't be looking at the car until I return it to stock (replace supaloy control arms back to stock) as they said I have modified the car.

                        I politely (whilst biting my tongue) told them that as noted on my 15k service sheet, the clunking noise was evident pre lower control arms replacement, hence it is not being caused by the lower control arms. Don't dispute that the lower control arms my be accentuating the noise, but it was clearly there pre-control arms replacement and has been getting worse (even pre-control arms replacement).

                        Skoda are clearly trying to obsolve themselves of their responsibilities here. Firstly, they need to find the fault and then determine that the lower control arms are causing this fault, but as I've said above, this fault was evident pre-lower control arms replacement. NOT A VERY HAPPY CAMPER AT ALL!!!

                        They won't even find the fault!!!

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                        • #13
                          Apparently I had faulty lower control arms. Apparently was a problem with the poly bushes. They kept squeezing out the grease (or so the installers told me anyway).

                          Touch wood problem is now fixed.

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                          • #14
                            faulty supaloy arms? or the factory ones?

                            I have factory ones and I get the clunk

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                            • #15
                              I had exactly the same noise and 2 VW dealers could not diagnose it properly while my car was under warranty.

                              Not only that but the first dealer charged me a hefty inspection fee since the car had been modified (Bilstein cup kit) and along with the BS diagnosis (worn CV inner joint), the service desk guy gave me a ridiculous story about the problem being a known weakness for my car and the long term solution being aftermarket CV BRASS joints.

                              Sounds like Skoda dealers aren't much better.
                              Resident grumpy old fart
                              VW - Metallic Paint, Radial Tyres, Laminated Windscreen, Electric Windows, VW Alloy Wheels, Variable Geometry Exhaust Driven Supercharger, Direct Unit Fuel Injection, Adiabatic Ignition, MacPherson Struts front, Torsion Beam rear, Coil Springs, Hydraulic Dampers, Front Anti-Roll Bar, Disc Brakes, Bosch ECU, ABS

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