Audi S6, pinging/detonation

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  • domas
    S2Forum Addict
    • Oct 2014
    • 307
    • Country: Lithuania
    #46
    IMHO this failure is not very common and I would just get a good used WG. Maybe I would drop in a new diaphragm.

    But let the others chime in - maybe I wasn't aware that this is actually happening more often.

      Comment

      • prj
        S2Forum Zealot
        • Mar 2010
        • 6308
        • Country: Estonia
        #47
        There is supposed to be lots of play on a cold wastegate, if there was no play it would seize shut the moment it heats up.
        http://tuner.ee - http://www.facebook.com/tuner.ee

          Comment

          • KTM-Mike
            S2Forum Buff
            • Nov 2013
            • 27
            • Country: Sweden
            #48
            Originally posted by prj
            There is supposed to be lots of play on a cold wastegate, if there was no play it would seize shut the moment it heats up.
            Ok. But how much is "lots of play" ?

            WG never rattle at 100% open (above 1,4-1,5 bar abs.pressure)
            .......or 100% closed (fully against the valveseat).

            This is with ONLY hose between compessor house directly to WG.

            N75-valve completely removed.

            /M

              Comment

              • KTM-Mike
                S2Forum Buff
                • Nov 2013
                • 27
                • Country: Sweden
                #49
                Changed to another used WG...(23000km)

                Noise is there, but not so loud.

                /M

                  Comment

                  • Andrew Conway
                    S2Forum Hobbyist
                    • Mar 2007
                    • 23
                    • Country: United Kingdom
                    #50
                    Hi Mike

                    Do you have anymore info? Have you been able to identify where the noise is coming from yet?

                    Regards

                    Andrew

                      Comment

                      • KTM-Mike
                        S2Forum Buff
                        • Nov 2013
                        • 27
                        • Country: Sweden
                        #51
                        /Andrew

                        It's the wastegate making the sound.

                        Still there, guess it's supposed to rattle...

                        /M

                          Comment

                          • Andrew Conway
                            S2Forum Hobbyist
                            • Mar 2007
                            • 23
                            • Country: United Kingdom
                            #52
                            Thanks Mike.

                            I'll be soon starting to work on my soon so i'll keep you informed if I find anything different.

                            cheers

                              Comment

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