t6.1 strange rattle/noise when engine underload

[itsmedee96]

2021 t6.1 150bhp

got a strange noise on my t6.1, seems to be coming from the drivers side.. iv changed the bottom crank pulley, new alternator, new aux tensioner and new ac compressor.. and the noise is still there! iv taken the aux belt off and put the engine underload and you cant hear the noise.. any thoughts? ill try and upload a video…

 

[vwjack]

Did you ever get to the bottom of it @itsmedee96 ?

 

[itsmedee96]

put the old crank pulley back on and another alternator with the corrent amp output and its stopped you got the noise on yours? @vwjack