fendervg 32 Posted August 26, 2011 The C has developed a slight speed dependent whine - not too loud but definitely noticeable at higher speeds. Things that were changed recently were rear wheel bearings, new pads and discs all round and gearbox oil - any ideas if these could be the cause ? The bearings are tight and the gearbox was filled with 2L of MT-90. Quote Share this post Link to post Share on other sites
Rob_B 0 Posted August 26, 2011 does it sound like wheel bearing noise? goes away when turning left or right? Genuine bearings done up properly, not too tight? Bearings pressed in properly or with a hammer? Quote Share this post Link to post Share on other sites
fendervg 32 Posted August 26, 2011 I have a press - so the bearings were put in properly - doesn't go when turning - and you can't hear it at low speed. They are VAG bearings - wouldn't use any other ones. Quote Share this post Link to post Share on other sites
Rob_B 0 Posted August 26, 2011 bearing noise typically occurs between 40 and 60 mph in my experience. tyre noise possibly? Quote Share this post Link to post Share on other sites
fendervg 32 Posted August 26, 2011 IOk - I'll see if I need to back them off a bit - when I fitted them I did the usual checks to see if I could move the washer with a screw driver etc. Quote Share this post Link to post Share on other sites
RW1 0 Posted August 26, 2011 I'd put that noise down to a bearing being over tightened and when it heats up at speed, its tightens slightly more. . Quote Share this post Link to post Share on other sites
Rob_B 0 Posted August 26, 2011 IOk - I'll see if I need to back them off a bit - when I fitted them I did the usual checks to see if I could move the washer with a screw driver etc. thats the way I do it, but you need to make sure the bearing hasn't undone itself a bit either. I would say that they do need checking again after running them for a few miles. Quote Share this post Link to post Share on other sites
fendervg 32 Posted November 25, 2011 Sorted this - it turned out to be one of the rear tyres - changing all four to new resulted in a lovely smooth sound accompanied by six pot growl again. Quote Share this post Link to post Share on other sites