Rotational rubbing noise hard to identify
Posted: 23 Feb 2011, 10:42
Dear all,
just the other day i noticed a low volume but noticeable noise that starts up pretty much s soon as the van is rolling, its fairly dull like asomething is running/grinding slightly. It increased with engine speed but in relation to the wheels turning i.e. it does not increase speed when i change down which tells me its unlikely to be gearbox noise.
Have had recent new bearings and disks on the front and have checked that these have normal play. If i open drivers side (n/S) window there is no increase and it does not sound like n/s bearing.
Underneath the rear there is no laternal play in the cv joints if i jack up each wheel, all rubber boots are ok on cv joints.
Just in case a CV was 'dry' and knowcking a bit i put in a bit of spray grease under the boot to see if it would shut the noise as a temporary measure- this did not work (I know the spray grease is very thin.)
The rear wheels have some in an out movement if you pull them towars you but no 12 and 6o clock or 3 and 9 o clock- not sure what else could make this sort of noise?
NB there is a bit of rubbing from the brakes but nothing to note. Is there any way to isolate different bits and what are the definitive checks. Thanks a lot, going on trip soon and I don't ant to chuck money buying new CV's and rear bearings if I've not really understood how to diagnose them! cheers, Tim
just the other day i noticed a low volume but noticeable noise that starts up pretty much s soon as the van is rolling, its fairly dull like asomething is running/grinding slightly. It increased with engine speed but in relation to the wheels turning i.e. it does not increase speed when i change down which tells me its unlikely to be gearbox noise.
Have had recent new bearings and disks on the front and have checked that these have normal play. If i open drivers side (n/S) window there is no increase and it does not sound like n/s bearing.
Underneath the rear there is no laternal play in the cv joints if i jack up each wheel, all rubber boots are ok on cv joints.
Just in case a CV was 'dry' and knowcking a bit i put in a bit of spray grease under the boot to see if it would shut the noise as a temporary measure- this did not work (I know the spray grease is very thin.)
The rear wheels have some in an out movement if you pull them towars you but no 12 and 6o clock or 3 and 9 o clock- not sure what else could make this sort of noise?
NB there is a bit of rubbing from the brakes but nothing to note. Is there any way to isolate different bits and what are the definitive checks. Thanks a lot, going on trip soon and I don't ant to chuck money buying new CV's and rear bearings if I've not really understood how to diagnose them! cheers, Tim