Grinding noise - brakes?

D

Darren C

Admin Team
I have suddenly inherited a grinding noise from what appears to be the nsf wheel. (I appreciate sound travels, so this is a best guess).

It isn't noticeable at speed, nor is it noticeable at low speed constantly. It appears to come and go. With the noise comes slight resistance momentarily, before all is well again. It sounds like the brakes aren't disengaging or a stone is caught behind the discs and between the shield.

There is nothing obvious, (from a very cursory visual), and all seems fine under braking. The discs, (whilst slightly corroding around the outer edge) are in perfect condition, with no lips or signs of warping. The pads must be around 70% at least given my driving style and despite being original equipment.

There appears to be no broken springs, (I have the upgraded Weitec's so I should hope not yet), and the under-shield isn''t hanging loose from my recent service either.

I intend to remove the wheels tomorrow and have a good look; but does anyone have any thoughts/ideas.

Cheers,

Darren
 
hi Darren not sure this it it but i had this happen on a 309 pug a few years ago---a drive shaft gaiter came off, this threw the grease out and made an awfully sound. i drove it home after pulling into pub car park(why not)on pulling in on full lock it must have picked up some grease and went quiet. on getting home (20 mile trip) i jacked it up re packed it with C.V grease replaced broken tie wrap and it never made made a sound ever again.
so it maybe worth checking all 4 drive shaft gaiters. good luck mikee
 
a2sumo said:
hi Darren not sure this it it but i had this happen on a 309 pug a few years ago---a drive shaft gaiter came off, this threw the grease out and made an awfully sound. i drove it home after pulling into pub car park(why not)on pulling in on full lock it must have picked up some grease and went quiet. on getting home (20 mile trip) i jacked it up re packed it with C.V grease replaced broken tie wrap and it never made made a sound ever again.
so it maybe worth checking all 4 drive shaft gaiters. good luck mikee
Click to expand...

Cheers buddy,

I will have a good scout around first thing; though being a mechanical layman, unless it is an obvious failure, I am unlikely to spot something minor amiss.

Cheers,

Darren
 
Well I had all four wheels off yesterday in the end and the rear drum outer casing too and couldn't find anything obvious anywhere.

I tugged at the driveshaft, anti-roll bar, checked for broken springs on the suspension and within the rear drum itself, checked for play of the wheel in case of bearing failure, undertook rotational tests etc... - nothing.

Prior to undertaking the examination, I drove on and off the drive, (inclusive of a small run), several times and had the symptoms. After more thought and evaluation, I narrowed it down to the nsr drum, although when I managed to get an assistant to check the sound source - of course there was no fault.

With an assistant present I couldn't recreate anything other than two loud clunks as I drove off - one time only out of many pull a way's.

I am of the layman opinion that it could have been a sticking rear drum brake, (which might explain the two clunks as both pistons released). All is currently well, but for how long...

Cheers,

Darren
 
I had this noise when I had my front discs and pads changed and the noise comes and goes, although less frequently than just after I'd had them done.

Put a post on here and I think it was Skipton that told me it was a common issue. Not sure how to prevent it. Perhaps by thoroughly cleaning the area where the disc goes before fitting or using grease on the back of pads. Don't know for sure but I think it is nothing to worry about.

If you search the forums you might find some info on it.
 
Could be. I changed by rear shoes very recently and had a noise similar to your description, seemingly emittting from the NS-Rear drum. I have since checked it out and found no problems. I did apply copper grease to the moving parts before assembly and I'm sure that they are assembled correctly and securely. Noise has not been around for a while now.

Hope you get it sorted out.
 
thespringfield said:
Could be. I changed by rear shoes very recently and had a noise similar to your description, seemingly emittting from the NS-Rear drum. I have since checked it out and found no problems. I did apply copper grease to the moving parts before assembly and I'm sure that they are assembled correctly and securely. Noise has not been around for a while now.

Hope you get it sorted out.
Click to expand...

Cheers buddy.

Having covered a few miles over the course of the weekend, all is still well. I am still of the opinion that a sticking nsr drum was the root cause. Hopefully a "one" off episode, that won't be repeating itself.

Regards,

Darren
 
You must log in or register to reply here.
Back
Top