Brakes a bit graunchy/lurchy just as you stop.
Discussion
That sort of light braking at low speed can polish up the discs and pads quite a bit and cause low friction, which then can cause all sorts of NVH issues, usually squeal, under whatever conditions are the trigger for that particular vehicle. Could be the cold weather in this case.
Try giving the brakes a good pasting and see if it disappears.
Also might be worth checking that everything is as it should be around the brakes, for example pad sticky backings have been unpeeled so the pads stick to the pistons, pistons move freely, sliders move freely, everything is torqued up to the right spec, disc and wheel mounting faces are clean and free of any debris.
Next option is that the pads are worn and have deteriorated, introducing the issue or the wear has removed any edge chamfers they had. If the pads are supposed to be chamfered then chances are the chamfer was added to cure an issue, perhaps even the issue you have.
The final alternative is that something in the suspension has gone out of spec and has introduced a sensitivity, probably the bushes!
Try giving the brakes a good pasting and see if it disappears.
Also might be worth checking that everything is as it should be around the brakes, for example pad sticky backings have been unpeeled so the pads stick to the pistons, pistons move freely, sliders move freely, everything is torqued up to the right spec, disc and wheel mounting faces are clean and free of any debris.
Next option is that the pads are worn and have deteriorated, introducing the issue or the wear has removed any edge chamfers they had. If the pads are supposed to be chamfered then chances are the chamfer was added to cure an issue, perhaps even the issue you have.
The final alternative is that something in the suspension has gone out of spec and has introduced a sensitivity, probably the bushes!
Edited by The Wookie on Tuesday 9th December 08:49
Thanks Wookie - sounds like a little root around over the Xmas break (ha!) is in order. I am quite a light braker (17mpg makes you tight!) and there is a lot of engine braking on offer so I think Plan A (a quick 'amble') sounds good as a first try. Remember having to do that with a Scooby on some temporary harsh pads once and it did fix the issue. Thanks for the advice. KF
No worries, keep us updated!
This sort of thing is often brought about by a fluke of driving style.
We had a customer complaint about a squeal on a particular type of vehicle. I had driven our one for thousands of miles of varied driving, and in trying to get the damn thing to squeal I put another few thousand miles of light braking in with no result.
Gave it to one of my colleagues and he had it going within 2 days.
Took it back and I still couldn't get it to do it. Looked through some telemetry from the data logging kit we had fitted, copied his braking style and voila! Barking dogs, glowering old people and crying children were abound.
This sort of thing is often brought about by a fluke of driving style.
We had a customer complaint about a squeal on a particular type of vehicle. I had driven our one for thousands of miles of varied driving, and in trying to get the damn thing to squeal I put another few thousand miles of light braking in with no result.
Gave it to one of my colleagues and he had it going within 2 days.
Took it back and I still couldn't get it to do it. Looked through some telemetry from the data logging kit we had fitted, copied his braking style and voila! Barking dogs, glowering old people and crying children were abound.
Well its cured - all that was needed was to give it some beans! I'm normally really gentle on the brakes and lift off well in advance to slow down etc, so actually giving the brakes a bit of a workout (as suggested by Wokkie) when the opportunity arose has cured the issue. Cheers :-)
Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff