Clunking brake
Discussion
Pads could be loose, as they may have been ground down to fit when new.
The pads sit on little steel plates inside the alloy caliper. Corrision between plates and caliper over time means that the plates can distort leaving a less-than-new-pad-sized gap further from the disk, where the pad only sat when new. Make sense?
Anyway, bottom line is, to get new [thicker] pads into the now smaller gap in the caliper, its common to have to grind down the pad. This makes it a nice snug fit when new, but as the pad wears and it moves into the still standard-sized gap, it now starts to rattle about a bit.
Alternatively, it could just be the wheel about to fall off
WB
The pads sit on little steel plates inside the alloy caliper. Corrision between plates and caliper over time means that the plates can distort leaving a less-than-new-pad-sized gap further from the disk, where the pad only sat when new. Make sense?
Anyway, bottom line is, to get new [thicker] pads into the now smaller gap in the caliper, its common to have to grind down the pad. This makes it a nice snug fit when new, but as the pad wears and it moves into the still standard-sized gap, it now starts to rattle about a bit.
Alternatively, it could just be the wheel about to fall off
WB
octane junkie said: Thanks Danny - probably better just to replace them, huh?
Its quite possible that further replacement won't solve the problem. I spent quite a while trying to eliminate rattle in mine including replacing new pads. Solution was to remove the copper slip and pop some silkaflex on the back of the pads i.e. Bond it.
Worked a treat.
>> Edited by monkeyjunky on Monday 26th May 19:48
I've just spoken to the Dealer. They suggested "they all do that sir". I've been told as they are racing brakes they have floating calipers and the clunking noise is produced by the slight movement in the calipers before they engage the disc.
Judging by some of your replies I feel there is an element of truth in this. I'm just not sure whether the noise is louder than expected.
Judging by some of your replies I feel there is an element of truth in this. I'm just not sure whether the noise is louder than expected.
arcbeer said: I've just spoken to the Dealer. They suggested "they all do that sir". I've been told as they are racing brakes they have floating calipers and the clunking noise is produced by the slight movement in the calipers before they engage the disc.
Judging by some of your replies I feel there is an element of truth in this. I'm just not sure whether the noise is louder than expected.
Hmmm. Mine did that after getting new disks & pads, and Castle fixed it immediately. So I'm not sure about the TADTS answer here.
arcbeer said: I've just spoken to the Dealer. They suggested "they all do that sir". I've been told as they are racing brakes they have floating calipers and the clunking noise is produced by the slight movement in the calipers before they engage the disc.
Floating calipers my a
se. They're bolted to the hub carriers. The pads may well 'float' in the calipers due to wear, and they may all do that, but it ain't designed that way. WB
As far as floating pads is concerned, your problem could be similar to mine. I have just had new discs & pads on the front and the offside sounded like a horse clip-clopping along the road at low speeds. As with most cars, my early cerb is fitted with mousetrap style oversprings that clip to the center pin of the calipers and are supposed to hold the pads static when not under load. However the steel has corroded and hence the spring force has reduced. I bent them to increase the load, solving the noise temporarily, but dobbin came back 
. I would suggest you check yours (they can even fall out, or can be left out at a service, so you may not even know they are supposed to be there).
I have acquired a later set to fit, which are more like a flat sprung pressure plate, but haven't had a chance so far. Might suit you sir.
Cheers
Jerry
. I would suggest you check yours (they can even fall out, or can be left out at a service, so you may not even know they are supposed to be there). I have acquired a later set to fit, which are more like a flat sprung pressure plate, but haven't had a chance so far. Might suit you sir.
Cheers
Jerry
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