Yes, glad it found a home, if nothing else hoped to save other folks some money. Ah well.
Not sure, not sure if hard bit in the pads (or as you say, a hard bit of something else made it's way in the gap!) or flaws in the disk itself??looking at the brake pictures, The scoring ,i always thought was caused by grit , but I'm thinking now maybe an imperfection in the disc metal it self ?
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Thinking outside of the box is better than sitting in a dark one.
FromDeep, Sharp Grooves (Scoring)
This is where brake discs scratches become a serious concern. If you see one or more deep, distinct grooves that you can easily catch your fingernail on, this is a sign of a significant problem. This condition, known as scoring, indicates that something hard is digging into your rotor.
The most common cause of deep scoring is a brake pad that has been completely worn down to the metal backing plate. The steel of the backing plate grinds directly into the iron of the rotor, carving a deep groove. A less common cause is a small rock or piece of metal debris that has become trapped between the pad and the rotor.
Agree Mick, it's possible to make a mess of it. I've usually removed negligible material from the disk surface (unlike any lip which does get taken down entirely) and have got away with it in the past.mickthemaverick wrote: 25 Jan 2026, 14:19 I wouldn't recommend cleaning a brake disc with a flap disc, very difficult to avoid high or low spots. Spin the brake disc and use a flat abrasive across the face to keep it even. I built a home device some time ago for that purpose shown here, which actually spins a hub I fit the discs onto, and it works very well!!
Not a bad idea, but what about the back of the disk!mickthemaverick wrote: 25 Jan 2026, 14:28 That looks like a get it up on stands, engage second gear and run the engine at tickover to spin the discs while holding your abrasive, file, paper, pad etc still against it!! Hold it with grips to keep your fingers away from the spinning disc!!
£38.14-£5.72 = £32.422x Brake Discs Pair Solid Rear 268mm 104508 Febi Set 1609582880 3642786 Quality
£26.67-£4.00 = £22.67Brake Pads Set fits PEUGEOT 308 Mk2 1.2 Front 13 to 21 1609898580 1612412380 New
Thinking outside of the box is better than sitting in a dark one. Good to know thank you.Huskyxantia wrote: 25 Jan 2026, 20:52 If the sliders are coated with a black plastic stuff , keep your eye on it as that tends to melt and make the brake pads stick , as I found out when I cleaned my 308cc rear brakes , I cleaned it all off , brakes no longer stick, might be worth pulling it off before your fit them in place.
If you file off the lip on both sides at one point on the disc you might be able to get your micrometer on. Likely the minimum thickness is 2 mm less than new so could be 26 mm and a 25 mm micrometer might just be able to measure that but be slightly more than the 25 mm marking.MattBLancs wrote: 25 Jan 2026, 19:53 Having done a bit of digging:
Front measured diameter 305, actually 304mm
Thickness is apparently 28mm (which is why I couldn't get my 0-25mm micrometer over it, as well as the caliper and brake dust shield getting in the way.
Yep, I did wind the micrometer a fair bit beyond it's range (1.5 turns, so 26.5 mm) but not going on. As rust is bigger than steel, the outer lip has likely gained a bit of thickness, so I will try again when I do the pad replacement and have ground the disk lips off - but am hoping at present it means I'm nearer the original 28 mm thickness!PaulC5 wrote: 26 Jan 2026, 16:04If you file off the lip on both sides at one point on the disc you might be able to get your micrometer on. Likely the minimum thickness is 2 mm less than new so could be 26 mm and a 25 mm micrometer might just be able to measure that but be slightly more than the 25 mm marking.MattBLancs wrote: 25 Jan 2026, 19:53 Having done a bit of digging:
Front measured diameter 305, actually 304mm
Thickness is apparently 28mm (which is why I couldn't get my 0-25mm micrometer over it, as well as the caliper and brake dust shield getting in the way.
Yep, serial copper greaser here too. Actually I will try to remember the "ceramic brake grease" I have got for this exact application!The black plastic stuff on the back of pads wears through so when cleaning them up I remove it at the contact areas and use a bit of copper grease. If not removed the piston/caliper might not sit flat against the pad and also could make the brakes a bit spongy as it is compressed.
