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Why would my rotors be wearing like this? The pads, rotors, calipers and hardware are all new. The 18mm bracket bolts are torqued to 85ft.lbs. and the caliper pins are torqued to 20ft.lbs. and the retainers are all fully seated. This is maybe 50 -100 miles into break in and I did follow recommended break in procedures. Rears look fine btw. Also has a rhythmic scrape as I drive.
Contaminated pads? Try doing a pad break-in. Drive to 45mph and brake hard a few times until you start smelling the brakes.
I did the whole bedding procedure. Gradually warming them, slow and light braking followed by more moderate speeds and moderate braking. They feel great but it worries me they would wear like this possibly foreshadowing a more serious issue to come.
W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
No need to worry all is well and going very good.
What you see is the remaining silver paint on the rotor surface fyi the rotor is entirely painted when new and when you start
driving and bedding in the paint is the first to wear off and what you are seeing is brakes worn in by about 70%.
As you use the car more the pads will further bed in and wear the remaining paint off.
The discs is made and machined very flat and the pads have a rough texture which smooths off with wear, just drive normal don't try and heat them up to wear them in quicker.
So I have the car on the lift right now and I've been trying to determine an awful clunk/rattle I've been having for a while. All bushings are in good shape, shocks and mounting accessories are all new within a year. SBL's are torqued and there is no play but I did just notice if I push on the caliper inwards toward the hub there is a lot of slop. The retainer clip is new and puts it back into position but I'm certain that this is causing the awful clunking and banging when I drive over uneven surfaces. I noticed yesterday the noise is reduced if I can apply the brakes right before it happens, in essence locking them in place. Wtf?! What do I do about that? The bolts are all torqued to spec.
So I have the car on the lift right now and I've been trying to determine an awful clunk/rattle I've been having for a while. All bushings are in good shape, shocks and mounting accessories are all new within a year. SBL's are torqued and there is no play but I did just notice if I push on the caliper inwards toward the hub there is a lot of slop. The retainer clip is new and puts it back into position but I'm certain that this is causing the awful clunking and banging when I drive over uneven surfaces. I noticed yesterday the noise is reduced if I can apply the brakes right before it happens, in essence locking them in place. Wtf?! What do I do about that? The bolts are all torqued to spec.
The outside pad comes with double-sided tape. Sometimes it is not enough so I always put a bit of high temp silicon to make sure the pads stay on the caliper. As for the inside pad, it goes in with that metal spring clip. That clip sometimes needs to be bent out so that it fits tighter and holds inside the caliper piston. My Akebono pads arrived with those spring clips a bit too small resulting in a loose-fitting pad.
Here's a video of exactly what can happen (Extreme case)
The outside pad comes with double-sided tape. Sometimes it is not enough so I always put a bit of high temp silicon to make sure the pads stay on the caliper. As for the inside pad, it goes in with that metal spring clip. That clip sometimes needs to be bent out so that it fits tighter and holds inside the caliper piston. My Akebono pads arrived with those spring clips a bit too small resulting in a loose-fitting pad.
Check out this thread I started. https://mbworld.org/forums/showthrea...8&goto=newpost
You will see the issue I'm having. My pads sit nice and tight and I use the green permatex when assembling any metal on metal parts.
04-13-2021, 08:39 PM
