Any decent mechanic would have spotted that there are wear ridges on the discs (rotors). If the discs are safely within the minimum thickness levels then the ridges can be ground off with a brake lathe, or the pads can have their edges chamfered slightly to allow clearance for the ridges, although care has to be taken as it reduces the pad contact area and so can reduce braking performance. You had some grinding done, but it's clearly been insufficient; there are ridges on the inner and outer disc faces and also towards the hub as well as the obvious outer edge ridges. A competent mechanic would have checked the fault was cured before getting the customer to pay, and if that hadn't fixed it would have looked more closely for other causes. Competent mechanics understand that there are no half-measures with braking systems; they either work fully within specifications or they don't.
But ultimately, brake discs/rotors have typically required replacement with every alternate set of front pads, and if the car has rear discs they tend to need changing with every third or fourth pad change. Disc changing is now so routine that it takes little more additional time than replacing the pads alone, and on many cars fitting new discs costs less than the labour charges involved in refacing them on a lathe.
Rotors. Not "roter." The description as to "my car" is completely inadequate. Cars are identified with data points in this sequence: year, brand or make, model name and whatever else you wish to disclose such as miles, type of transmission, etc. A 2014 Acura TL is an example. Brakes. How old are you anyway? Do you know how brakes work? They rub, the must have friction between the brad pads and the rotors to change motion into heat therefore slowing down the velocity of the vehicle. Please look online for everything is explained rather well. If you wish to have someone else examine the brakes and ride or drive the car while you explain the noise, then do that. Asking here? Not exactly the way to address mechanical issues with cars. Please note that questions need a question mark and quotes need quotation marks. This is the sentence. ( I said, "Why is it grinding then?"). That is correct. There is no such term as "n." in English. "n" is one letter. You randomly capitalized the word "Rust." Not correct. The last sentence is very confusing because it is incorrect. Makes no sense at all.
Automobile brake rotors are made from bare steel. They DO collect rust on a routine basis, and when you apply your brakes, the brake pads rub the rust off the disc. You MAY hear a slight scraping or squealing sound when this happens. That's normal.
If you are hearing a constant "grinding" sound, then you have other problems. It could be a bad wheel bearing or CV joint.
If the noise only happens while applying the brakes and the pads are still thick enough you have cheap brake pads that probably were slapped on with out replacing the rotors or machining them.
Grinned it down? What in the world does that mean? As for the rust, driving it a little should take the rust off. The other alternative would to be to grease the rotors but I don't recommend it. You might be killed in an accident while the grease was being burned off.
yeh
I took my car to the shop yesterday to have the brakes looked at. They said there fine. You still have 3/4 pad left. I said why is it grinding then. They took the pad off n was some Rust on the roter. They grinned that down. Took it for a ride and it still did it. Said I may need new roters all together?
