new rotors - United Bimmer Community

**brien4787** · 06-09-2005, 03:24 PM

i am installing new rear rotors on my car.... it says that i MUST install new brake pads when replacing the brake discs..... MUST i reallly? my pads are not worn at all..they have a lot of life on them...

**Spieluhr** · 06-09-2005, 04:05 PM

yes, you MUST. One way the brake pads and rotors work in conjunction is the pads and rotors get these grooves in them with time and wear and when you press on the brakes, these grooves match up. If you put used brake pads on brand new rotors, the grooves on your pads will not match with your rotors and probably result in a loss of braking ability and possible damage to rotors.

**brien4787** · 06-09-2005, 04:40 PM

going to buy gay pads...damn it..haha

**jrhaile** · 06-09-2005, 06:37 PM

owned! :P oh sorry but yeah you need to replace them at the same time... get some ceramic ones

**brien4787** · 06-09-2005, 06:46 PM

just going oe... i am not sure if i am keeping this car much longer.... no use in spending extra money

**bitcore** · 06-09-2005, 11:12 PM

nothing terribly BAD will happen, the grooves wear out after a while, as would be expected...
It's obviously better to do them at the same time, but if you wanna save some money, you arn't going to die exactly. Although, it still isn't wise to save pennies by slacking in your BREAKING SYSTEM... (I did this, new front rotors and hawk HPS pads all around, but I kept my rear rotors which still had life, but were grooved, they just squeaked like a bitch and took a lot of break-in for breaking preformance to plateu.)
If you re-use the pads, check for ANY cracks or severe grooves. If there are any cracks, toss the pad. Grooves wear out, cracks are bad.

**Rooz** · 06-10-2005, 12:17 PM

it's just like when you put new pads, they will sqeek for a day or two then it's all good

**Antiburn** · 06-10-2005, 07:57 PM

You can let it go the other way. You can keep your rotors if they are good and replace just the pads.