EXTREMELY useful article from Stoptech on mythical "warped brake rotors"

May be old but I don't remember seeing it. My brakes feel "warped" maybe I'll just swap pads and she how it goes. Nice read, thanks OP

Originally Posted by breiwa1

Did you even watch the video?

Why do you think I said what I said?

Bottom line is, you have no idea what a warped rotor looks like and have no idea what semi-metallic pad material sounds like when it is being chiseled off of a brake rotor. Those rotors are sound, owner applied brakes hard, possibly multiple times and then came to a complete stop burning pad material onto the surface of the rotor in that one spot- BOOM "warped" rotors.

I think I have a much better idea of what one looks like then you do.

Originally Posted by lcoleman

I have my A5. I can and have turned rotors.

Interesting about the ABS unit being able to alter brake bias. I knew it was really sophisticated in the e46...do you have any more info about it mkodama? Or do you just mean that the ABS will counteract any hydraulic bias present?

It's in one of the BMW technical documents on DSC, which I'd have to search around to find. It's not ABS, but an actual brake bias feature, and its function and operation are briefly explained.

Originally Posted by taibinhvuong

The following brake pads warning paragraph on that article is not applied to E46 either, because E46 uses 2 brake wear sensors mounted on the pads (one on front left and one on rear right) to monitor the pads wear instead of the floater mounted inside the brake fluid reservoir as the paragraph stated. When the brake pad wears down to the minimum thickness, the rotor contacts with the sensor and grinds away the wire loop resulting in opening an electrical circuit and a light appears on the dash warning the driver that the pads should be replaced.

In most modern passenger cars, the brake fluid reservoir is designed with a specific volume and is equipped with an internal float. The volume corresponds to the amount of fluid that will be displaced when the pads have worn to the point of replacement plus a generous reserve. When the replacement point is reached, the descending float completes an electrical circuit and a light appears on the dash warning the driver that the pads should be replaced.

The E46 also has that float for warning of low fluid level.

Originally Posted by breiwa1

I did read every word of it, have an extensive background in machining, metallurgy and I think we are down to semantics here.

Same here. Machinist, welder, and mechanical engineering student.

I still think it's uneven pad deposits, and areas of lesser and greater wear, as stoptech was talking about. I guess it is semantics at this point.

I agree

Originally Posted by mkodama

Same here. Machinist, welder, and mechanical engineering student.

I still think it's uneven pad deposits, and areas of lesser and greater wear, as stoptech was talking about. I guess it is semantics at this point.

Regardless of where we disagree here, I think we can all agree that having a wobbly rotor SUCKS. I bought new Meyle rotors from ECS tuning last November/December and they have already started to wobble. I was really disappointed when I got the boxes that were stamped "Meyle Germany" all OVER the place and in small writing it said "Made in China." So I was immediately skeptical at their longevity and they had recently over the past two months started to develop a wobble up front. After reading this article and having to go to another building for a work meeting, I decided that I would try to re-bed them as the pads and rotors are basically brand new. I bed them about 6-8 times on the way up and about 5 more on the way back and there is a significant noticeable difference. I really hope that whatever excessive pad deposit was on them was transformed into normal pad material that is evenly around the rotor now due to the heat from multiple hard braking events.

I guess we shall see...

Group hug

^ Thread killer

Originally Posted by trizzuth

Everyone that owns a BMW and at some point will need to replace the brakes should read this:

http://www.stoptech.com/technical-su...nd-other-myths

You're welcome for sharing this article with you. No credit to me?! DICK

Lol

Originally Posted by onebamf335i

You're welcome for sharing this article with you. No credit to me?! DICK

Eat a dick! and stop trolling me son.

Originally Posted by trizzuth

Eat a dick! and stop trolling me son.

The only troll here is the one living in your ass.

Mount that Mtech bumper NOW! You cheap eff.

E46 >>>>>. E90 ALL DAY LONG. You are just mad that is why you come to my forum to get some relief! HA!

Originally Posted by trizzuth

E46 >>>>>. E90 ALL DAY LONG. You are just mad that is why you come to my forum to get some relief! HA!

Yeah, comic relief.