Quote:
Originally Posted by 80stech
I would say it's a good bet that the caliper is starting to seize/drag. Did you notice anything when you spread the calipers to install the pads?? Are you sure there is no air in the hydraulic system? Caliper pins are good? A warped or bent rotor won't cause that problem. Wheel bearing would make lots of noise long before anything else.
|
Well, I didn't do it by myself. I'm more of an "electronic and electric" guy. My indie BMW specialized mechanic did that. And I believe the system was bled properly with the bleeding tool etc. The other three brake rotors are completely fine.
And if I remember correctly, the caliper pins also look fine. Just by looking and spreading the calipers, we did not notice anything odd. Everything looks as it should be.
My guess was also that it is less likely a rotor or wheel bearing. What about the bad pads? Is it possible that the right one is just thicker than it should be?
Quote:
Originally Posted by Henn28
Agreed. Likely need a replacement caliper, or time to rebuild the one you have. Check the brake lines to the caliper too. I'm not sure if they degrade internally like other cars I've had, but they could be shedding crap into the caliper internals that is causing it to drag. One of my jeeps had the same issue your X is having several years ago and it took a new caliper and brake line.
|
Right, I forgot the brake lines! But if I remember correctly, from looking at them, they also seem okay. I think we're going to try with other calipers, as soon as my mechanic gets some free time. I wouldn't dare to do it by myself, because I may not properly bleed the system.
If the problem persists, then definitely the lines maybe...
Quote:
Originally Posted by Bdc101
If it gets that hot I would expect the car pulls to the right when you drive. Is that the case at all?
Either way taking the caliper off, inspecting the pads and rotor, will probably tell you the culprit.
|
Well, the temperature is not that different between the left and right rotor. The left one gets on a hot day and a long ride up to 90 degrees Celsius (194F), while the right one goes up, tops to 160 (320F) - and that is after the caliper. By specs, if I googled correctly, these ATE Power rotors can get pretty hot, so this is not too problematic for them.. But it can get in the long run.
And no, it doesn't pull, because it is the rear rotor. And I noticed that it heats up only because I started to hear the noise coming from the rear right wheel, and I noticed a higher temperature in the right rear tire.
Anyhow, last time we took everything off, cleaned the caliper again, and tried to spread it... Everything seemed okay. But it isn't. So, I will try with the other set of calipers first.
And the handbrake pads? I believe they would heat up the entire disc a bit more evenly. It wouldn't be the hottest after the caliper?