It is a Mercury Sable 1996. I have change the pads, the caliper and the brake hose of this wheel (left rear) but every time the pads keep sticking with the disc. I checked the bearings and they look ok, there is not any play and run free (when I take the caliper out of the disc). Even when the car is cold the pads are still touching the disc but it gets worse when I drive on the highway at 70 mph, then this wheel start to make a noise (friction) and when I stop this wheel is hotter than the other ones. When I hit the brakes the opposite wheel brakes better than this one. Also when I brake on the highway the noise stops starting again when I loose the brake, this also happens when I change from the left lane to the right and the noise get worse when I change from right to left.
2007-12-11 09:16:28 · 5 answers · asked by Javier F 1 in Cars & Transportation ➔ Maintenance & Repairs
The caliper bolts are designed to allow the caliper to slide laterally in order to keep both pads in equal contact with the rotor.
On GM & Ford vehicles this accomplished by special caliper bolts that have an outer part that slides on an inner part. (this is difficult to describe in words). This should be lubricated, but they often sieze due to water, road grime, or brake pad dust entering them.
Remove the rotor and check that the caliper is able to move freely in this fashion. If not, then one of the pads will not release properly.
2007-12-11 09:49:28 · answer #1 · answered by snake_slinger 4 · 0⤊ 0⤋
The valve could cause problems by not letting the fluid return to the reservoir when you let off the brakes, but it's probably the piston sticking in the caliper. Getting hot would make it worse. A bad valve would affect the brakes on both sides equally.
2007-12-11 11:07:14 · answer #2 · answered by Nomadd 7 · 0⤊ 0⤋
I ran into a similar problem with my yoter, it drove me nuts until I figured out that I needed to bleed the rear brakes then the front ones. It took a couple of times but the problem finally cleared up. The proportioning valve has a safety that will cut off fluid to a brake cyl. if it detects a leak. Good luck.
2007-12-11 09:26:46 · answer #3 · answered by mad_mav70 6 · 0⤊ 0⤋
Have you checked the emergancy brake, that it is completely released? If so, then maybe, but I would also have the system power flushed and pumped to be sure there is no air or trash in the lines. That brought another thought, check to make sure the lines are not pinched.
2007-12-11 09:25:09 · answer #4 · answered by Anonymous · 2⤊ 0⤋
sounds like u have air n lines need 2 bleedbreaks
2007-12-11 10:06:18 · answer #5 · answered by oldschool69 4 · 0⤊ 0⤋