Brakes applying themselves
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Brakes applying themselves
Here's a new one. Driving along the other day and the back starts hopping. Stop to check and I notice that the rear brake is hot. Stop and wait for it to cool down and then look at the rear calliper, give a wiggle and it is free again. It then drove fine for a couple of days and then today, whilst driving down the road it starts to hop again. Stop and the same hub is hot. Only a mile home so drove slowly back to check it out. Thinking it is some muck got into it causing it to stick. (Living in the Rockies, lots of sand on the road at the moment to deal with all the snow.)
When I get home found that front left wheel is cool but all other 3 are HOT!!
The hopping started on a long flat stretch and I hadn't applied the brakes. Is it possible for the ABS sensor to apply the brakes when you are not using the pedal or is there another reason for 3 wheels to start braking?
When I get home found that front left wheel is cool but all other 3 are HOT!!
The hopping started on a long flat stretch and I hadn't applied the brakes. Is it possible for the ABS sensor to apply the brakes when you are not using the pedal or is there another reason for 3 wheels to start braking?
i ain't rite
Joined: Mar 2005
Posts: 65,507
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From: Marlboro Mental Hospital.
^^^ yup^^^
i have replaced 2 calipers on my 02 and 4 on my 04.
the 04 does a lot of sitting, the 02 is used almost every day.
i have found sitting is not good for the calipers.
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From: Isanti, MN
Your post wasn't clear, so I have to ask. Was the caliper that was sticking the first time also hot when you found 3 of them sticking? Or was that the cool one?
I agree with Tom and Jason, sounds like you have a sticky caliper.
I agree with Tom and Jason, sounds like you have a sticky caliper.
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First time the rear calliper was hot and after a wiggle it was free. What I didn't check that time was if the other 2 were hot. I have experienced 1 sticky calliper before with other vehicles but not 3, so didn't think to check. It drove all week without any signs of reoccurrence until yesturday. The only reason I noticed that the other side was hot was because I had driven through some deep snow and my wheels were shiney on the 3 which were hot where as the cold one was covered in road salt. I have had sticky callipers before and not known them to "free up" without cleaning especially as my commute to work includes some steep mountains and I use the brakes so they are being cycled. I seems strange that they would all be fine under heavy use, but then when driving along a flat straight section they would suddenly start binding? That is why I thought of the ABS thinking that the "cold wheel" had locked up and it was trying to compensate with the other 3. The only thing with that idea was that you didn't get the usual judder like you do when ABS is activated but just the hopping as the drive train tried to fight the brakes.
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I had a similar issue on my 02. ABS light was on and I stupidly ignored it. but the yes the ABS can applie brakes without pedal pressure. My passenger side tire rubbed through my abs line and caused a sieze. Ended up replacing sensor and hub.
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Just been out to look at the brakes. They're all lose! Took it for a drive and did a neutral free wheel test and it just rolled. Did some heavy braking to engage the ABS and got the judder through the brake pedal (a bit of fun on icy roads at -14C). Came home and all disks cool enough to touch. Must be some electrical glitch?
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Hotshot
Joined: May 2005
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From: Stevens Point, WI
Might be possible the pins are getting rusty and binding up. If it were mine I would pull the caliper, drain it and push the pistons back in, clean and grease pins, and reinstall.
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Had to pull front end apart for another problem, so have checked the fronts. The brakes were all changed 6 months ago. All the pins we cleaned and regreased at this time. Took the fronts apart to check them and they were still good. As I had them apart, cleaned them up again and regreased. Will get to the back ones soon as I get a chance. The brakes have been fine again for the last couple of days.
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