Front Brake caliper fix question
#1
03-25-2017, 06:47 PM
Front Brake caliper fix question
The front passenger brake is getting abnormally hot from driving. We assumed it is a stuck caliper not releasing pressure from the brake pad.
We thought it might be the guide pins that were gunked up from winter driving in the great white north but they were clean and free. So we tried pushing the piston in with a caliper tool and it didn't move easily. We did get it pushed back in all the way. Reinstalled it on the car and went for a drive. The brake still heated up.
We figured that there may be rust on the piston so we tried to pop it out by pushing on the brake pedal. We got it out to where it looks like it might be just about be ready to come out but it won't move any more. It looks to be a little crooked but we were able to straighten again. We've tried pushing it back in but it won't go. Then tried pushing the brake pedal to get it out but it won't move passed a certain point. Also the brake pedal won't go any further (car off). If we start the car and then turn it off we can push the pedal in all the way again but then it stops again on the next push. We don't want to try with the car running as it may push too hard with the power brakes?
Any suggestions for getting the piston out of the caliper. Or getting it back in the caliper? We stuck right now.
With the piston almost all the way out (maybe an 1" exposed) there isn't any rust or build up but some dry film that's a little rust color.
We also sprayed some PB Blaster under the boot see if some lube helped allow the piston to push back in but again, it didn't move.
Is there anything holding the piston in the caliper at the very end of its extension?
No parts places around here have calipers or rebuild kits in stock so we can't just get parts this weekend. We were hoping to take apart the caliper, clean it (if gunked up) and then reassemble and install. There is no brake fluid leaking out anywhere right now.
TIA
We thought it might be the guide pins that were gunked up from winter driving in the great white north but they were clean and free. So we tried pushing the piston in with a caliper tool and it didn't move easily. We did get it pushed back in all the way. Reinstalled it on the car and went for a drive. The brake still heated up.
We figured that there may be rust on the piston so we tried to pop it out by pushing on the brake pedal. We got it out to where it looks like it might be just about be ready to come out but it won't move any more. It looks to be a little crooked but we were able to straighten again. We've tried pushing it back in but it won't go. Then tried pushing the brake pedal to get it out but it won't move passed a certain point. Also the brake pedal won't go any further (car off). If we start the car and then turn it off we can push the pedal in all the way again but then it stops again on the next push. We don't want to try with the car running as it may push too hard with the power brakes?
Any suggestions for getting the piston out of the caliper. Or getting it back in the caliper? We stuck right now.
With the piston almost all the way out (maybe an 1" exposed) there isn't any rust or build up but some dry film that's a little rust color.
We also sprayed some PB Blaster under the boot see if some lube helped allow the piston to push back in but again, it didn't move.
Is there anything holding the piston in the caliper at the very end of its extension?
No parts places around here have calipers or rebuild kits in stock so we can't just get parts this weekend. We were hoping to take apart the caliper, clean it (if gunked up) and then reassemble and install. There is no brake fluid leaking out anywhere right now.
TIA
#2
03-26-2017, 09:34 AM
After sleeping on it we decided to take the caliper off the car and push the piston out with a rod through the brake hose hole. It came out pretty easily by tapping the rod with a hammer.
There was a small cut in the boot that looks to have let water in and there was a build up of rust under the large O-ring-like seal that was likely putting pressure on the piston and not letting it move freely.
None of the stores in the area have calipers or rebuild kits in stock so we cleaned all the rust out and re-assembled the caliper. We'll see if it works while we wait to get parts in.
There was a small cut in the boot that looks to have let water in and there was a build up of rust under the large O-ring-like seal that was likely putting pressure on the piston and not letting it move freely.
None of the stores in the area have calipers or rebuild kits in stock so we cleaned all the rust out and re-assembled the caliper. We'll see if it works while we wait to get parts in.
#3
03-27-2017, 09:17 AM
5th Gear
After sleeping on it we decided to take the caliper off the car and push the piston out with a rod through the brake hose hole. It came out pretty easily by tapping the rod with a hammer.
There was a small cut in the boot that looks to have let water in and there was a build up of rust under the large O-ring-like seal that was likely putting pressure on the piston and not letting it move freely.
None of the stores in the area have calipers or rebuild kits in stock so we cleaned all the rust out and re-assembled the caliper. We'll see if it works while we wait to get parts in.
There was a small cut in the boot that looks to have let water in and there was a build up of rust under the large O-ring-like seal that was likely putting pressure on the piston and not letting it move freely.
None of the stores in the area have calipers or rebuild kits in stock so we cleaned all the rust out and re-assembled the caliper. We'll see if it works while we wait to get parts in.
