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Unread 04-08-2013, 05:35 PM   #1
kel-uk
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were my new brake pads fitted correctly?

i recently had my rear brake pads replaced my a 'friend in the know'!
he used a special tool to push the piston back on the calipers and fitted the pads as expected.
since then my brakes kept 'locking on' ! then it seemed ok in the wet winter we have just had here in the UK and i didnt notice it anymore and thought it had corrected itself, but as soon as it got warmer/drier and i went for a slightly longer drive (about 20 miles) they locked on again and i had smoke coming from my rear brakes again on both sides!! i have purchased some 2nd hand calipers to put on it but..................
i have just read another thread about changing brake pads and it states that if you are using the caliper piston tool to press the piston back you should open the cap to the brake master cylinder (which makes sense to me) but my friend definitely did NOT do that!! could this be the reason they are locking on? And if so can i fix it ???? or has he buggered my master cylinder????
please help :-(

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Unread 04-08-2013, 05:53 PM   #2
Candymancan
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Sounds to me more like the brake caliper pins are stuck.. Did he lube them up ? Here ia link to the pin im talking about


http://www.lurayimportservice.com/job.htm
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Unread 04-08-2013, 05:57 PM   #3
Technohead
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I find that calipers will often "stick" after doing a brake job. Especially if they are old. Its happened to me so often that as a rule I replace the calipers every second time the pads are replaced.
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Unread 04-08-2013, 06:14 PM   #4
kel-uk
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i do believe he didnt lubricate the pin - or anything else for that matter!!!
with that in mind where do i go from here?! do i tell him to take them back off, replace calipers, lube the pin and what about the master cylinder? will the brakes need bleeding from not allowing the pressure to release or just do that bit properly this time??!! lol
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Unread 04-08-2013, 06:55 PM   #5
Technohead
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Replacing calipers is one notch above trivial. But chances are this is also the time to replace the brake hoses. And then the fitting on the end of the brake line will snap so a new flare will need to be created. And then . . .

The joys of keeping a 15+ year old vehicle on the road . . .
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Unread 04-08-2013, 06:56 PM   #6
Technohead
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P.S.

Don't just throw parts at it. Step 1: Take it apart and diagnose the problem. Step 2: Fix it.

Diagnosing problems via the Internet is dubious at best.
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Unread 04-09-2013, 08:07 AM   #7
durango-bob
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Brake fluid absorbs moisture over time which can corrode the inside of the caliper piston bore. Then when you put on new pads and compress the piston, it hangs up on the corrosion and binds. This is why it is recommended that you bleed the brakes until you get fresh fluid out. New calipers will most likely fix your problem but you should bleed them to get fresh fluid in the system.
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Unread 04-09-2013, 08:15 AM   #8
ratmonkey
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You don't need to open the cap when depressing the piston.
Your calipers are just worn out. Time to replace.
Replace the soft lines at the calipers as well.
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