Brakes leaking after replacement ..
10 August 2015, 09:18 PM
#1
Brakes leaking after replacement ..
Probably not the best place to post this but just need a reply ASAP.
Had the misses rear brakes done today, discs, pads and calipers. Just gone out to the car (some 4 hours after bringing it home) and both sides have leaked, is visible on the wheels, but the drivers side has a patch under the car, difficult to say how much fluid has leaked, maybe half a cup, it's wet but not soaked.
My question, is it normal to expect some leakage?
Had the misses rear brakes done today, discs, pads and calipers. Just gone out to the car (some 4 hours after bringing it home) and both sides have leaked, is visible on the wheels, but the drivers side has a patch under the car, difficult to say how much fluid has leaked, maybe half a cup, it's wet but not soaked.
My question, is it normal to expect some leakage?
10 August 2015, 10:19 PM
#6
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They are drum brakes aren't they?
No great surprise if they are. You have to be very careful replacing shoes because the handbrake makes it awkward not to fatally disturb slave cylinders barely hanging on anyway. They'll be dirty and rusty and any significant movement of the piston will kill them completely. I normally expect to replace the slaves with every second set of shoes (or first set if it's an old low mileage motor).
No great surprise if they are. You have to be very careful replacing shoes because the handbrake makes it awkward not to fatally disturb slave cylinders barely hanging on anyway. They'll be dirty and rusty and any significant movement of the piston will kill them completely. I normally expect to replace the slaves with every second set of shoes (or first set if it's an old low mileage motor).
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11 August 2015, 07:21 AM
#9
Scooby Regular
not a good service at that garage then...are you sure they replaced calipers and not overhaul the old ones??? if so could have damaged seals whilst doing it. wouldnt be driving it anywhere else mindue.
Last edited by Munk; 11 August 2015 at 07:22 AM.
11 August 2015, 10:22 AM
#13
No there should zero leakage. A leak may not occur straight away- as fluid may fill the piston boot before eventually finding its way out, or a bit of heat cycling or pressure cycling which wouldn't always be found from a short road test.
Usual cause of leaks is from caliper piston which happens due to running pads the too low for too long (common for rear calipers on low mileage drivers) the piston then spends its life exposed, especially if the rubber boot is damaged. What happens then is when the piston is wound back, rust and dirt damage the piston seal. Also if the pad has run on the metal or caliper has siezed temporarily, the heat generated can also affect the seallwhich then fails when it's pushed back. A new or exchange recon caliper will be required.
Other places of leakage are the seal for the shaft that operates the handbrake. And the flex hose or any steel hose, as these can be disturbed and if they are degraded from age. Disturbing them can cause them to fail (but they will have failed in their own eventually)
Usual cause of leaks is from caliper piston which happens due to running pads the too low for too long (common for rear calipers on low mileage drivers) the piston then spends its life exposed, especially if the rubber boot is damaged. What happens then is when the piston is wound back, rust and dirt damage the piston seal. Also if the pad has run on the metal or caliper has siezed temporarily, the heat generated can also affect the seallwhich then fails when it's pushed back. A new or exchange recon caliper will be required.
Other places of leakage are the seal for the shaft that operates the handbrake. And the flex hose or any steel hose, as these can be disturbed and if they are degraded from age. Disturbing them can cause them to fail (but they will have failed in their own eventually)
Last edited by ALi-B; 11 August 2015 at 10:34 AM.
11 August 2015, 10:46 AM
#14
Sorry, Scrub the above about the calipers unless you meant the slides and guides where removed and cleaned in which case the caliper body is still the original.
Calipers usually are recon exchanges, not seen any fail myself; that's mostly with Delphi and TMD (Parid) branded recon calipers.
Calipers usually are recon exchanges, not seen any fail myself; that's mostly with Delphi and TMD (Parid) branded recon calipers.
14 August 2015, 07:27 AM
#18
I didn't die, the brakes felt fine and the levels were good.
The garage tells me there are cups under the suspension, said cups filled up with brake fluid and dripped out over the wheels, making it look like the lines had leaked.
Anyone they apologised and cleaned it up.
The garage tells me there are cups under the suspension, said cups filled up with brake fluid and dripped out over the wheels, making it look like the lines had leaked.
Anyone they apologised and cleaned it up.
14 August 2015, 11:32 AM
#19
I didn't die, the brakes felt fine and the levels were good.
The garage tells me there are cups under the suspension, said cups filled up with brake fluid and dripped out over the wheels, making it look like the lines had leaked.
Anyone they apologised and cleaned it up.
The garage tells me there are cups under the suspension, said cups filled up with brake fluid and dripped out over the wheels, making it look like the lines had leaked.
Anyone they apologised and cleaned it up.
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