Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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Ok, so this has been ongoing for around two months..
It went to kwik fit (her idea not mine) was advised rear shoes and drums, so took car away and had them done. Then had two slave cylinders at same time.
Pedal was still going almost all way to the floor.
Got a
Servo and master cylinder from a mate, first of all changed master cylinder, and had same issue, so changed the servo too, still same problem.
All pointed towards master cylinder still.
So I bought a brand new master cylinder, and STILL the same
Issue.
Then got a whole new assembly (2nd hand) was working fine on this car. Fitted the lot, from
His car. All one assembly, so I knew didn't like any seal etc up wrong.
It's STILL the same. Any ideas?
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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ballooning flexi-hose?
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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I changed one flexi hose already.
What do y mean by ballooning mate? Never heard of that
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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as in ruptured on the inside, so that when you press the pedal, force goes into stretching the hose instead of moving the pads
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Aidan-Fleming
Member
Registered: 17th May 08
Location: Westhill, Aberdeenshire
User status: Offline
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Change all the brake Lines?
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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I don't have a never ending pot of money, and this is her car not mine.
Is already cost over £300 and still not sorted.
How can I test flexi hoses? Never heard of this issue before
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Matty W
Member
Registered: 31st Jan 11
Location: Ashton-in-Makerfield, Greater Manchester
User status: Offline
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jack the car up and get someone to press the brake. watch the hose to see if it bulges.
thats a cross section of a flexi. you can see the cableing inside. with use, it can fray, causing the whole hose to blow up like a balloon when you apply pressure. it might only be slight
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johnhara1
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Registered: 19th Oct 06
Location: Newcastle upon Tyne
User status: Offline
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quote:
Originally posted by Matty W
ballooning flexi-hose?
This,
or the rear brakes have not been wound out so they are snug but just off the drum when they were replaced.
If they have to travel, then the pedal will also travel.
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vauxhallMADlee
Member
Registered: 2nd Mar 13
Location: tipton
User status: Offline
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quote:
Originally posted by johnhara1
quote:
Originally posted by Matty W
ballooning flexi-hose?
This,
or the rear brakes have not been wound out so they are snug but just off the drum when they were replaced.
If they have to travel, then the pedal will also travel.
i would also suggest this, make sure the handbrake has been adjusted properly, i know i had a similar problem on a corsa i had which ended up being the adjustment on the shoes wasnt good enough, basically when brake wasnt applied the shoes are resting too far away from drum surface like john says, and if the handbrake has been adjusted by the cable instead of adjusters this will also give you the same problem as your foot brake pushes on the top of the shoes out to drum and when handbrake is pulled they push shoes out from the bottom, if you dont get the balance right between the foot brake and cable operation you will get free movement in pedal
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vauxhallMADlee
Member
Registered: 2nd Mar 13
Location: tipton
User status: Offline
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quote:
Originally posted by Generation
Ok, so this has been ongoing for around two months..
It went to kwik fit (her idea not mine) was advised rear shoes and drums, so took car away and had them done. Then had two slave cylinders at same time.
Pedal was still going almost all way to the floor.
Got a
Servo and master cylinder from a mate, first of all changed master cylinder, and had same issue, so changed the servo too, still same problem.
All pointed towards master cylinder still.
So I bought a brand new master cylinder, and STILL the same
Issue.
Then got a whole new assembly (2nd hand) was working fine on this car. Fitted the lot, from
His car. All one assembly, so I knew didn't like any seal etc up wrong.
It's STILL the same. Any ideas?
also what car is it mate? as it might have a rear load sensing valve which basically the heavier weight you put in back it compensates and puts more pressure on the rear brakes
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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It's a Corsa b. I will look into the above abit more.
Great replies, thinking outside box
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boomtings1
Member
Registered: 25th Apr 11
Location: Sheffield
User status: Offline
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You changed the front calipers by any chance? The bleed nipples need to be at the top.
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davegreen
Premium Member
Registered: 20th May 12
Location: Oxfordshire
User status: Offline
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as already said check rear brakes are adjusted correctly then bleed them all again. if still bad adjust free play between pedal and servo.
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vauxhallMADlee
Member
Registered: 2nd Mar 13
Location: tipton
User status: Offline
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quote:
Originally posted by boomtings1
You changed the front calipers by any chance? The bleed nipples need to be at the top.
yh this is a good point aswell iv also seen this done,some one fitted 2.0 calipers wrong way so nipples were at bottom instead of top didnt matter how you bleed it you wont get a good pedal
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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Nope, standard calipers mate
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monkeytwizzel
Member
Registered: 10th Aug 11
Location: Chard, Somerset
User status: Offline
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As mentioned,check rear brake adjustment is correct and you havn`t got a damaged hose.
All brakes bled properly!
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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Fluid is completely clear. Will check hoses tomorrow. I've done countless work to my Corsa and other cars with engine conversions etc. however, have no idea how rear drums look and what is looking for hhaha
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
User status: Offline
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I had this problem by doing as was mentioned above just having the brake callipers on the front upside down, made sure he bleed nipple was at the top and hey prest bled and fixed.
Don't mean to be patronising but are you bleeding the brakes correctly and with fresh brake fluid every time not re using old stuff even if it was new anyway.
Bleed nipple open, brake pedal Down, bleed nipple shut, brake pedal up. Using clear hosing on the nipple so you can see air bubbles if any?
Also be really sure you have no leaks lay cardboard or something under each wheel so you can see drips and remember about the brake fluid splitter box behind the battery tray/expansion tank
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
User status: Offline
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I noticed on migweb you said you used a pressure system to do it on your own, make sure the tyre you are using is around 25psi don't go higher
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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I'm not using a pressure system mate, just foot on brake pedal.
Also, stoneyginger. Original calipers to the car, even double checked after you said it
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
User status: Offline
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I'm really struggling to understand what's happening, it'll be something so obvious when you do figure it out!
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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No brakes for 80% of the pedal travel
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
User status: Offline
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To me that just suggests air in the brake lines, bleeding the rear brakes first then the front?
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DERV-POWER
Member
Registered: 13th Sep 09
Location: Greenfield, Flintshire
User status: Offline
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front pads coming away from backing material , looks like a small crack
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Jamie-C
Member
Registered: 3rd Jun 08
Location: Ballycastle
User status: Offline
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It sounds as if the rear shoes haven't been adjusted up correctly, pull of the hub and there should be a little wheel to adjust them out, looks like a cog. Adjust them out just so theres very slight friction when turning the hub.
If that doesn't work, what worked for me was wedging the brake pedal down overnight with a block of wood and that made my pedal 10x better, but I don't think that would help in your case if theres no brakes for 80% of the pedal. Always worth a try though.
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