no brake pedal bite

rickisgrate

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fitted a set of 284mm discs and calipers today, bled them through countless times by both pumping the pedal and using an easy bleed kit but the pedals still hitting the floor, bled all 4 brakes and still nothing.

Help:Cry:
 

rickisgrate

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bleed nipples are at the top, pads fitted properly:sad:
 

rickisgrate

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yup all 4 brakes bled, plenty of fluid coming through the bleed nipples, no leaks coming from anywhere
 

rickisgrate

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no bubbles, fluids running smoothly through all 4. Pedal goes hard with the engine off then soft with the engine on
 

rickisgrate

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goes hard then goes soft again after its been pumped up
 
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sounds like the master cyinder seals have either popped or flipped over during bleeding
 
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I was just about to say, check the master cylinder. Ive came across this on another car in the past and the symptoms sound pretty much the same.
All the best mate, hope you get it sorted.
 
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What a lot of people dont realise is this. In 2000 vauxhall did a recall on all mk3 astras built. The problem was dirt and water ingress into the master cylinder reservoir. The recall was basically vauxhall get your car in and give you a discount for checking/replacing the brake fluid. This however is not good enough. The number of times ive seen on here problems with master cylinders. Yes the seals have possibly flipped over but also if you remove the master cylinder from the servo and clean it out by dismantling it you will find all sorts of dirt and muck in the lines holding the seals open. Normal bleeding wont move it it has to be disassembled and cleaned. Worth a look. Like i say its a problem with all mk3s.
 
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As far as i am aware the master Cylinder from 256mm brakes is not large enough to provide a good pedal when changing to 284mm or 288mm, I had the same problem so i have got a larger MC for my car it isn't fitted but i am sure it will solve the problem. Got it for 25 pounds posted off this site!!!!!! From a Cav Turbo.
 

Andy_Mk3

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As far as i am aware the master Cylinder from 256mm brakes is not large enough to provide a good pedal when changing to 284mm or 288mm, I had the same problem so i have got a larger MC for my car it isn't fitted but i am sure it will solve the problem. Got it for 25 pounds posted off this site!!!!!! From a Cav Turbo.
I changed from 1.6 to 288mm brakes with no difference to the pedal hardly :thumb:
 
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yeah id heard the same, i has a problem with brakes on the corsa and a soft pedal, turns out the servo had died
 

astranaut

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What a lot of people dont realise is this. In 2000 vauxhall did a recall on all mk3 astras built. The problem was dirt and water ingress into the master cylinder reservoir. The recall was basically vauxhall get your car in and give you a discount for checking/replacing the brake fluid. This however is not good enough. The number of times ive seen on here problems with master cylinders. Yes the seals have possibly flipped over but also if you remove the master cylinder from the servo and clean it out by dismantling it you will find all sorts of dirt and muck in the lines holding the seals open. Normal bleeding wont move it it has to be disassembled and cleaned. Worth a look. Like i say its a problem with all mk3s.
mine has a the initial letter and a certificate for this recall, but it got a new master cylinder at a discount as well as brakes inspected/fluid change.
 

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