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Thread: Astra Brakes problem

  
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    Question Astra Brakes problem

    Hi!
    I'm new to this Forum and I hope I have chosen the correct section for this Post.

    The car in question is an Astra Arctic 1.6 with A/C and a distinctive sporty look. I've owned it about 6 months. I'm not sure what model it is - but it is year "R".

    I've just overhauled the front brakes; new pads and discs. A fairly straightforward job. Problem now is that when the car is stationary, the foot-brake pedal has a lot of travel & when the car is in motion - albeit slowly - there is hardly any braking at all: foot goes almost to the floor. In desperation, I have bled the front brakes, but to no avail (the brakes were bled with help of an assistant using the time-honoured tube & jam-jar method. During bleeding, I made sure that the reservoir did not run dry & let air in). However, I can't see that bleeding was necessary anyway since renewing the discs and pads didn't disturb the hydraulic system to the extent of letting any air in. Prior to this maintenance job, the front brakes were reasonable as regards stopping - but clearly in need of overhaul. And there was not this problem of excessive foot-pedal travel.

    I'm stuck on this. What have I done wrong?

    Al.

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    dannysport18's Avatar
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    well your Astra is a VAUXHALL ASTRA ARCTIC

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    hi did u pump the brake pedal a few times before trying it

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    A common problem on those im afraid. When you pushed the piston of the calliper back for the new pads the fluid returning to the master cylinder has flipped the seals over inside it. A new master cylinder is required.



    NO RISK NO FUN


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    Quote Originally Posted by RustysAstraSRI View Post
    hi did u pump the brake pedal a few times before trying it
    Thanks for the reply. I'm a little unsure of what you are asking me. Could you expand your Q. for me, please?

    Thanks.

    Al.

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    after fitting the brake pads did you press the pedal quite a few times so it pushs the piston back out to compress the pads

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    sure sounds like you have flipped the seals. There are two ways of fixing it, the lucky way and the expensive way. Lucky way.... give the master cylinder a few taps on the front with a 2lb hammer and they often pop back the right way round. The expensive way.... change the master cylinder
    Be Happy


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    i think wot JIMINI said mite be correct tho

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    Question

    Thanks for the reply, jmini.

    I have done this work a few times before on Astra 1.4 cars, but don't recall this problem. Although I hear what you say, I did push the brake calipier piston back nice and slowly with the top of the reservoir open to allow for fluid rise, since I know that if the calipier piston is pushed back too hard / too quick, you get the problem you have described.
    Since replacing the master cylinder sounds like a very expensive garage job, is it worth my while bleeding the whole braking system anyway - just to see if . . . . ?

    Al.

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    Quote Originally Posted by RustysAstraSRI View Post
    After fitting the brake pads did you press the pedal quite a few times so it pushes the piston back out to compress the pads
    Ah! Now I understand - thanks.
    The answer is "yes".

    Al.

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