Brakes Again - Master Cylinder?

[Guest diyjoke]

Still bleeding the brakes regularly, still getting the same conditions: pedal runs to the floor, ok after 1 or 2 pumps, any more and the brakes don't work.

Next will be the master cylinder. Questions: is there a seal kit available for this? Is it novice diy stuff? Should I just change out the master cylinder?

Any help would be gratefully received.

Regards,

Mac

[myglaren]

Correct me if I am wrong but I believe that for some years now repair kits for master cylinders have been unobtainable and it is illegal to repair them yourself.

 

You may be able to buy a service exchange unit that has been professionally rebuilt.

 

Your symptoms would certainly indicate a master cylinder defect.

[coastline taxis]

Correct me if I am wrong but I believe that for some years now repair kits for master cylinders have been unobtainable and it is illegal to repair them yourself.

 

You may be able to buy a service exchange unit that has been professionally rebuilt.

 

Your symptoms would certainly indicate a master cylinder defect.

Its a fairly straight forward job to do nothing tricky. remove the cylinder from the servo with the brake pipes still attached then tirn cylinder so that the brake pipes are pointing up then remove them that way youl probaly get away without having to bleed them

[techbod]

Correct me if I am wrong but I believe that for some years now repair kits for master cylinders have been unobtainable and it is illegal to repair them yourself.

 

You may be able to buy a service exchange unit that has been professionally rebuilt.

 

Your symptoms would certainly indicate a master cylinder defect.

 

its not illegal to repair your own stuff as long as it meets safety regs and your competent and you can still buy repair kits but getting harder

[myglaren]

its not illegal to repair your own stuff as long as it meets safety regs and your competent and you can still buy repair kits but getting harder

 

I have done quite a few in the past but not for years.

The motor factor I used told me that repair kits had been outlawed so I never bothered with it again - never needed to either, fortunately.

[Guest diyjoke]

I have done quite a few in the past but not for years.

The motor factor I used told me that repair kits had been outlawed so I never bothered with it again - never needed to either, fortunately.

Thanks for the advice. It's going in to the local indie for the 100k service on Wednesday at that time I'll ask them to check the diagnostic for any foul play in the ABS system (assuming this is possible?) If the ABS isn't causing a problem and I don't have any joy just changing the master cylinder then they can have it back again. I can only use it between home and the indie garage anyway.

Regards,

Mac

[Guest diyjoke]

Thanks for the advice. It's going in to the local indie for the 100k service on Wednesday at that time I'll ask them to check the diagnostic for any foul play in the ABS system (assuming this is possible?) If the ABS isn't causing a problem and I don't have any joy just changing the master cylinder then they can have it back again. I can only use it between home and the indie garage anyway.

Regards,

Mac

100k service conducted successfully, small number of advisory precautions (next year). No problem with the ABS but, a week later and the problem has gone away. I'm obviously delighted that this has happened but completely mystified as to why and rather apprehensive that as a direct fault hasn't been found and rectified that it might reappear at any time. Back to the Indie for advice. The only things I can imagine may have happened are: the new caliper came with new boots and grease for the pins. The boots looked good so I didn't change them and didn't know what would happen if I pulled the pins all the way out so I left them in situ and withdrew them as fasr as possible. I then cleaned and greased the visible area of the pin and popped the boots back on. The old grease was white and congealed, could this have caused some sticking?

Also, as I can't understand the mechanics of the piston and handbrake arrangement, I did have a suspicion that the piston was somehow withdrawing back in to the caliper (the old pads were used). Has something suddenly 'taken up the slack' in the new caliper? Anyway it works so I'm not complaining but wishing I could offer some advice for anyone who might experience similar problems in fthe future.

Thanks again for the advice, as always it is much appreciated.

Kind regards,

Mac