9 replies to this topic

[hcmini1989]

hi there i recently rebuilt my mini only thing left to do is bleed brake after 4 attempts of bleeding the brakes we still have nothing its running mini sport 4 pot calipers on the front and standard drums on the rear its got an early type brake master cylinder the same as the clutch master and thers no pedal there at all but if i pump the pedal really fast there is a little pedal right at the bottom but if i lett all the way up again it looses its pressure its a brand new unipart master cylinder the calipers on the front are new only bits i havnt changed is the wheel cylinders on the rear there is no leaks and cluid comes from every bleed point

[nicklouse]

have you bled them in the correct order? shortest first? as if the pedal is pumping up there is still air in there. you have bled the rears as well?

[Purple Tom]

Just to check - have you got the calipers on the right way round, i.e with the bleed nipples at the top? Can't remember what Minisports calipers are like, but I know this has been an issue before.

Might be worth seeing if you can get any pressure into the system using a one man bleeding kit (Gunsons Eezibleed is good!).

[chris_gilly]

i had this problem on my mini, on mine it was because the nipples were blocked, try n poke a dowel up the bleed nipple once loosened, hope this helps!!

[hcmini1989]

i had this problem on my mini, on mine it was because the nipples were blocked, try n poke a dowel up the bleed nipple once loosened, hope this helps!!

right i have bled the system the right way starting with the furthest away from the master there could be air left in there but therews no pedal reasistance at all unless i pump the pedal realy fast if i hold it down the its ok doesnt loos any pressure but if let the pedal back up slowly then press down again thers nothig at all and bleeds arnt blocked and calipers have the nipples at the bottom so could be on the wrong way but it should still bleed up thanks for the suggestion any more lol

[Purple Tom]

If the bleed nipples are at the bottom then all of the air will collect at the top of the calipers in the fluid chambers as air is lighter than brake fluid.

I'm afraid you're going to need to swap the calipers so the bleed nipples are at the top - that will solve your problem.

[Kernal H]

To check which cylinder is the problem you can always clamp off the hoses one by one and see which makes a difference to the brake pedal. Helped me when I was bleeding my brakes!

[Zenob1]

Purple Tom's spot on with this one - swap the calipers and go again.

Should find it's a differant story.

Matt

[hcmini1989]

Purple Tom's spot on with this one - swap the calipers and go again.

Should find it's a differant story.

Matt

ill swap tommorow and try again and i cant clamp the hoses because there all braided thanks for the ideas ill let yopu know tommorow

[hcmini1989]

Purple Tom's spot on with this one - swap the calipers and go again.

Should find it's a differant story.

Matt

ill swap tommorow and try again and i cant clamp the hoses because there all braided thanks for the ideas ill let yopu know tommorow

ok thanks alotevery one changed the calipers around and hey presto thanks alot