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bmw156
16-07-10, 11:27 AM
Hey guys, on kellys nova, the brakes are failing the mot because the passenger one is very light, and the driver one is normal.

i have fitted new calipers, bled them up with an easy bleed and the pedal feels solid as, and put in new fluid.

could it be the MC which is knackered, so its not applying enough pressure to that side?

the fluid level doesnt change btw, so no leaks
bazil
16-07-10, 11:34 AM
What was the readings on the rear? Maybe to much pressure going to the rear on that circuit
bmw156
16-07-10, 11:35 AM
they showed me the sheet, and he said the performance was ok. just unbiased.

thats why i think its not the calipers and the MC instead
mowgli
16-07-10, 11:36 AM
definitely look at the rears. if both the rears are fully adjusted up, then the mc could well be knackered.. what are the flexi pipes like? if one has a bulge, it could be about to fail.
bmw156
16-07-10, 11:50 AM
the rears are fine, not even mentioned on the MOT check,
and ill check the lines. thanks :D
bazil
16-07-10, 11:58 AM
This will sound stupid but check the number on the valve things that reduce the pressure to the rear, they should both be the same, if one is different it may cause problems, Lee put up info on them in articles
bmw156
16-07-10, 12:01 PM
thanks i will look.

but its all completely original and has been sitting for 5 years, so thats why i think the seals in the MC can be fooked
AlexW
16-07-10, 12:02 PM
Change the mc, can get a second hand one for a fiver or a new one (with the correct fittings) are about £25.
bmw156
16-07-10, 12:09 PM
Change the mc, can get a second hand one for a fiver or a new one (with the correct fittings) are about £25.

will my one not just bolt of and on... what special fittings could i need?
AlexW
16-07-10, 01:07 PM
Some new cheap ones dont have the two different sizes of union, so thus require pipe adjustment.