Vehicle & Technical > Discovery

correct method to bleed brakes??

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Skywalker:
AFAIK the "accepted" method is do the furthest away from the master cylinder first; then again, I've done it in all sorts of order before and never found it made a lot of difference.

Few things I've learnt over the years which might be useful :roll:

1) Don't re-use brake fluid you've pumped through until it's stood for at least 24/48 hours, it will contain microscopic air bubbles and keep it in a sealed container as it is hygroscopic and will absorbe water from the atmosphere

2) Best way is if you can get 2 helpers, one to press the pedal and one to keep topping up the master cylinder ................ or 1 helper who can keep nipping out of the car to top it up  :wink:

2) If it's proving awkward to get a decent pedal, stick the bleed pipe in the jar of brake fluid, pump the brakes to get a bit of pressure in the system' hold it down' then release the bleed nipple, hold the pedal down and lightly nip up the bleed nipple before letting go the pedal.  Bit tedious but will help work the air through and should ensure your not sucking any air back in; do this several times on each wheel and see if there is any improvement.

3) Pump the pedal steadily, not "hell for leather"

4) If you can get a fairly decent pedal pressure, but pehaps "not quite as good as it could be", providing it's safe to drive (and stop), use the car for a day or two and then do the whole thing again.  

5) Brake bleeding can be a royal pain in the ar$e  :shock:

(I 'spose you know brake fluid is about the best "paint stripper" known to man ........ so keep it off the bodywork)

If you've already done all the above and there's no improvement, go have a cup of tea, go get another 5litres of brake fluid and keep at it

hth

Dave :roll: :roll:

woody:
GOOD ADVICE FROM SKYWALKER

also i have been known to tie up load senser valves in the closed position

as this is another brake cyl

me thinks the cup of tea is the best idea :wink:

nickW:
thanks, where are the load sensor valves

woody:

--- Quote from: "nickW" ---thanks, where are the load sensor valves
--- End quote ---


IF you have one and i am not sure
it will look like a small rod pos on a ball joint from your rear axle to a valve block prob inside of your chassis

if you follow brake pipes back from rear axle past flexi pipes where they meet the chassis it should be around there if you have one
KICK MY SELF UP *RSE DONT THINK DISCO HAS LOAD VALVE ON

Skywalker:

--- Quote from: "woody" ---

me thinks the cup of tea is the best idea :wink:
--- End quote ---


Me too ................ but now it's getting a bit later in the day a cold beer sounds even better  8)

Dave

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