Brake bleeding.....

[meta_volante]

Hi forumgoers

I am going to bleed the brakes on me S40,just 2 quick questions

1, I pressume I will need an opened spanner - any idea what size ? (I am at work you see, and I can get the spanner from here and take it back home with me)

2, Anyone know of a correct bleeding sequence / order (osr,nsr etc) ?

TIA

meta

[4 forty]

right hand rear
left hand rear
right hand front
left hand front.

you are much better useing a ring spanner for the bleed nipple,if the nipple is tight, an open ended spanner might damage it.

paul

[caveman]

one of those bleeding kits helped me a lot when i bled my brakes on my 740, theyre to help you if youre on your own,
regards
rob
ps, as 4forty says, use a ring spanner!

[meta_volante]

Originally Posted by caveman

one of those bleeding kits helped me a lot when i bled my brakes on my 740, theyre to help you if youre on your own,
regards
rob
ps, as 4forty says, use a ring spanner!

Rob / Paul

thanks guys I brought a bleeding kit as suggested. any thoughts on the size? is it approx 10 or 11mm for the spanner needed?

meta

[caveman]

tbh andy, i used a pair of mole grips as id previously rounded off the nut with an open ended spanner! if you use mole grips, tighten them on the nut as much as you can! i havent got a clue what the size is though,
regards
rob

[quattrothedog]

with a car fitted with abs, it normally is advised to have the engine running while bleeding the brakes.

make sure it's securely on axle stands tho, you DON'T want it to fall on you !!

[mharriso]

Sorry to correct but i am sure this is the sequence as the master cyl is in the front rhs of the car. Ignore me if i misread the first reply and am repeating it.. long week...and i'm upside down....

Rear LHS
Rear RHS
Front LHS
Front RHS

This is way easier if you have 2 people, one pumps the pedal, the other opens and closes the bleed nipple.
Pump, open close pedal release, pump, open, close pedal release etc etc etc

Remember to kep the fluid resevoir bottle topped up as you go or you'll suck air in.. then you have to start all over.... not funny..
Do the clutch while your at it.. same procedure...

Have fun....

[meta_volante]

Originally Posted by mharriso

Sorry to correct but i am sure this is the sequence as the master cyl is in the front rhs of the car. Ignore me if i misread the first reply and am repeating it.. long week...and i'm upside down....

mharriso,

do you mean,the righthand side as you look at the engine from the front of the car,or the righthand side from being insde the car? As my master cyclinder is on the lefthand side as I stand in front of the car...?

err sorry about that, my explanation was about as clear as fog

meta

[mharriso]

Hey meta,

Looking down on the car in plan view...(birds eye view... not the fish fingers...)
The logic is you start wth the brake calliper furthest way from the master cylider (under the bonnet) and work your way toward it (the brake master cyl...)

Re having the engine running... we never did that in that factory...the thought about flushing the ABS actuator is irrelevent as the valving inside locks a section of the brake circuit off unless the abs acutator is actuating.. i.e. pulsing.... as if the car was skidding... this won't happen with just the engine on, and you can't create it without the right software running to the actuator.....i.e. to instruct the valves to open in the right sequence....

This is why when we fill at factory we attached avac union to the brake fluid resevoir, and a connection to ttha ABS actuator, we operte the actuator as we pull a vacumn in the whole system , do a leak check i.e. vacumn level drop over time, if ok the brake fluid is pumped / sucked into the system while the actiator is still pulsing.. this way you fill the whole system and get no air in it.. this totally takes about 60 secs... a little longer in the garage.....

Hope this is of interest....

pm me if you want more info / can't sleep.. haha

[thespringfield]

Originally Posted by mharriso

Sorry to correct but i am sure this is the sequence as the master cyl is in the front rhs of the car. Ignore me if i misread the first reply and am repeating it.. long week...and i'm upside down....

Rear LHS
Rear RHS
Front LHS
Front RHS

This is way easier if you have 2 people, one pumps the pedal, the other opens and closes the bleed nipple.
Pump, open close pedal release, pump, open, close pedal release etc etc etc

Remember to kep the fluid resevoir bottle topped up as you go or you'll suck air in.. then you have to start all over.... not funny..
Do the clutch while your at it.. same procedure...

Have fun....

This is very odd because my Haynes Manual for the S40 & V50 (2004-2007) states it should be done as follows:

Front left
Rear right
Front right
Rear left

I attach an image of the Haynes Manual extract for reference. Any one know who is right? The people on here or the Haynes? Just wondering as I am going to do this job at the weekend.

Cheers.