brake system bleed! how?

[urasula]

Can anyone show, or direct me to a site, me step by step how to bleed the brake system?

[ales]

sure...
www.se-r.net

[ales]

More presicely,

http://www.se-r.net/car_info/brake_performance.html

http://www.se-r.net/brakes/bleeding_brakes.html

Do some sewarching for additional tips

[urasula]

i went to the link, thanx btw, and read the section. i don't understand the reason behind bleeding order i.e LR, RF, RR, LF. why do we have to bleed the system in a certain order? can someone tell me?

[nis.k.a.]

What? You should always start from the most distant from the brake cylinder. So the order should be RR, LR, RF, LF.

[ales]

I don't have the correct order (my FSM cantradicts *within* itself!)

Anyone with a good manual?

[ales]

Oh, and urasula, what car do you have? P11?

[b-b00gie]

I've seen lots of different recommendations on the order in which to bleed your brakes. Not sure if they are all valid or just superstition...


The two I've heard most often are:

- start opposite corner of driver and go sideways, meaning.. RR, LR, RF, LF

or

- start on the opposite corner of your master cylinder and then do opposite corners. meaning... if your cylinder is on the right side of your car do.. LR, RF, RR, LF

[Moppie]

By bleeding the brakes your trying to get all the air out of the system, so by starting at the brake closest to the master cylinder all you do is pump air into the other calipers and lines, and dont remove it.
So regardless of whether your car is RHD or LHD start with the brake futherest from the master cylinder, and work your way back towards it, so the last caliper you bleed is closest to the master cylinder.
But becarefull if you have ABS, some sytems cant be bleed, with out some special high pressure equipment.
And also some modern cars have a 5th bleed nipple either under the car, or near the master cylinder, you want to bleed this nipple first.

[urasula]

ah!!! so that's why. i got it now. thanks everybody!
i have a p10.

[ales]

OK< this is what my manual says: RL> FR; RR> FL. It's because the two "groups" form two different "contours", independent of each other. I wouldn't think that starting with RR (and going across) will be any worse than the previous version...

P.S. Maybe it's because my manual is a translation from a British manual. They do have the MC on the right, don't they?

[Moppie]

I would go off the manual. And yes UK cars, like other Right Hand Drive cars have the MC on the right.
Im going to assume that Nissan split the brakes daigonaly accross the car, instead of into frount and rear. If you look at the MC you might see Two lines running out of it, one for each daigonal, the idea is if one Brakes fails, then its dosn't mean the loss of all the brakes, only one frount, and on rear brake. (could still be intresting stoping.) Basicly the brakes are divided into two seperate systems, one for each diagonal. LR>RF and RR>LF.

[geoff200]

So is there a nipple on the ABS of the Primera GT P10 and P11, or a nipple on the Master Cylinder?

Also what is cavitation and do pressure bleed systems really cause this?