Brake fluid leak when using power bleeder

#1

I have used my Motive power bleeder twice on my e30 and both times I had brake fluid leak pretty significantly from below the brake fluid reservoir. It looks like its coming from the gasket between the master cylinder and the reservoir. See link part number 2.

[url]http://www.realoem.com/bmw/showparts...21&hg=34&fg=25

Has anyone else had this problem? I am pumping the bleeder up to 15 psi as the instructions suggest. Is this too much pressure? I bought two new gaskets to see if mine are just old and not sealing properly.

#2

hey, you need to drop the pressure to 10psi . you are only bleeding the brakes not trying to blow up the resivoir. Also it is nothing to worry about , the fluid is still going to the calipers.

#3

Mine did the same thing so I had the res gasket(s) replaced. I haven’t bled them since and haven’t had any leaks.

Carter

#4

I did it last weekend and ~~ 20 PSI had no leaks

#5

No votes for speed bleeder? Really cheap, really easy.

www.speedbleeder.com

#6

edavidson wrote:

[quote]No votes for speed bleeder? Really cheap, really easy.

www.speedbleeder.com[/quote]
Someone else’s power bleeder… the cost of 4 speed bleeders = one pressure bleeder

#7

edavidson wrote:

[quote]No votes for speed bleeder? Really cheap, really easy.

www.speedbleeder.com[/quote]

Just my own personal account, but I’ll never use those again. I broke two off in the calipers (using a tiny little wrench and not much pressure), they weren’t that easy to get in just the right place so they’d activate and bleed, and when they were tight, I could have sworn I had to bleed my brakes more often as they seemed to be letting in air.

#8

Update: I replaced the two rubber seals between the reservoir and master cylinder and that seems to have corrected my leaking issues. I pumped up my pressure bleeder to 15psi and no leaks. BTW, these seals are only $3.00 each and my original ones were in really bad shape. Might be worth looking into if you haven’t done yours already. It took me about 15 minutes plus a little time to bleed out the air.

#9

I’m on my first set - but thanks for the warning. No problems here so far.

#10

You should only use the absolute minimum required PSI to bleed brakes. 7-9 PSI Max is all you need. The system was not designed to handle more than that. If you pump the resevior up like a basket ball then the seals and o-rings will leak/burst.