leaking master cylinder out of cap

Posted By: Anonymous

leaking master cylinder out of cap - 04/09/09 05:24 PM

I installed a new master cylinder and booster on my dart. Im noticing after I get done driving it that the master is pushing brake fluid out of the cap? I also have a pretty low pedal with good wheel cylinders and calipers as well as no air in the system. Anyone got any ideas what the problem is

Posted By: satgtx

Re: leaking master cylinder out of cap - 04/09/09 06:36 PM

new MC is bad. had it happen to me went through everything twice until i figured it out. remans suck.

Posted By: deansrr

Re: leaking master cylinder out of cap - 04/09/09 07:55 PM

check to make sure rubber seal is good on MC, did you bench bleed the MC before putting it on, are rear brakes adjusted up. Could also have possible brake hose bad, if not I agree with above statement MC bad

Posted By: JohnRR

Re: leaking master cylinder out of cap - 04/09/09 09:04 PM

What kind of master is and and where did you get it ?

Posted By: KillerBee

Re: leaking master cylinder out of cap - 04/09/09 09:23 PM

Quote:

What kind of master is and and where did you get it ?

It wouldn't happen to be one of those new style aluminum ones would it?
Maybe from Rick E?

Posted By: Classof70Chally

Re: leaking master cylinder out of cap - 04/09/09 10:26 PM

I just went thru this with a new MC. I suspected that the lid itself was leaking due to sloshing, up and downhills, etc. What I did was to lower the level of the fluid slightly (1/2") and put a bit more bend in the cheesy wire bail for more down pressure on the cap. So far, so good.

Posted By: Ts road runner

Re: leaking master cylinder out of cap - 04/10/09 01:23 AM

Bend the wire down it works

Posted By: TJP

Re: leaking master cylinder out of cap - 04/10/09 01:28 AM

Quote:

Bend the wire down it works

Posted By: CtownChris

Re: leaking master cylinder out of cap - 04/10/09 02:03 AM

Like they said. Tighten the wire bail. Just squeeze it a little snap it over the cap. Don't take it off the master. Just gently tighten up and replace cap.

Posted By: Anonymous

Re: leaking master cylinder out of cap - 04/10/09 03:18 AM

Remember he said a low pedal too. On top of the cap not being secured completely check for an internal leak in the master cylinder. Either that or if it has a brake booster make sure the rod isnt too far in or out.

Posted By: Rick_Ehrenberg

Re: leaking master cylinder out of cap - 04/10/09 03:24 AM

Common failure mode, esp. on rebuilts: Pumps fluid from one reservoir to the other. Scary.

Rick

Posted By: Rollin Hand

Re: leaking master cylinder out of cap - 04/10/09 03:25 AM

Quote:

Common failure mode, esp. on rebuilts: Pumps fluid from one reservoir to the other. Scary.

Rick

Posted By: Posest

Re: leaking master cylinder out of cap - 04/10/09 04:04 AM

Had that happen to me also.