Master Cylinder Leak

[Copakekid]

I recently purchased a 1973 Javalin w/ 360 4bbl. All smog stuff has been removed. My master cylinder leaks fluid out from underneath the cover. Any ideas what is causing this? The car has front disc brakes. any help would be appreciated. I put a new pice of vacuum hose from the brake booster to the intake which is an edelbrock performer. from the looks of the outside of the master cylinder and the inner fender its been leaking for some time.

[CloudyB]

How does the rubber gasket look inside the cover?? Could need replaced.

[Copakekid]

It doesn't seem to be dried out.

[CloudyB]

I would take the cover to the parts store and get a new one. Also see if the bar coming across has enough pressure to hold it down.This way it would be process of elimination to be sure.And then you can go from there.
It's not a chrome cover is it???? Might not be a good fit from an after market product.
Let us know what happens.

[Copakekid]

It's not chrome. I'll try a new gasket and new hold down rod if I can find one.
Thanks for the help. I'll let you know how it works out.

[javelinjeff]

just a thought here,try bleeding the brakes,start at RR,LR,RF,LF. you should get GOOD flow at all wheel cylinders/calipers.you will need a helper to do this.open bleeder valve,have helper push pedal to floor and HOLD it down.close bleeder screw THEN have helper let up on pedal.this is IMPORTANT-DO NOT LET THE PEDAL COME BACK UP WITH THE BLEEDER SCREW OPEN!!!!!if you do not have good flow at the rear brakes(as i'm suspecting)the your metering valve is only allowing the front brakes to work.i've seen this before,the master cylinder will bypass all the fluid back into itself.if you are not experienced in doing this find someone who is.a brake shop will bleed and adjust you brakes for a reasonable charge.also only fill the master cylinder to 1/4" from the top.unless that rubber seal is no good,you may be looking at another problem