front brakes won't bleed

[saltshaker]

Thanks, the MC has two bleeders on it....the rear when opened flows. The front
when opened won't. Probably a bad MC!
Jon

[Tom Kirkham]

Originally Posted by saltshaker

Thanks, the MC has two bleeders on it....the rear when opened flows. The front
when opened won't. Probably a bad MC!
Jon

Can you post a picture? I have never seen a master cylinder with 2 bleeders. For that matter I have only seen 1 bleeder on a motorcycle master cylinder, never for a car.

[patrickt]

Originally Posted by Tom Kirkham

Can you post a picture? I have never seen a master cylinder with 2 bleeders. For that matter I have only seen 1 bleeder on a motorcycle master cylinder, never for a car.

Some 1968-1973 Corvette Master Cylinders came with dual bleeder valves. They look like this:

[trularin]

Stupid as this may sound, remove the line from the MC and ask someone to gently push down on the pedal. Fluid should shoot out so use a rag.

Are you sure you put the balance bar in or the control rod to activate the MC?

This is nuts.

Reach into the footwell and push the rod. Fluid should come out.

Pull the darn MC and work it by hand.

[patrickt]

Originally Posted by trularin

Stupid as this may sound, remove the line from the MC and ask someone to gently push down on the pedal. Fluid should shoot out so use a rag.

You might even put a Ziplock freezer bag around it just in case it performs like "Old Faithful" when he pumps the pedal and the geyser of brake fluid makes a bee-line for his paint job.

[saltshaker]

To be honest....there wasn't fluid in that side of the MC !!...
All four corners have been bleed and there aren't any leaks, but the pedal is soft. Do I bleed them again and using a vacuum system how much fluid should I draw from each caliper?
Thanks,
Jon

[patrickt]

Originally Posted by saltshaker

To be honest....there wasn't fluid in that side of the MC !!...
All four corners have been bleed and there aren't any leaks, but the pedal is soft.

With the dual bleeders on the MC you can bleed it as well with an air tight plastic tube running back in to the reservoirs themselves (you don't have to undo the fittings).

[Tom Kirkham]

Originally Posted by patrickt

Some 1968-1973 Corvette Master Cylinders came with dual bleeder valves.

Thank you. I guess you can tell I have not worked on many Vetts.