No fluid to the rear brakes - Team Camaro Tech
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post #1 of 6 (permalink) Old Jun 2nd, 10, 12:38 PM Thread Starter
Jacob
 
Join Date: Jun 2010
Location: Virginia
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No fluid to the rear brakes

I'm fixing up a 1973 Camaro. It has a new Master Cylinder, new pads, brakes, etc. When bleeding the brakes, I can't get fluid to the rear brakes. What causes this?
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post #2 of 6 (permalink) Old Jun 2nd, 10, 01:18 PM
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Ryan
 
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Re: No fluid to the rear brakes

Did you bench bleed both reservoirs when you replaced the MC's. The reason I ask is the rear reservoir took much longer to bleed than the front.

Also...my proportioning valve was gummed up and jammed on a 79 I had and gave me the same issue, so it may be worth looking at cleaning or replacing (it was cheap enough for me in the 90's to just replace)

1969 X66
1964 Corvette 327/300
1998 SS Vert
1987 Regal


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post #3 of 6 (permalink) Old Jun 2nd, 10, 01:34 PM
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Matt
 
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Re: No fluid to the rear brakes

First, bench bleeding the MC is a must. Second, did you use a new rod or your old rod? Could be the push rod is the wrong size/length and the piston in the MC is not traveling far enough to engage the rear... You can also try gravity bleeding by opening up the rear bleed screw and letting gravity push the fluid to the rear. I had the same issue and it turned out that I did not get all the air during the initial bench bleeding. I was able to bench bleed again with the MC on the firewall and that did the trick for me.

Matt

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post #4 of 6 (permalink) Old Jun 2nd, 10, 01:44 PM
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BILL
 
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Re: No fluid to the rear brakes

as matt said, gravity bleed the rear, one side at a time and start with the farthest wheel form the master first!

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if you have a bbc in your 1st gen 67-69 camaro click on the link below and enjoy the veiw and post yours up!!
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if you have an all original 1st gen camaro 67-69 click on the link below and enjoy the veiw and post your up!!
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post #5 of 6 (permalink) Old Jun 2nd, 10, 01:49 PM
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Re: No fluid to the rear brakes

Make sure the proportioning valve isn't stuck. Sometimes happens when trying to bleed with a new master cylinder.

Check for fluid there first ?

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #6 of 6 (permalink) Old Jun 3rd, 10, 07:05 AM
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Chuck
 
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Re: No fluid to the rear brakes

Pressure differential valve in the combination valve is off center. Attach a test light to the connection on the valve, if it lights up the valve is off center. To center it, open a bleeder on the a front caliper and have an assistant slowly push on the brake pedal until the light goes out. Close the bleeder on the front. The valve is centered and you should be alble to bleed the rear brakes.
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