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Old 08-26-2010, 09:36 PM   #5
DKN
Active Member
 
Join Date: Feb 2008
Location: Los Angles CA
Posts: 136
Re: Need brake help, again

These cars mount the booster on a large angle and can get air trapped at the end of the master cylinder bore. This is how I bleed the mastercylinder after it has been installed:

Unbolt the master cylinder from the booster. Position the master cylinder so the front is lower than the back. While the master cylinder is in this position compress the piston in one of the front brake calipers. (I usually wedge a screw driver between the caliper and the rotor and pull the screw driver with just enough force to move the caliper being carfull not to damadge the rotor.) This will cause the fluid to flow bacward thru the master cylinder. If you had any air trapped in the bore of the master cylinder it will be pushed out of the bore and into the reservoir. Then to bleed the rear circuit keep the front of the master cylinder positioned lower than the rear and using a blunt tool like a screw driver or a punch compress the master cylinder piston and release it several times. When you compress the master cylinder piston the rear wheel cylinders will extend. When you release the return springs inside the drum will compress the wheel cylinders creating a back flow once again pushing the air from the master cylinder bore up into the reservoir. Re-install the master cylider against the booster.

Danny Nix
CPP

Last edited by DKN; 08-26-2010 at 09:38 PM.
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