Brakes.......These Brakes Update
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
Brakes.......These Brakes Update
In my Brakes.....These Brakes post I have a brake pedal that goes to the floor and the vehicle will not stop. I replaced my left rear brake caliper because it was leaking the brake pads were wet on the left rear so I replaced the rear brake pads.
I used a motive power bleeder to bleed the rear brakes. When I opened the bleeder on the LR side fluid came out of the inner and inner bleeder fluid came out in a trickle instead of a stream when under pressure. Fluid from the outer bleeder came out in a trickle as well. I pumped the power bleeder between 20-25psi IAW the service manual. No fluid came out of any of the bleeders on the right rear caliper. I then went to the front and opened the bleeder, no fluid from either caliper. The master cylinder was full (I did siphon out some fluid prior to placing the bleeder onto it)
I did drive the vehicle two blocks at a slow speed and applied the brakes pedal went straight to the floor and I then heard a clunk from the LR side as I applied the brakes. what could this possibly be? I'm pretty frustrated now because I do not know what the hell this could be
anyone ever experience this? any suggestions comments please
I used a motive power bleeder to bleed the rear brakes. When I opened the bleeder on the LR side fluid came out of the inner and inner bleeder fluid came out in a trickle instead of a stream when under pressure. Fluid from the outer bleeder came out in a trickle as well. I pumped the power bleeder between 20-25psi IAW the service manual. No fluid came out of any of the bleeders on the right rear caliper. I then went to the front and opened the bleeder, no fluid from either caliper. The master cylinder was full (I did siphon out some fluid prior to placing the bleeder onto it)
I did drive the vehicle two blocks at a slow speed and applied the brakes pedal went straight to the floor and I then heard a clunk from the LR side as I applied the brakes. what could this possibly be? I'm pretty frustrated now because I do not know what the hell this could be
anyone ever experience this? any suggestions comments please
Last edited by Oldguard 7; Aug 5, 2015 at 10:11 PM. Reason: typos
Burning Brakes
Joined: Mar 2006
Posts: 829
Likes: 131
From: Spartanburg SC
i would think you either have a major blockage coming out of your mc (which I doubt) or the motive wasn't working properly. I would start on the right rear and try to get something out of it. It is farthest from your mc. I've always bled rr,lr, rf then lf.
I guess a major failure of your mc could happen, but, that would be highly coincidental with the replacement of the caliper. Were the brakes working good prior to replacing the caliper?
I guess a major failure of your mc could happen, but, that would be highly coincidental with the replacement of the caliper. Were the brakes working good prior to replacing the caliper?
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
In my Brakes.....These Brakes post I have a brake pedal that goes to the floor and the vehicle will not stop. I replaced my left rear brake caliper because it was leaking the brake pads were wet on the left rear so I replaced the rear brake pads.
I used a motive power bleeder to bleed the rear brakes. When I opened the bleeder on the LR side fluid came out of the inner and inner bleeder fluid came out in a trickle instead of a stream when under pressure. Fluid from the outer bleeder came out in a trickle as well. I pumped the power bleeder between 20-25psi IAW the service manual. No fluid came out of any of the bleeders on the right rear caliper. I then went to the front and opened the bleeder, no fluid from either caliper. The master cylinder was full (I did siphon out some fluid prior to placing the bleeder onto it)
I did drive the vehicle two blocks at a slow speed and applied the brakes pedal went straight to the floor and I then heard a clunk from the LR side as I applied the brakes. what could this possible be? I'm pretty frustrated now because I do not know what the hell this could be
nyone ever experience this? any suggestions comments please
I used a motive power bleeder to bleed the rear brakes. When I opened the bleeder on the LR side fluid came out of the inner and inner bleeder fluid came out in a trickle instead of a stream when under pressure. Fluid from the outer bleeder came out in a trickle as well. I pumped the power bleeder between 20-25psi IAW the service manual. No fluid came out of any of the bleeders on the right rear caliper. I then went to the front and opened the bleeder, no fluid from either caliper. The master cylinder was full (I did siphon out some fluid prior to placing the bleeder onto it)
I did drive the vehicle two blocks at a slow speed and applied the brakes pedal went straight to the floor and I then heard a clunk from the LR side as I applied the brakes. what could this possible be? I'm pretty frustrated now because I do not know what the hell this could be
nyone ever experience this? any suggestions comments please
If you get nothing then you may have air in the master cylinder. I would then try to slowly move the pedal in and out 5 or 6 times to see if anything changes.
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,600
Likes: 7,046
From: New Or-leens Loo-z-anna
Corvette brakes can be a PAIN to bleed sometimes.
If the master cylinder has ever run out of fluid in one of the bowls, it needs to be bled with the 2 main brake lines disconnected from it until all the air is worked out (it took 20 minutes for me to bleed my '68 master cylinder/a two-person job if it is bled while still bolted to the firewall).
If the master cylinder has ever run out of fluid in one of the bowls, it needs to be bled with the 2 main brake lines disconnected from it until all the air is worked out (it took 20 minutes for me to bleed my '68 master cylinder/a two-person job if it is bled while still bolted to the firewall).
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
The early C3's had an adjustable master cylinder push rod and its possible your push rod needs to be shortened a turn or two. Then when rust builds up behind the rear piston the rust will often prevent the piston from fully retracting which prevents bleeding the brakes. When you slowly depress your brake pedal you should feel the clearance in your booster THEN some clearance between the push rod and the rear piston (about 1/4" of pedal travel). If you don't feel that "second" clearance your rear piston isn't fully retracting.
