Master Cylinder Question
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,118
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From: Madeira Beach, FL
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The MC is a Cardone GM core rebuild. The core is GM with proper corvette part number and bleeders. Cardone just rebuilt the existing GM core not built the core.
I feel it is a correct replacement I just need to get the air out. It may have to come back off the car for a proper bench bleed. I did use the bleeders on the MC body to bench bleed and stroked the piston with my hand. Fluid was drawn into my miti vac and when I pushed the piston fluid shot straight up into the air from the reservoir in the front only. Then I mounted it. Guess I did it wrong.
Marshal
I feel it is a correct replacement I just need to get the air out. It may have to come back off the car for a proper bench bleed. I did use the bleeders on the MC body to bench bleed and stroked the piston with my hand. Fluid was drawn into my miti vac and when I pushed the piston fluid shot straight up into the air from the reservoir in the front only. Then I mounted it. Guess I did it wrong.
Marshal
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Well, I can't see a thing through the world of internet. But here is my take on your M.C.
Its not a Delco Remy. It may have a Corvette part number, but that is on paper only, not on the part itself.
Being a cardone GM, it could fit a Chevelle, a Camaro or a Nova. I don't know. But I suspect its NOT Corvette specific.
So now we are back to the subject of the imperative measurement between the booster rod and the MC piston. Lets call the dimension a "gap". As I recall, the specs for that gap is 0.060. More than that and you have too much pedal travel. Less than that and your brakes will drag constantly due to the brake pedal pushing the MC piston. Could the wrong MC change the gap? I bet.
I think you are frustrated because you are not 100% sure its the correct MC. You are 80% sure. You need a MC that came off a Corvette the exact same year as yours. Not a different yr. Not a different model.
Next. Your bench bleeding kit should have been hooked up to the MC line ports. Then the fluid is recycled from the ports to the reservoir via the tubing. Then, when you mount the MC on the car, note there is no brake fluid in the brake lines. So, there is another air pocket. Any time the lines are removed, you have introduced air and a complete bleed is in order. But you knew that.
Good Luck.
Its not a Delco Remy. It may have a Corvette part number, but that is on paper only, not on the part itself.
Being a cardone GM, it could fit a Chevelle, a Camaro or a Nova. I don't know. But I suspect its NOT Corvette specific.
So now we are back to the subject of the imperative measurement between the booster rod and the MC piston. Lets call the dimension a "gap". As I recall, the specs for that gap is 0.060. More than that and you have too much pedal travel. Less than that and your brakes will drag constantly due to the brake pedal pushing the MC piston. Could the wrong MC change the gap? I bet.
I think you are frustrated because you are not 100% sure its the correct MC. You are 80% sure. You need a MC that came off a Corvette the exact same year as yours. Not a different yr. Not a different model.
Next. Your bench bleeding kit should have been hooked up to the MC line ports. Then the fluid is recycled from the ports to the reservoir via the tubing. Then, when you mount the MC on the car, note there is no brake fluid in the brake lines. So, there is another air pocket. Any time the lines are removed, you have introduced air and a complete bleed is in order. But you knew that.
Good Luck.
Last edited by HeadsU.P.; Jan 23, 2020 at 06:18 PM.
