Leaky MC
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Senior User
Joined: May 2014
Posts: 463
Likes: 2
From: Ashton, MD.
Leaky MC
So I replaced my booster and master cylinder a few weeks ago. All is well with the braking system but dang... the top to this MC leaks like crazy. From the front, back, and side. The top seems to be on tight and i even tried making a gasket out of 1/16 and it's STILL leaking. What in the actual F.
Laughing Gas
Joined: Feb 2016
Posts: 817
Likes: 27
So I replaced my booster and master cylinder a few weeks ago. All is well with the braking system but dang... the top to this MC leaks like crazy. From the front, back, and side. The top seems to be on tight and i even tried making a gasket out of 1/16 and it's STILL leaking. What in the actual F.
Lead Driver
Joined: Nov 2013
Posts: 7,178
Likes: 1,174
I went through the same thing with a reman MC.
First, make sure the wire bail clamps the cap tightly at both ends. I had to bend the wire slightly at one end to increase the clamping force.
I also found the top edge of the new MC body was rusty and pitted. To clean this up, I emptied the reservoirs with an old turkey baster. I stuffed them full of crumpled paper towels, lightly dampened with brake fluid to catch any crud. I wrapped some 100 grit sandpaper around a flat scrap of particle board and went to town. Carefully remove the paper towels, wipe the reservoirs clean, and make sure you didn't leave any crud behind.
Worked great, no more leaks.
First, make sure the wire bail clamps the cap tightly at both ends. I had to bend the wire slightly at one end to increase the clamping force.
I also found the top edge of the new MC body was rusty and pitted. To clean this up, I emptied the reservoirs with an old turkey baster. I stuffed them full of crumpled paper towels, lightly dampened with brake fluid to catch any crud. I wrapped some 100 grit sandpaper around a flat scrap of particle board and went to town. Carefully remove the paper towels, wipe the reservoirs clean, and make sure you didn't leave any crud behind.
Worked great, no more leaks.
Laughing Gas
Joined: Feb 2016
Posts: 817
Likes: 27
I went through the same thing with a reman MC.
First, make sure the wire bail clamps the cap tightly at both ends. I had to bend the wire slightly at one end to increase the clamping force.
I also found the top edge of the new MC body was rusty and pitted. To clean this up, I emptied the reservoirs with an old turkey baster. I stuffed them full of crumpled paper towels, lightly dampened with brake fluid to catch any crud. I wrapped some 100 grit sandpaper around a flat scrap of particle board and went to town. Carefully remove the paper towels, wipe the reservoirs clean, and make sure you didn't leave any crud behind.
Worked great, no more leaks.
First, make sure the wire bail clamps the cap tightly at both ends. I had to bend the wire slightly at one end to increase the clamping force.
I also found the top edge of the new MC body was rusty and pitted. To clean this up, I emptied the reservoirs with an old turkey baster. I stuffed them full of crumpled paper towels, lightly dampened with brake fluid to catch any crud. I wrapped some 100 grit sandpaper around a flat scrap of particle board and went to town. Carefully remove the paper towels, wipe the reservoirs clean, and make sure you didn't leave any crud behind.
Worked great, no more leaks.
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Senior User
Joined: May 2014
Posts: 463
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From: Ashton, MD.
Alright I bent that coat hanger retainer thingy up and made it way tighter. Also tried to make sure the cap was centered on the gasket I made out of 1/16. If that thing leaks now I quit.
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