Master cylinder....HELP!!!
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New User
Joined: Jun 2009
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Master cylinder....HELP!!!
Working on a 69 250 with power disks.My master cylinder was leaking a lot from the top cover. the brakes work fine just leaking on to the power steering gunk.I tried a new gasket, didnt help
. So I went out and bought a new master trying to save time figuering out what was wrong. I put the new one in and same problem I hit the brakes a few time(in the driveway) and its leaking from the top. I tried adjusting the rod from the booster but didnt help. I filled the cylinder to about 1/2" below the top thinking I over filled it. Can anyone point me in the right direction.My head hurts.Thanks.
. So I went out and bought a new master trying to save time figuering out what was wrong. I put the new one in and same problem I hit the brakes a few time(in the driveway) and its leaking from the top. I tried adjusting the rod from the booster but didnt help. I filled the cylinder to about 1/2" below the top thinking I over filled it. Can anyone point me in the right direction.My head hurts.Thanks.
Junior User
Joined: Jun 2009
Posts: 71
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From: Inland Empire, So Cal.
Wow, I have the same truck, and am replacing the master cylinder because mine leaks the same way. Hope to get to it by Tuesday. Hope I don't run into the same issue you are. If you figure it out, please post and let us know.
I don't have a solution for you, except maybe the "new" one is defective as well? I am sure some great answers are on the way!
I don't have a solution for you, except maybe the "new" one is defective as well? I am sure some great answers are on the way!
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New User
Joined: Jun 2009
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What now?
Just took my truck to the local Big O tires. They said try replacing the cap again. Did that. Still leaking from the top.So what do I do now. I took it to the pros and they dont know what to do. I am think of driving of a tall cliff to see if that helps. Gota have brakes. any ideas at all. How full are you guys filling the master?
Junior User
Joined: Jun 2009
Posts: 71
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From: Inland Empire, So Cal.
Just took my truck to the local Big O tires. They said try replacing the cap again. Did that. Still leaking from the top.So what do I do now. I took it to the pros and they dont know what to do. I am think of driving of a tall cliff to see if that helps. Gota have brakes. any ideas at all. How full are you guys filling the master?
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
It is possible to get more than one reman or rebuilt master cylinder that leaks at the top. I keep an old tire tube around for times like this.
I might suggest you get something rubber, (do you still have the old MC) and cut a gasket to place on top of the existing one. It only needs to be at the rim where the top and sides meet.
I was able to stop a leaking MC by doing this a few years back that is still working today.
John
I might suggest you get something rubber, (do you still have the old MC) and cut a gasket to place on top of the existing one. It only needs to be at the rim where the top and sides meet.
I was able to stop a leaking MC by doing this a few years back that is still working today.
John
