Leaking Master Cylinder Reservoir
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Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality control
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From: Honey Harbour, Ontario, Canada
Originally posted by RENEW1@November 16, 2005, 5:53 PM
Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality control
Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality controlYep someone already mentioned that, I actually made gasket out of a brake fluid bottle. That sealed it for 3 months, then it started leaking again! I noticed once I remove my gasket, that the cap was VERY loose, so I think the plastic deformed over the 3 months!
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Joined: October 13, 2004
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From: Honey Harbour, Ontario, Canada
Originally posted by RENEW1@November 16, 2005, 5:53 PM
:( Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality control
:( Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality control
Yep someone already mentioned that, I actually made gasket out of a brake fluid bottle. That sealed it for 3 months, then it started leaking again! I noticed once I remove my gasket, that the cap was VERY loose, so I think the plastic deformed over the 3 months!
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Joined: November 18, 2005
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Originally posted by RENEW1@November 16, 2005, 6:53 PM
Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality control
Have been reading several threads on leakage around the master cyl. I think the problem is twofold. One, they are overfilling almost to the top, and combine that with a poor fitting cap you get leakage which drips around the reservoir and all over the place. I noticed that the cap has very sloppy fit. In the cap is a rubber diaphram that is supposed to seal to the tank. I find fluid on the cap outside the sealing surface. I made a rubber seal about 1/16' thick, between the cap and the diaphram, and removed some fluid. So far, no leaks. I think it is a hit or miss problem. Some leak,some don't. Just bad engineering or poor production quality controlEven a small amount of brake fluid leaking onto a hot engine can be a bad thing, it's flammable. Also, it's corrosive and will eat the paint off of anything it gets on.
(it's a 2006 Mustang GT.)
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