New Brake Master Cylinder Leak

[kurt v]

Almost looks like the brass fitting might be hitting the master cyl on the left side keeping it from pulling up,

[Bored&Stroked]

Probably too thin of copper washers . . . . as somebody wants to save money on the copper used!

[mgm60]

Update:
Finally stopped the leak. Doubling the copper washers did not work. Bought these speciality washers from Earls, recommended by someone over on the HAMB and also used this sealant recommended by 19forty. Thanks for all the suggestions and hopefully this helps somebody with the same problem in the future.

[vincent]

Are you sure your brakes will work if you seal them with some liquid glue and a rubber o-ring that is already squeezing out at the edges of the hexagon? IMHO these seals are never meant to take the pressure of a hydraulic brake. I would not ride with you....

[tubman]

Originally Posted by vincent

Are you sure your brakes will work if you seal them with some liquid glue and a rubber o-ring that is already squeezing out at the edges of the hexagon? IMHO these seals are never meant to take the pressure of a hydraulic brake. I would not ride with you....

I was thinking the same thing. This appears to be a "band-aid" at best.

[glennpm]

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You mention two new master cylinders. Are the exit holes threaded deep enough? The new washer you used is thicker and would overcome this. You may want to trial fit with no washers and check that the banjo bolt can be tightened up enough so the brass block can't be rotated?


Glenn

[69a]

Originally Posted by mgm60

Update:
Finally stopped the leak. Doubling the copper washers did not work. Bought these speciality washers from Earls, recommended by someone over on the HAMB and also used this sealant recommended by 19forty. Thanks for all the suggestions and hopefully this helps somebody with the same problem in the future.

I would be very dubious about using those rubber washers! Are they even compatible with brake fluid?

[Blindhuckster]

I had the same issue with a new master cylinder a couple years ago that I purchased from Dennis Carpenter. Leaked in the exact same spot. I tried multiple times with different washers without resolve. It seemed to me that the master cylinder outlet port was not drilled squarely and was drilled at an angle from looking at the washer. They were only seating on one side of the washers. Ordered a new replacement master cylinder, washers and block fitting from the early ford store and that solved the problem.
Nate

[69a]

Originally Posted by Blindhuckster

I had the same issue with a new master cylinder a couple years ago that I purchased from Dennis Carpenter. Leaked in the exact same spot. I tried multiple times with different washers without resolve. It seemed to me that the master cylinder outlet port was not drilled squarely and was drilled at an angle from looking at the washer. They were only seating on one side of the washers. Ordered a new replacement master cylinder, washers and block fitting from the early ford store and that solved the problem.
Nate

Finally a solution that makes sense! Good spotting, Nate.
Easy to check with feeler gauges. Send it back to the seller for a refund or replacement. It is "NOT FIT FOR PURPOSE".