At 11:15 PM 2/12/02 -0500, Scott Hower wrote:
>I recently rebuilt a pair of MGB calipers. After installing them and
>bleeding the system, one of them appears to be leaking .... I used new
>Lockheed pistons and seals. ....
>
>The leak appears to be coming from the piston/dust seal area on the
>inboard half of the caliper. ....
>
>Any idea why this thing leaks?
Probably a bit of debris in the groove that carries the square section
o-ring seal inside of the caliper body. The fluid is most likely leaking
past the outside of that seal, not between the seal and the piston. Pop
the piston out again, remove the square section piston seal from the
housing, clean the groove SPOTLESSLY clean, reassemble the caliper, bleed
it again, and your leak should go away.
>.... I'm using DOT5 fluid. A well respected MG guru has told me
>that "with DOT5, they'll probably all leak". I don't find that to be an
>acceptable answer, especially since the other caliper doesn't. After what
>I have invested in the Glasurit paintwork, I'm dreading a switch over to GTLMA.
I'm with you. I have had years of good service from DOT5 fluid with no
problems, not so happy with DOT4 more recently, and just switched back to
DOT5 again. If the seals are good it will not leak.
Barney Gaylord
1958 MGA with an attitude
http://www.ntsource.com/~barneymg
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