ksschraml
Well-known member
- Joined
- Jul 14, 2011
- Messages
- 57
- Reaction score
- 0
- Location
- Kansas City
- My Car
- 73 Mach 1 351 2v
68 Firebird 455 4bbl
+1 ::thumb::Yep...had the same problem. It is not the switch that is leaking but your proportioning valve. You need a rebuild kit from... https://www.musclecarresearch.com/valve-kit-kh
I installed the kit on mine and leak went away.
I did the kit and now mine is leaking at this spot. ? Does that mean I am too incompetent to rebuild a proportioning valve?Thanks, that is what I was afraid of.
With the new seal kit is there any chance this will go away with a few cycles of the brake system/pedal, or do I need to just buy one of the Daniel Carpenter reproductions that are out now?Brake fluid is leaking past the O-ring seals on the ends of the piston in the center bore of the proportioning unit.
I tried to follow all the rebuild instructions, and I did go for the centering tool. I am converting mine to disk, I decided to rebuild because it was leaking out of the bottom. Now that that part is sealed it is leaking through the switch!!!I rebuilt the distribution valve on my 69 and there is no leakage (there wasn't any to begin with) so rebuilding it will not hurt it. I think new O ring seals should work unless you have damage to the bore. Rebuild kits are cheap so it's probably the way to begin. BTW - be sure to get the 'Centering Tool' which is helpful during the bleeding process.
I tried to follow all the rebuild instructions, and I did go for the centering tool. I am converting mine to disk, I decided to rebuild because it was leaking out of the bottom. Now that that part is sealed it is leaking through the switch!!!I rebuilt the distribution valve on my 69 and there is no leakage (there wasn't any to begin with) so rebuilding it will not hurt it. I think new O ring seals should work unless you have damage to the bore. Rebuild kits are cheap so it's probably the way to begin. BTW - be sure to get the 'Centering Tool' which is helpful during the bleeding process.
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