Mark71

I installed a new MC, booster, combo valve and stainless steel lines about a year ago now. Everything's been great, up until recently.

There's a small leak at the pin on the combo valve (under the dust cover, opposite end from the output for the rear brakes). I've read a lot about those aftermarket GM-style prop valves leaking from under the dust cover.

So I have two options:
1) A new GM-style prop valve.
2) A new adjustable prop valve.

I would rather not re-bend the lines and my flaring tool will not flare SS. Anyone know of an adjustable type of prop valve that has the GM-shape?

Also, does anyone know what the GM-style prop valves are configured for pressure-wise? Is it like 60/40 front bias or...?

Thanks!

Boldsmobile

You have a third option. Have it rebuilt.

joe_padavano

Beat me to it. The prop valve seals are just o-rings. You can do this yourself.

Mark71

Ok... I thought those were sealed units. Mine is aftermarket, actually pretty new. Assuming I can rebuild it - any idea where i could get the rebuild parts? I guess I just need the seals...