Quote:
"I don't subscribe to the theory that if it usually breaks, it's probably broken. I find out what and why before replacing parts."

This seems sarcastic and serves no purpose here. You suggest changing the dis block without knowing it's broken????

Quote;
"The pedal was low because there was no pressure to the front wheel cylinders".


I read it that there was no pedal at all. Big difference for the trouble shooter.


So, you are saying the shuttle moved over and stuck? The block, as I see it, can either have the front brake passage open, blocked or partially blocked.
Open: Normal operation
Closed: Hard pedal
Partially blocked: Not much change to speak of.

That's the way the block was designed. It was purposefully designed so that if the sludge made the piston stick you would not loose your brakes. Your post on the foreign car block sums this up. They do not even recommend replacing the block unless there was leakage at the switch. Where did the step go where you look for a leak at the switch? I think it's probably very common to have the sludge in the block. A good flush would solve it. Sounds like this block had a very good flush before the said problem occured.

I'm skeptical and this is all BS! Just take a look at the block. Why sit here and type all day when a cursory inspection of the block, which I can't believe wasn't done, will answer the question.

It all boils down to, "Where did the hydraulic pressure exerted by the master cylinder go???? There is no loop in the system. We are taking about MASS AMOUNTS OF AIR! Where did the mass amounts of air come from so quickly. Most definitely not from the block...