Now, I'm not a professional mechanic, though I play one on TV, but
this is a new one:
'81 TD. Master cylinder replacement. Done more than my share of them
on other cars. Never had a problem.
So, I put on the new cylinder after a bench bleed, stick the vac sucker
on the rear, left wheel nip, suck until no bubbles. Do the same to the
rear right.
Move to right front: the bubbles do not stop.
Remove and rebleed the MC.
Reinstall.
Bleed the back-no probs after about 2 cups of fluid.
Bleed to the front right: nonstop bubbles.
Pressurize the MC through the filler cap vent hole. Again the rears are
great.
Ran a whole quart of fluid through the front right and it never stopped
bubbling.
Removed the MC and re-bench bled. Noticed the rear, passenger side
fitting was sputtering fluid during the bench bleed when the others
were doing the fire hose thing.
For the life of me (quite literally, since these are the brakes) I
can't see where the air is getting in. My guess is the new MC is bad
and is sucking it in through the back.
Before I take the MC back I'm gonna get the good MC offa my wrecked
'83 DT and see if it does the same thing.
How'm I doin'?
Any comments appreciated. Thanks.