Walt,
Do Jim a favor, A1 Cardon rebuilds almost everything in the world for
everyone and nothing I think Is checked out. That's why I try not to sell
rebuilt critical parts as long as new ones are available at reasonable
prices. See If Napa or Pep Boys or AutoZone has a new one. It will be
worth
it in the long run. I've never had a new one fail and even if you get a
rebuilt one to work, the question is how long. My new ones are $119.00 for
comparison.
John Hervey
-----Original Message-----
From: Walter Coe [mailto:Whalt@xxxxxxx]
Sent: Tuesday, December 30, 2003 11:41 PM
To: DMCForum
Subject: [DMCForum] Urgent brake problem
I just replaced the master cylinder on Jim Sleeth's car, and
it don't work. Jim bought a rebuilt master cylinder from
NAPA. We bench bled it, connected the lines, bled the
calipers in the proper order, etc. Everything looks normal,
no fluid leaking anywhere. If we let the system sit for
more than 15 seconds and then step on the pedal, it almost
goes to the floor. With about 3 more pumps, it firms up
properly and stays firm for as long as we continue to pump
it. But if we let it sit for more than 15 seconds then the
pedal goes soft again. Apparently we just got a bad
cylinder from NAPA. The original cylinder was leaking, so
that was the reason for getting into it.
Can anyone say what could possibly be wrong in a master
cylinder to cause this? Or could we be overlooking
something else? I don't see how trapped air could cause
this symptom. We bled the system by the good old-fashioned
two person way. Jim pumped the pedal while I turned the
bleed screws. We used up two pints of Castrol GTLMA dot 4
because we wanted to thoroughly flush out some Dot 3 he
dumped in there to make the car temporarily drivable (after
the reservoir went dry due to the old leaky master). The
Dot 3 never touched the new master. If it caused a problem
in the calipers, I suppose they would hang up or leak. But
it isn't doing this.
Walt
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