[Vwdiesel] Weird brakes
jhsg at sasktel.net
Wed Jan 2 20:11:53 PST 2008
He recently put a new master
> cylinder and one new brake line on the car, and afterwards is when this
I would suspect that the rod length between the master cylinder and the
vacuum booster is incorrect. This is accomplished by not seating the
rod properly, or losing the o ring that goes between the two. What
happens is the cylinder stays just depressed a tad, and this keeps the
brake fluid from going back to the master cylinder like it does if your
foot was off the pedal in a normal situation. Now, the fluid heats up
in the brake line, particularly on the brake end, it gains volume, and
slowly applies more brake due to fluid expansion.
If this is not the case, then you have to look at the booster- the
vacuum valve may be leaking, holding the brakes on just a tad, as if you
had a partially depressed pedal. Maybe you could tell if freeplay in
the pedal diminishes a lot with vacuum on the system versus no vacuum on.
> My opinion is that the new master cylinder is somehow faulty, but I really
> don't know. This is a strange one that I haven't seen before. Does anyone
> else out there have any ideas?
That's doubtful Eric, but there is always a first.
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