Re: Losing brake pressure....Sometimes???

[jtrealty@xxxx]

First and most important make sure your emergency brake is adjusted 
and working properly! Next flush and bleed the brake system with DOT 4 
Castrol GTLMA brake fluid. If the trouble happens again rebuild or 
replace the master cylinder and it would be a good idea to also 
rebuild all of the calipers as the contaminated fluid will probably 
cause them to leak too! This could be caused by water in the brake 
fluid and when it gets hot it turns into steam (a compressible gas) 
and then the pedal falls away. Water in the brake fluid is VERY BAD as 
it corrodes the insides of your brake system. If it was air then it 
would be more consistant.
David Teitelbaum
vin 10757


-- In dmcnews@xxxx, Felix S <melvnhel@xxxx> wrote:
> Hello List,
> 
> Another problem which is kind of scary, I seem to be losing 
brake
> pressure when I am at a stop light or pulling out of my driveway. 
Pressure
> I mean the car is stopped then I feel the pedal move, all the way 
down to
> the floor, I pump it and the pressure is back. I would think Master
> cylinder etc. but here is the funny part. It happens only sometimes
> (haven't seen a pattern yet), the day could be super hot or cold 
doesn't
> matter, there is no leaking brake fluid anywhere, the fluid is 
always full.
> Someone once told me that I had air in my system, maybe but that's 
kind of
> weird. Or an internally bleeding brake master cylinder, so I can't 
see the
> leak? I first noticed this during a parade and we were going stop 
and go up
> a steep incline for a while and then stop and go all the way down, 
and
> that's when I noticed it. Anyone had a similar incident before?
> Suggestions?
> 
> Thanks in advance
> 
> Felix