Re: [Chrysler300] help Joe out

["langendorfer" <langendorfer@xxxxxxxxxxx>]

Any chance the line running downward from the Master to the distribution box
is a little close to the exhaust manifold or header pipe and transmitting
heat upward to the Master?

I can't think of anything else (and I would agree with John that the hard
pedal and no brakes thereafter is indicative of a bad master, even on
today's cars).

Keith

----- Original Message -----
From: "John J. Hertog" <crossram@xxxxxxxxxxxxx>
To: <chrysler300@xxxxxxxxxxxxxxx>
Sent: Monday, July 11, 2005 6:08 PM
Subject: [Chrysler300] help Joe out


> For the second time, Joe Luciano has lost his brakes - entirely - while
driving his '62 300 convertible.  This is getting both very annoying and
very dangerous. Can anyone help Joe ?  I personally have never encountered
the exact problem that he is experiencing, but perhaps one or more of you
have?
>
> The car is a '62 300 Sport convertible; it is using the original
single-reservoir mater cylinder. Up front, the brakes have been changed to
1964/1964 Bendix-type drum brakes from a 64 300  (that should not matter) .
Other than that, everything is stock.
>
> First time Joe lost his brakes, he was driving in heavy traffic on a hot
day, coming back from a show.  When he called me and described what happened
(pedal first got hard, then disappeared entirely, went right to the floor) ,
I (wrongly) assumed it was a bad master cylinder and told him to change it.
Which he did.
>
> Second time: same scenario, with the new master.  After driving the car
for a few hundred miles, from NYC to Carlisle PA  and back, with no
problems, Joe once again hit traffic, on a hot afternoon. After crawling
along for awhile, the pedal started to feel "funny"  and then, boom, no more
brakes at all.
>
> This time, however, Joe opened the hood, and noticed that the master
cylinder "looked" hot.  So he threw some water on it, and the water sizzled
off the master cylinder like it was an exhaust manifold.  And again and
again, just kept sizzling.
>
> So - I now assume (?) that the master cylinder is getting so hot that the
brake fluid starts to boil, and that is what is causing brake failure.
However - what I don't understand is, why is the master getting so hot?  I
mean, it's hot under the hood, but not THAT hot, and the engine is not
overheating, so why is his master cylinder getting so hot that it percolates
the brake fluid?   Been driving these cars for years, never seen that one
yet.  Anyone else?
>
> Looking forward to your repsonses,
>
> John Hertog
> Sag Harbor NY
>
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> [Non-text portions of this message have been removed]
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