Re: [Chrysler300] Help Joe out

[Ray Jones <hurst300@xxxxxxxxxxx>]

Bottom line is that Millions of cars have been produced with the Master 
Cyl near the edge of the Exhaust System and it's not a known problem. 
So..... look harder. A heat shield would work but only hides the real 
problem. The heat is getting to the Master from somewhere. It could 
even be that the Engine is getting very hot in that area and not 
showing it on the Temp Gauge since the sender is near the front of the 
Engine and the water flow is OK there.

If all else fails, buy or borrow a Temp Gun which can read the temps 
without touching. Not very pricy nowadays, and a good investment. Then 
try to duplicate the problem. Let it sit in the driveway on a hot day, 
idling, and take readings on both sides of the engine, each Cyl, each 
exhaust Manifold, the Master Cyl, Brake lines and Rad. and so forth. 
See if it gets super hot in one area over the others. Record the 
numbers and watch for a drastic change.

Water flow, Air flow and Exhaust flow, all can play a part. It could 
even be the idle mixture/circuits causing the back Cyls to get extra 
hot at idle but off idle OK.

Don't ya love a mystery??? Ray

On Jul 12, 2005, at 8:24 PM, John J. Hertog wrote:

> Hi Jim Eckert,
>
>  Your answer is the one that has made the most sense so far;Â that is 
> because
>  you personally experienced the exact same symptom as Joe Luciano . 
> Namely,
>  the broiling hot master cylinder after sitting in a traffic jam on a 
> very
>  hot day.
>
>  Have you ever attempted to touch the master cylinder again, after 
> being
>  stuck in traffic on a hot day? I find it 'weird" that a master 
> cylinder
>  would get that hot, even under those conditions...
>
>  By the way, Joe report that there are no exhaust leaks anywhere, and 
> there
>  are no brake lines anywhere near the exhaust system, everything is 
> stock..
>
>  John Hertog
>
>
>
>
>  ----- Original Message -----
>  From: <REckert300@xxxxxxx>
>  To: <chrysler300@xxxxxxxxxxxxxxx>
>  Sent: Tuesday, July 12, 2005 1:09 PM
>  Subject: [Chrysler300] Re: Help Joe out
>
>
>  >I experienced the same problem that Joe did, under the same 
> conditions. I
>  > was driving to Carlisle on a very hot day when we were directed to 
> exit
>  > the PA
>  > Turnpike due to an accident between interchanges. Traffic was 
> backed up
>  > and
>  > just barely creeping along. As I exited on the ramp, I discovered 
> that I
>  > had no
>  > brakes. I was able to pull the car off to the side of the ramp. 
> Since
>  > all
>  > of the brakes had just been completely rebuilt, I was puzzled as to 
> what
>  > had
>  > caused the problem. I used the emergency brake to get stopped. 
> After
>  > thinking
>  > about the situation, I concluded that the brake fluid had boiled 
> and,
>  > therefore, wasn't operating. I could not touch the master cylinder
>  > without using
>  > gloves. I decided to wait about a half hour for the engine to cool 
> and
>  > then had
>  > some brake. I then pulled off the ramp and stopped at a restaurant 
> for
>  > lunch
>  > and to let the engine cool even more. After lunch everything was 
> okay and
>  > I
>  > finished the trip without incident. When I reached home, after the 
> show,
>  > I
>  > rebuilt the master cylinder, blew out the brake lines, and replaced 
> the
>  > brake
>  > fluid with synthetic brake fluid. I've had no problems since, 
> although I
>  > have
>  > found myself in the same weather conditions. My car does tend to 
> overheat
>  > easily when it is very hot and I have to drive slowly or stop in a 
> lineup.
>  > I then
>  > have trouble with the radiator overheating but I have never had 
> another
>  > problem with the brakes under those conditions. Hope this helps.
>  >
>  > Jim Eckert
>  >
>
>
>
>
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