RE: [Chrysler300] Mysteriously Losing Brake Fluid
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RE: [Chrysler300] Mysteriously Losing Brake Fluid

I have a 300 K with cross Ram that was losing fluid.  At this time I had already changed all the wheel cylinders and shoes with no external leaks. If the car sat for a month the master cylinder would be empty. When I removed the hydro vac booster under left front fender it was almost full of brake fluid. Had it rebuilt drove the car for 2 months before putting the car away for the winter, and over the winter the master cylinder was empty again. After checking I found out the master cylinder was leaking fluid too. I replaced it now after driving over the summer no more leaks now next spring I will flush the system an install silicon brake fluid. That should eliminate any other problems with the brakes.

Mel. Stoltzman


From: Chrysler300@xxxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of mark schueller heminwedge@xxxxxxxxx [Chrysler300]
Sent: Tuesday, November 06, 2018 2:26 PM
To: Chrysler 300 Club Int.
Subject: [Chrysler300] Mysteriously Losing Brake Fluid



Greetings 300 Club Members:


MY 300C is mysteriously loosing brake fluid and I do not know how.  The only clue is that nasty black exhaust is coming out the tail pipes on both sides leaving heavy deposits on the garage floor.  What ever is happening is draining my master cylinder dry. Is it possible engine vacuum is sucking up the brake fluid some how? Is there a malfunctioning check valve some place?  There is no evidence of leaky wheel cylinders from under the car but I have not pulled the wheels off to see.  A number of years I did a brake upgrade and swapped out conventional brake shoes for rotors and was told I may have to go with a double action master cylinder but opted not to with many years of no problems until now.  This is a new problem and it is truly a mystery to me.


Any and all feedback is appreciated. Thank you all very much!


Mark Schueller

300C, F


1605 Lake Shore Road

Grafton, WI 53024




Posted by: "Melvin Stoltzman" <mlstoltzman@xxxxxxxxxxx>

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