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
414-416-0790