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Question
I have a '69 Javelin SST, 343 CID, auto with drum brakes. I cannot keep rear brakes on it. I can bleed them, and clean the valve body (proportioning valve?) and they will work for only a couple of weeks at the most. Is the problem the valve? I didn't think this did anything except on a car with disc brakes on the front and drum on the rear, but I don't know what else it could be. I have replaced booster & master cylinder before. there are no leaks.
What do you mean when you say cannot keep rear brakes on it?
Do the rear brakes not apply? Do they wear out? If they are not applying, how did you test them? Do you get a strong flow of fluid when you bleed the rear cylinders? If they don't apply, have you inspected the inside of the wheel cylinders for corossion? Please let me know. By the way, if you have 4 wheel drum brakes, your car does not have a proportioning valve, it probably has a pressure differential warning valve which turns on a light with a pressure loss in a line.
Kevin
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Kevin Pilotte
Expertise
I can answer many technical questions relating to AMC vehicles prior to 1979. I also have experience with Rambler & Nash vehicles.
Experience
I am a former AMC technician, service writer and service manager. I have worked in AMC dealers in Illinois in the 70's. After college, I was a Field Service Rep for American Motors Sales Corporation, working out of the Chicago Zone office. I traveled to AMC dealers assisting in the diagnosis and repair of AMC vehicles. I was also the Area Training Manager for DeLorean Motor Company. I have 10+ years as an Automotive Instructor. I have modified and restored
numerous AMC vehicles. I have been working on AMC vehicles for over 30 years.
Organizations
I have been an ASE Certified Master Technician since 1975. This includes L1. I am also currently a Toyota Certified Master Diagnostic Technician.
Publications
I have articles in "American Motoring", the official publication of the American Motors Owners Association. They are the largest AMC club in the world.
Education/Credentials
I have a certificate I printed out from a website.
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