Drum Brakes sticking when cold only.

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Slantsix64

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Hey guys I got an issue with my 67 the rear drums stick when the car is cold or after sitting for a day or too. I was thinking maybe I need to flush out my brake fluid? Might be too thick (dirty) or something what do you guys think?
 
How old are the flex brake lines? They will collapse with age, That makes the fluid easy to push through the line but not want to return because your foot is a hell of a lot stronger than those return springs.
 
Hey guys I got an issue with my 67 the rear drums stick when the car is cold or after sitting for a day or too. I was thinking maybe I need to flush out my brake fluid? Might be too thick (dirty) or something what do you guys think?

Usually that is a sign of a slave cylinder or axle seal leaking into the brakes.
 
Has the fluid been changed? Condensation is water and can freeze in the lines as well as the wheel cylinders. Frozen water expands and can push on the pistons applying the brake shoes. JMO
 
You may also want to check the rub pads where your shoes contact the backing plates. They can wear over time and cause the brakes to intermittently stick.
 
How old are the flex brake lines? They will collapse with age, That makes the fluid easy to push through the line but not want to return because your foot is a hell of a lot stronger than those return springs.
Hmm i had replaced the rear lines but with new ones i bent by hand maybe they are not bent like factory had it. i have to check that
 
Has the fluid been changed? Condensation is water and can freeze in the lines as well as the wheel cylinders. Frozen water expands and can push on the pistons applying the brake shoes. JMO
Yes it had but before i did the car had been sitting since 1986 might need to do another flush and clean out those wheel cylinders?
 
Hydraulic issues check for sure, but also post #5 is an excellent point. The backing plates have flat pads on them where the shoe frames make contact with the backing plate. Sometimes when people replace the shoes, they don't know or forget to put some grease on those pads. I use a brake grease product that's ceramic based nade by Permatex and very high temperature and impervious to water, so it's not going to go anywhere.

https://www.amazon.com/dp/B0018PSASU/?tag=fabo03-20
 
Thanks for the replies the problem has been fixed I believe it was two issues, one the fluid was very dirty when flushing out the lines and cylinders I used a compressor to blow the lines out and man what a difference. One line from the master cylinder was like a clogged artery! Now I can lightly step on the brakes and I slow down , before I had to stomp on it and cross my fingers! Thanks again guys.
 
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