Brakes sticking when cold

[fc227]

Greetings all,

I had the GN out today , It was cold below freezing. The brake pedal was sticking, anyone ever have water / Moisture on the Master cylinder push pedal ? It would be hard to push then break free. Slow to return too. Like the plunger is sticking

But I just took the car for another ride and it was warmed up and the problem is not there.

 

[salvageV6]

I've never noticed that with the powermaster or vacuum brakes here in CT.

And I drive mine all winter even in below 0 temps. we get sometimes.

 

[fc227]

It's been a while since I drove it. Like I said last night after the car was warm no problem. Tried it this morning 9° (f) they where sticking , much better than yesterday . But I left it home today.

 

[TurboBuRick]

When's the last time the fluid was changed? You could have ice. Brake fluid absorbs water/moisture at a rate of 2-3% per year. This process is magnified in more humid conditions. It's prolly the #1 most neglected fluid in all classic cars.

 

[fc227]

The brake side it self has been several year . The power master pump side about two years ago when I replaced the pump

 

[Chuck Leeper]

Some ap stores have a cheap test kit for water in the system. It's a strip that you dip in the fluid. The color change indicates presence of water....
here's one:
http://www.jegs.com/i/Phoenix+Syste...4&cadevice=c&gclid=CO-uwPOwlcoCFdcWgQodsH0PNQ