Is it possible for a rear brake cylinder to leak and then stop leaking? I have not had any brake problems before and last night I parked on the drive and came out this morning to a nice size puddle of brake fluid coming from the pass. rear drum. Anyway, I filled the res. up, which was still almost half full and went off driving. The brakes worked fine, so I went home and let it sit half a day, and checked but had no puddles this time. Could wind chills of 0-10 degrees have caused it to leak, and when it warmed up to 53 today sealed the leak? a Couple of months ago, when changing the brakes, that cylinder had no leaks at all. Any ideas as to what happened?

 

How old are they?

 

Good question, I just bought the truck in January, Heard a noise in the left rear brake, so I thought I would put some new pads on. Opened it up but the pads were good, I had already purchased the pads, so I decided I would put the new on anyway. I didn;t replace the cylinders because the still looked and worked good.

 

Sometimes when the cylinders a pushed in slightly as when new shoes are installed there can be seepage. The cylinder will wear where most of the braking has happened over its life..then when reset for new brakes shoes it is not really a good seal and a leak ensues.

 

They are rebuildable. New or rebuilt aren't that expensive and it's a real easy job. Remember long-nose vise grips for those PITA springs. Make sure the pads are adjusted up so you have good pedal. If it was a clicking you were hearing check the weird perporsion valve attached to the rear axle if it has one.