daverclasper Posted January 13, 2019 Report Share Posted January 13, 2019 Hi. Think this maybe a rear brake cylinder sticking a bit until has more pressure?. Cylinders are only a couple of years old and car is used regularly though. Anything else to look for please?. Thanks, Dave Link to comment Share on other sites More sharing options...
Andrew Posted January 13, 2019 Report Share Posted January 13, 2019 Hi Dave i had exactly the same symptoms as you are describing. Yes you are in the right area. My off side rear wheel cylinder seized up in the expanded position and just like you the cylinders were only three years old. What the thumping noise is is the cylinders slipping on the back plate as it should trying to stop the car. It was a quick fix two new cylinders as problem solved. regards andrew Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 14, 2019 Report Share Posted January 14, 2019 There's another thread in the forum on worn backplates, where the handbrake lever has worn a groove into the backplate and presumably this means the cylinder will have to negotiate this before moving; check yours to see if any wear is causing stickiness. Link to comment Share on other sites More sharing options...
daverclasper Posted March 1, 2019 Author Report Share Posted March 1, 2019 Hi. Well finally got around to stripping the rear brakes. Cylinders don't appear to be sticking, with a bit of pedal pressure, though one side was weeping a bit, so new ones on the way. Yes Colin, there is a bit of brake plate groove wear, more so on one side. No welder to fill these, so have just smoothed off wear edges with a mini dremel thing so cylinders should slide easier. I did notice that the lever pivot pins sit in the cylinder channel, a bit proud of the slide surface and assume this promotes the groove wear and the thumping. I think I read a thread ages ago on CT where Bill Davis reckoned it was common with modern cylinders and to dress down the channel a bit so the pin is flush. Think I will give this a go, if the new cylinders are the same. What do you think?. Cheers, Dave Link to comment Share on other sites More sharing options...
dave.vitesse Posted March 1, 2019 Report Share Posted March 1, 2019 Hello Dave, Just a thought. I would also check the axle/hub nut is torqued up. Around 100lb. Dave Link to comment Share on other sites More sharing options...
daverclasper Posted March 3, 2019 Author Report Share Posted March 3, 2019 Thanks Dave. Will do. In the past I've used copper grease between cylinders and brake plate to aid sliding. Would normal grease be better?. Dave Link to comment Share on other sites More sharing options...
dave.vitesse Posted March 3, 2019 Report Share Posted March 3, 2019 I use copper grease as well, no probs. Dave Link to comment Share on other sites More sharing options...
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