FlashBuddy Posted March 25, 2018 Report Posted March 25, 2018 Puddles of brake fluid under both rears suggested I take a look in there. Look what I found. What an oily mess. I had questions... New brake cylinders, refurbish or sleeve? I bought new rear sets from Andy Bernbaum's Old Mopar Parts. YIKES! Brake fluid everywhere. It looks like the left top rear might be defective. Am I missing something? Ideas on stopping the leaking? Quote
NiftyFifty Posted March 25, 2018 Report Posted March 25, 2018 So it leaked between the brass fitting and the body of the cylinder, and not from the line fitting? Could be a bad copper washer...hopefully your shoes didn't get too contaminated with brake fluid Quote
FlashBuddy Posted March 25, 2018 Author Report Posted March 25, 2018 If you look close you may notice that the part was not machined where the copper washer can seat and seal. At least that was my take. Notice too that the washer has a kink across where it couldn't completely seat and seal. I wonder if JB Weld could act as a seat to seal against or as a seal itsself? Quote
Elwood Posted March 25, 2018 Report Posted March 25, 2018 1 hour ago, FlashBuddy said: If you look close you may notice that the part was not machined where the copper washer can seat and seal. At least that was my take. Notice too that the washer has a kink across where it couldn't completely seat and seal. I wonder if JB Weld could act as a seat to seal against or as a seal itsself? Don't mess around with JB Weld on an hydraulic brake fitting. Either replace that casting, or have it machined flat all around the copper washer sealing surface. And then use a NEW copper washer. 1 Quote
Dodgeb4ya Posted March 25, 2018 Report Posted March 25, 2018 (edited) More poorly made Chinese junk being sold. Edited March 25, 2018 by Dodgeb4ya Quote
NiftyFifty Posted March 25, 2018 Report Posted March 25, 2018 I would return for a new one, you paid for a supposedly working wheel cylinder, you shouldn’t have to invest more to make it work. I wouldn’t try any other repairs 1 Quote
FlashBuddy Posted March 25, 2018 Author Report Posted March 25, 2018 (edited) Thanks guys. I'll give Andy a call in the AM. Really wanted to get back on the road this weekend Another thought was to get the old ones sleeved. You can tell by the feel of them they are heavy duty; well, heavy for sure. Can any machine shop do that or do I need a specialist? Edited March 25, 2018 by FlashBuddy Quote
Bluzhog53 Posted March 25, 2018 Report Posted March 25, 2018 I agree that it was not completely machined right and neeeds to be returned to Andy. Did you get others you can compare to be sure? It sure looks like it was not done right and is leaking through the "rough" area. Quote
FlashBuddy Posted March 25, 2018 Author Report Posted March 25, 2018 Yeah, the other upper cylinder is machined clean to a nice mating surface. Hey, do you think that washer dent matters? Should I go out and buy a couple new copper washers? Quote
Elwood Posted March 25, 2018 Report Posted March 25, 2018 14 minutes ago, FlashBuddy said: Yeah, the other upper cylinder is machined clean to a nice mating surface. Hey, do you think that washer dent matters? Should I go out and buy a couple new copper washers? I never re-use copper brake line washers. If you want to anneal them, perhaps they could be re-used, but trying to get a used washer to seal again is not worth the risk. Brakes are too important to save a few dollars on a used washer. 1 1 Quote
Bingster Posted March 25, 2018 Report Posted March 25, 2018 From what I've read on here re-sleeving is the way to go. 2 Quote
JBNeal Posted March 25, 2018 Report Posted March 25, 2018 Re-sleeving can be a sound investment for years... 1 Quote
FlashBuddy Posted March 26, 2018 Author Report Posted March 26, 2018 Just got off the phone with Alex over at OldMoparts.com. Where's Andy?! He's shipping out a replacement Quote
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