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Old 07 Dec 2017, 04:40 pm
My02RedRide's Avatar
My02RedRide My02RedRide is offline
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Join Date: Jul 2011
Location: Rochester Hills, Michigan
Posts: 499
Default Re: Rear Wheel Cylinder Leaking and more

I would start off even though it might be a PITA is really inspect the bad wheel cylinder again. Perhaps try another supplier NAPA, what ever and different company that remaned the cylinder. Wheel cylinders are a very simple component ( a bore and 2 fitted brake fluid proof primary seals and 2 outer dust seals). Is it leaking very slightly or gushing out soaking the shoes?? You had replaced the same corner a couple times and they too leaked which is VERY unusual.. Brake tube going into the wheel cylinder is good and snugged tight? Saying this as to look closely to make sure no fluid leak at the flared end going into the wheel cyl. which may wick around to the inner part of the brake backing plate onto the shoes.

Ok now to the master. Bone Yard will be the best for the $$$. I think I paid $15 for mine and it had both prop valves. A little clean up and flush with some fresh brake fluid and was good to go. GET THE CORRECT YEAR master as the master rear piston are a bit different length wise. Time to remove: Remove the rubber hose going to the booster, you'll hear a woosh... booster vacuum is now gone (if you don't do this there is a chance the master piston may get sucked into the booster with fluid when removing the master from the booster). Remove the 4 brake tubes from the master a bit tight but use tube wrenches if you have them. Remove the 2 nuts that hold the master to the booster. The master will come right off. Install new used master and bleed the brakes all 4 corners. Right rear 1st, left rear 2nd, right front 3rd and left front last. FIRM pedal is what you want. R and R the master should take no more than a 1/2 hour.

I fought for months with the right rear overheating and warping 3 drums and was at wits end. I had bled mine 4 times and same over heat right rear only. Even my brake engineers were stumped. They never thought about the prop valves on mine HOLDING pressure when I release the brake pedal. Yours might be the opposite instead of limiting the pressure to the rears, yours is going full boat pressure and blowing the seals out. Typical brake balance is 70% front, 30% rear.

Last edited by My02RedRide; 07 Dec 2017 at 05:38 pm.
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