i cant seem to locate the source of a leak on my 63 wildcat,i rebuilt all the wheel cylinders,and inspected all the lines,no leak that i can see,the only part i havent rebuilt or replaced id the master cylinder,but there isnt any fluid around it that i can see-any ideas of what i can check?ou:
How much fluid are you losing? If there is an external leak, it would have to be wet somewhere under the car. Check the back of the master where it bolts to the firewall or power booster.
well after i got into the shop last night,the master cylinder was damn near empty,so i filled it with fluid,and started the car-a whole bunch of smoke from the exahust? so i pulled the line off the booster,and it had fluid in it!must be the master is leaking into the booster?then it is burning off in the engine?
Sounds like your brake fluid is being consumed by your engine, via the vacuum brake booster line to the intake manifold. Time to take the master cyl. off and rebuild it or replace it. Don't forget to get the rest of the fluid out of your booster canister. There is more than likely a puddle of brake fluid in the bottom of it. I know this from personal experience. ou: Good luck. John Biggs.
how can i get the fluid out of the booster?i was thinking of using a small hand held vaccum pump,like i siphon kerrossene and gas with?
intresting, wouldn't the check valve on the booster line stop that??? About it being bad who knows for sure, anytime someone has said they got the boosted tied into the PCV with no check valve and I say it not good to be sucking gases from the PCV port I get a slew of responses why it doesn't matter, it never faild for them and so on..... Though I too have a mystery leak I cannot find.
I would change the booster as well. If it's the original booster, think about how old it is. The diaphram will get old and deteriorate with time, not to mention the good chance that it's contaminated. Think of it as preventative maintenance. Not much fun getting your master cyl. on there and then finding out the booster is or is about to go bad. Wasted time with that. I would replace them both if I were you. John. :TU:
i guess ill replace them both at the same time,i have a rebuild kit from napa for the master cylinder,so ill probably tackle that this weekend,a booster should be here soon,i ll have to go online and find one
The check valve actually allows the engine to suck in from the booster. It then closes and holds a vacuum inside the booster that's why when you turn the car off you will have one or 2 pumps left with the assist working. It's the residual vacuum inside the booster. The booster should not be connected to PCV but the intake manifold vacuum. Your not going to get much vacuum from the PCV circuit if any.
I didn't say I do that. search and you will find post of those who do. When they do it they T into the back of the carb and use both for booster and PCV. The chances of sucking oily dirty gases into the pricy PITA to change booster are not good for it.
how hard is it to change the booster?and is there a rebuild kit available somewhere or do i need to buy a reman/new one?
How hard can depend on the car. When I was messing with mine in my Firebird it was slow going at first, getting to the bolts under the dash. But when I found out the used one I bought was also bad GRRRRRR I was able to change it awful quick. The master cylinder should move out of the way with out removing the brake lines if your careful not to bend or kink them. But you will be changing that too right? I too thought of rebuilding it. And I did take my old one apart and found there are very few parts inside of them. If you could get parts, it should be easy. You could also then paint or have the old one coated real easy. Just note when taking it apart it will fly apart if not careful, big spring inside of it that will launch parts. If you look at the edges of the case its sort of a slip lock fit like a sending unit on a gas tank. I got pics of the dis/assembly of one somewhere. I can find em if you want.
As nate said, there is nothing getting sucked into the booster. Its connected to vacuum, not pressure. The check valve merely holds the vacuum in the booster.
i can find the master rebuild kit,already ordered it,what i was wondering is if there is a way to rebuild the booster and where to find the stuff to do so?
I don't know where you get a booster parts kit, if I did I would have done it myself. Though the parts have to be out there and there is little to wear out. But the folks who reman them get parts from somewhere.
