Explorer :: Fluid Squishing Around Master Cylinder After Brakes Bleed
Nov 5, 2010
I have a 1999 Ford Explorer Sport 4.0 SOHC.
I change the rotor, calipers, and pads on the front end.
When I went to bleed the brakes I got some fluid, then I got none.
I can hear fluid squishing around up near the master cylinder, but none coming to the caliper.
I see a bleeder screw on the master cylinder.
Before the car came to me the person had, had low fluid, but had brakes. Now the pedal just goes all the way to the floor with no effort.
There are no leaks or broken lines anywhere.
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While searching here for information on changing the brake fluid, I came across a thread that stated: You need a Lexus scan tool to bleed the brakes properly. I've bled brakes and other cars without having a scan tool. I've never bled the brakes on my 09 ES350.
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My driver side caliper will not bleed fluid, is it safe to say that the caliper needs replacing.
2000 f 150 4.2 v6 232,000 miles
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Early 70's Ford truck. The brake MC fluid is filled but not overfilled, and doesn't leak at all when the truck is parked. It can sit there for a month and never leak a drop, parked. But when I drive the truck, even just around the block, then park, and look inside the engine compartment immediately the brake MC is dripping brake fluid. It appears the leaking mode is by the fluid somehow jumping up and coming over the top edge of the MC when the truck is in motion or when the brakes are applied. All my diy'er years of replacing brake master cylinders on Ford Galaxies, VW Rabbits, Corollas, and this truck, I've never seen this kind of weird brake problem before. On this MC design it seems there's sort of a rubber baffle inside the lid of the MC, and that's present and accounted for.
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My 2003 Toyota 4 Runner with 104K miles recently started showing a brake light off and on. The brake fluid reservoir was at the minimum level and there was some residue leaking from the bottom near a silver disc. Took it to a mechanic and was told it was most likely the master cylinder leaking brake fluid. Is this normal wear and tear or is it unusual in this vintage vehicle? I do not notice any brake slippage at this point. Should I take this to the dealer and ask why this master cylinder is faulty? I thought Toyotas were long life vehicles?
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I've got an o2 camry with 150K that seems to be losing brake fluid from the "right" side of the reservoir. Which brake lines are supplied by the "right" half of the master cylinder reservoir? I have read that they could be diagonally piped.
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I'm getting ready to work on a 2000 Pontiac Sunfire for a co-worker. They told me that brake fluid leaks out where the fluid reservoir attaches to the master cylinder. Could that be a bad master cylinder or something with the brake booster? It looks like there is a lot of sludge in the reservoir.
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put new master cylinder and bled brakes in 1978 jeep cj5 and now fluid is being forced out the rear brake reservoir in the master cylinder, if lid is off there is about a 1inch fountain of fluid that shoots up.
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I recently noticed that my brake fluid was leaking in my 2003 Hyundai Elantra and upon further inspection I found the leak was coming from a part near the master cylinder. I looked online and couldn't figure out if this part was part of the master cylinder or brake line or a part all on its own. I tried tightening it but It still leaks some. I read a similar post online and that it could just be that the washer needs replaced but I just wanted to check on here to see what the part is called and if I should just replace the whole thing. I included photos as well.
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Lost braking power. Replaced master cylinder. Brakes went soft again. Shop says it is something to do with the ABS Control Unit (?). Took it to dealer who said it is a leaking master cylinder. Back to shop which claims nothing wrong with new master cylinder and it i the ABS blah blah. Dealer says it can't be ABS. Went to another shop. Replaced master cylinder again. Brakes still soft. No one can figure this out and I am stuck with very soft brakes.
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Yesterday the brake warning light came on in my 13 350. I checked, and the fluid level in the master cylinder was at the "min" line. I don't think I've ever had to had brake fluid in any car before. Seems to be Ok today, but I was wondering if other folks have had this happen? Of course if it happens again I'll have to check the brake system. Just wanted to check.
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I have replaced the cruise control cut off switch and post-recall pig tail twice in two years for fluid leaks. Whats the deal do they all leak?
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I have a 2004 Camry LE with 214,000 miles on the clock, and this car has had needed maintenance pertaining to the braking system ever since I bought it in January. Let me give you some background on past issues/maintenance before I dive into my current issue.
During the test drive, the brake pedal felt extremely soft/spongy, having to travel a lot farther than any other car I've driven (even my father's full size pickup had stronger brakes). My dad dismissed it just being the way the car was. In hindsight I would've walked away or slept on it, but let's just say I was pressured into buying the car right away.
We took it to my trusted local mechanic a few days later for an overall inspection, and he said the front brakes/rotors needed to be replaced. He said the rear brakes were thin, but could be replaced later down the line. So we replaced the front ones, expecting it to have some improvement. In reality, the brake pedal force was still the same as before.
A few months later, after hearing faint squeaking coming from the rear brakes, the brake light started to illuminate intermittently. That's when we decided to replace the rear brakes/rotors. After we replaced the rear brakes, braking motion was dramatically improved, and I did not have to push the pedal very far to achieve adequate braking power. It was great,while it lasted.
It gradually started to go back to the way it was, which is really disappointing. After growing tired of the problems, I decided to check the brake fluid level in the reservoir, and it was practically at the minimum line! Figuring it was a brake line or master cylinder leak, we took it again to my mechanic to have him inspect the braking system. Much to everyone's surprise (including my mechanic), there were no leaks to be found and he told me to come back if it gets worse or the brake light comes on. HOWEVER, when I drove it home from the mechanic, the brakes felt the way they did when he put the rear rotors on. On the service record, it said he just looked for leaks and readjusted the rear rotors. This was about a month ago, or at 209,000 miles.
However, as before, the brakes slowly started to loose their "bite" again and sure enough, the master cylinder had lost fluid; albeit not as significant as before, but enough to require topping off. In addition, whenever I'm decelerating on the freeway (from let's say, 75-60 MPH), the wheel shakes as well. This wasn't really present before.
My patience is running thin with this car; we've easily spent half the value of the car on maintenance.
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Why the brake lines have 2 or 3 coils in them near the master cylinder? Makes it a real pain to work on anything down in that area. Always snags ratchets and stuff...
My brother and I were discussing it the other nite, and the conclusion we came up with was, the first guy ever who was installing a brake system had tubing that was a couple feet too long, and couldn't find a tubing cutter, so he coiled them up.
Then the next guy saw that and figured "hmm, so THAT'S how it's done", and so on... Kinda like the story about the lady who always cut off both ends of her ham before she put it in the broiler..
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I have a '53 Ford F100. I have a PB conversion kit on it. The master cylinder & Booster are under the floor. I have used this setup for many years. Recently my master cylinder went bad. I replaced it with the same model. I bench bled it, and installed it. I also added a remote fill kit, since it's difficult to check & fill. Because of the booster, the master cylinder no longer sits under the hatch in the floor.
I got everything installed & connected, then bled all 4 wheels using a bleeder kit with an electric vacuum pump. The fluid runs clear & no bubbles, but I can't get a pedal by pumping. I have no leaks. I tried with the engine off, and running. I have felt soft pedals before, but I have no pedal at all, it just goes to the floor.
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I was wondering if there was how to on doing the MC replacement? The brake pedal goes to the floor almost every time you press on the brake?
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I have power steering fluid leaking out of the bottom of the Brake master cylinder out of a round hole. Every time I pushed brakes it leaks a good amount of power steering fluid out. Why it would do this and is there a screw missing out of the hole or what?
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Just wanted to report another F150 with the blown master cylinder problem and had a few questions regarding the issue. Its a 2014 Screw EcoBoost with about 12500 miles located in Michigan.
I was driving last Friday (6/19) when the low brake fluid dash lamp illuminated. I made it to my final destination, when I began to back into a parking spot the brake pedal dropped to a position about an inch off the floor. Parked the truck and popped the hood to find almost all of the fluid gone. Only having fluid in the rear axle reservoir of the brake circuit. Pulled the vacuum sensor and the booster is filled with fluid..
Called Ford, had it towed to the dealer and its been sitting there ever since.... They have no loaners and have not even looked at it yet. I'm going to assume no parts are in stock just like all of the other threads I have read on here about this issue.
A few questions I have for those of you who have had this problem or have knowledge about it.
1. How long did it take for your truck to be repaired?
2. When the master cylinder seal leaks all of the fluid into the booster and the booster is pulling engine vacuum; does this mean that brake fluid is then pulled into the crankcase of the engine?
Really looking to get my truck back soon cause I love driving it! But the '74 F250 will have to do for now ....
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I have a 79 f150. I changed two brake lines and master cylinder and bleed,and more bleed,but still very soft all most to floor? wheel cylinders look good.
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1987 F-350 460 Auto Trans. Brake Pedal slowly going to the floor. Stopped at a red light yesterday on a slight down hill and I noticed the brake pedal slowly going to the floor. I had to put the truck in Park to avoid bumping into the car in front of me. I checked brake fluid level and still at the full level, check rims for brake fluid leak from brake cylinder, none. Could my master cyclinder need rebuilding or is my vacume diaphragm going. Not sure thats what its called.
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I replaced the master cylinder 2 months ago and now every now and then the rear lock up for a second. its only happened a couple of times. Pulled the wheels and everything is in place with nominal wear with clean drums and rotors. Am at a loss as to why this is happening.
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