I have a '99 Silverado 250 with a leak between the brake reservoir and the master cyl. Mechanics tell me there is no gasket. How can I get it to stop leaking?
View 12 RepliesEarly 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.
View 17 RepliesI'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.
View 14 RepliesI'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.
View 8 Repliesput 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.
View 7 RepliesI 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.
View 7 RepliesI 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?
View 6 RepliesOur 2002 LE Camry master-cylinder reservoir is loose, at least with the engine not running. Is this normal? It moves about 1/4", side-to-side. With the engine running, the pedal almost goes to the floor, but I've been told that's normal. I'm not sure that it is, but my wife seems to get by with it that way. Our engine is 4cyl.
View 4 Repliesmy 2000 f550 master cylinder reservoir plastic is cracked from vibration and it would be good to know if it can be replaced separately than having to purchase a new complete unit.
View 2 RepliesThere is an air leak and hissing sound at the connection of the master cylinder to the brake booster. Brake pedal travels nearly to the floorboard before engaging the brake. What is the problem and how can I fix it myself? (Special note: the brake fluid was very low and is now topped off to the maximum level . Adding the brake fluid caused very little change to the brake pedal travel.)
View 5 RepliesWhich line goes to front brakes and which to rear from the master cylinder?
View 1 RepliesI had this sad puppy noise coming from my brakes so I have now replaced my brake booster. When doing so I took my old brake master cylinder and put it on my new brake booster. When trying to bench bleed it it only came fluid from the P marked circuit. It came no fluid from "S". I guess it stands for primary and secondary.
I thought it was because I couldn't press the piston hard enough so I installed it in the car so I could use the brake pedal to get more power. But still no fluid from "S". Is the brake master cylinder faulty? The rear discs are unevenly worn.
I replaced my MC cap and gasket less than a year ago with a Dorman replacement and I'm leaking again, already. I don't want this to be an annual thing! Any good quality replacement? Is there any tip or trick to get the gasket to seal better?
View 9 RepliesI have leased my 2012 prius since April 2012 and about a year ago I began to notice the following noise originating from the master cylinder/ABS unit. The noise happens if I push the pedal firmly to the floor and occasionally during regular braking. The braking system seems to be working fine and regen braking is functional. I am wondering if this noise is a sign of an imminent failure.
Listen to audio recording....
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?
View 2 Replies92 Regal Custom, 3.8L .... I need to replace master cylinder on mother in laws car. How do I determine if it has the Durastop brake system or not?? Any factory code in glove box or trunk, if so what is the code to look for?
View 2 RepliesComing out the piece right behind the oil reservoir out a little hole whats this leak coming from...
View 6 RepliesJust purchased a 2003 GX470 with 160k and after the low brake fluid light came on I noticed the master cylinder had a leak. After removing the cover it appears the fluid has leaked for quite some time as the paint has started pealing from the frame. The brakes however appear to be working correctly. Upon purchase the front calipers were seized and I replaced both front calipers.
After having someone depress the brake pedal while I watched, the fluid leaks from the end of the master cylinder each time pedal is pressed in.
After doing some research it appears there is a rebuild kit for the master cylinder.
I recently bought a 2004 GX 470 with 89k miles. My dad did the 90k service like a champ and it runs very smoothly. However, I have recently noticed what I believe to be the brake master cylinder, which on a regular basis, has to keep compressing for about 4-6 seconds even while driving. We filled the fluid and it seemed to stop as I was pumping the brakes to test. But the next day it started again and the fluid is still at MAX level.
View 4 RepliesSo my May 2007 V6 Sonata with 143,000 km (89k miles) had the red parking brake light come on. Master cylinder level was low and there was evidence of something leaking on the driveway. Below the very back of the driver seat.
At the dealership they say I've got a leak in my brake lines. Say that the fuel lines should be replaced too since they are in the same compartment. So if one goes the other may not be far behind.
I was out of town and the car couldn't be driven safely so I was pretty much stuck there.When the dealership did the work a rusted bolt snapped near the fuel tank and they said that added an additional hour of labour to the work. In the end I wasn't charged for it. Tech said he had never seen a Sonata have the brake lines rust out like that. I got the brake and fuel lines done cause I plan on owning it for 6+ years.
...Is there anything special that needs to be done for brake bleeding after putting in a new master cylinder? I decided today to flush my system with my vacuum bleeder and now my pedal slowly falls to the floor at a light...No problems in a panic stop or otherwise, just falls to the floor slowly when braking...no leaks, so I'm assuming a master cylinder is an order....
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