How to Fix Sinking Brake Pedal in Your Car (Brake Master Cylinder)
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- Brake pedal sinks. How to fix a brake pedal that sinks to the floor in your car, DIY with Scotty Kilmer. How to replace brake master cylinder in your car. How to fix sinking brake pedal by replacing the brake master cylinder. Brake master cylinder location, diagnosis, removal and repair. DIY car repair with Scotty Kilmer, an auto mechanic for the last 49 years.
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6. Common Sense
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8. Mini Microphone: amzn.to/2newgV9
9. My computer for editing / uploading: amzn.to/2i2sKYz
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Scotty Kilmer why does my accelerator stick!!! (I almost died)
honestly , scotty you are a real hero when it comes to helping people fix cars , god bless you
thanks for the support!
Scotty Kilmer hi my brakes are acting strange when I turn the car off the brake pedal goes hard automatically without me pushing it down a few times and I turned the car off with my foot on the brake and the brake returned to it's normal place forcing my foot up and going solid as a rock do you have any idea what is happening any help would be much appreciated.
Thanks in advance.
Hey Scott I have that issue I have 02 Nissan Maxima
I love how Scotty made 3 master brake cylinder replacement videos, on three different cars. Wow, work ethic, respect!
its called money making!
@@jimw7916 exactly
@3:24 HOLY REDLINE, BATMAN ;)
Steve Kilpatrick he know what he's doing
Steve Kilpatrick holy shit!!
Nothin' like crusing down the street doing 30 MPH @9000 RPM.
looks fine to me
He went beyong the redline
I see a lot of mixed emotions on how people feel about ol Scotty here. But c'mon. This dude gets results. Alone. No excuses. Just ways to figure stuff out alone and in a pinch. Thank you Scotty for many unfixable fixs. Jammed up and alone.
Thank you, Scotty. Thanks to you, I am able to do a lot more of my own car maintenance than I would be without your instruction.
This particular episode has a lot of the trademark Scotty Kilmer grunts. :D Thanks for the videos, I always enjoy them.
2:52 was my favorite
Scotty! I did your trick when I changed my master cylinder and it worked very well! Thank you! 1980 Mercedes 450SL.
Now the booster is bad.... 6 months later. A good mechanic would have replaced the booster (since it is 38 years old!!!) 'while it was apart'. I knew about that, but was trying to save the expense. No big deal, I'll bleed the master just like last time, no sweat, thanks to your method!
good tip on the ABS being a potential culprit for internal leaks.
Its amazing how you can explain a job like that so quickly. If you didn't live 4600 miles away I would press your brake pedal down for you, and i will comment again as soon as i get back from my Mediterranean cruise.
charles mclachlan So, you're still cruisin after 3 weeks? Lmao
Boat must've sank
Hey Scotty, do your neighbors ever get cranky about you squealing your tires and slammin on your breaks down your street?
Stephen Van Roekel He fix their cars for free...
Stephen Van Roekel he does it once, then replays the same video on all his videos.
Stephen Van Roekel one video he was shooting guns while doing a burn out while drinking a beer
Donald J. Trump i even seen one video he was doing a burn out shooting mexicans the bird while he was drinking a beer and smoking a joint with a confederate flag behind the car
lol no cause he's a mechanic,they probably pay him to fix their cars
Literally the problem with my car at this exact moment, you're a bloody legend Scotty keep it up!
try and bleed the brakes first
will do cheers!
Do you consider this your lucky day?
Kelly Medley.., Scotty is what's known as a, "Living Legend!"
@@BluntAnims Hey it's been two years, have you got the problem solved successfully? My brake pedal keeps going in when I put pressure on it. I've never had any problem with the braking though, so not really sure if it's something that need to be solved immediately. Thanks for any help : -)
I would also make sure that the calipers can bleed. I must have crimped one of my rubber lines and thought the pedal was sinking because of the MC due to no leaks. $200 later still had the same problem and it turned out it was a 30 min job that costed me $20.
If I have this problem do I need to bleed both the master and the calipers?!
It worked Scotty!! many thanks from scotland,i was just about to tow the car to the garage,watched your vid after replacing a whole brake line and wouldnt bleed,did exactly what you said with the missies pumping the pedal instead of that giant screwdriver lol,it instantly worked,cant thank you enough thankyou saved me at least 50 pounds about $80
Often when you have a sinking pedal from an internal master cylinder leak it will hold if you push hard on the pedal, but sink with moderate pedal pressure. I assume its because the seal under heavy pressure will expand outward against the wall. That kinda verifies it's inside the master cylinder as long as there are no external leaks to be found.
Followed your directions here. There is one step that needs to be added when working on a 1998 Toyota Camry. Here it is: Before prying up the brake fluid reserve, be sure to unscrew it; there is one screw holding it on.
Scotty you're a life saver! I had to pull my master cylinder because I accidentally poured some power steering in to the reservoir. I sucked it out right away but I also used this video to pull the master cylinder and flush it out with clean brake fluid. The instructions on reinstalling and purging air from the Master Cylinder worked like a charm!
The reservoir is loose @2:24 there is a big gap to the rubber seal, it's going to leak! It fitted flush on the old one.
didn't leak at all, but I did push it on tighter later on
I didn't save by calling Geico but I sure as hell have saved thousands listening to Scotty Kilmer.
Salute Sir!!
Nice! 1997/98 240sx! It's referred to as the "kouki s14" in the 240 scene
3:23 "It's over 9,000!!"
Great video Scotty! Removing older brake lines from a master cylinder or caliper can be a real pain in the @ss. If we don't see you in the future, we'll know you've been sacrificed by the Mayans.
actually, they almost got me. I acquired a weird bacteria infection there that almost killed me a couple weeks later.
Must have been a "Mayan" curse or Montezuma's revenge. Glad you beat it.
Funny this was posted on my list of videos.... Yesterday, my brakes went to the floor on my 1989 560SEL Mercedes. Luckily, I have a good mechanic, and I watched him check for leaks on all the wheels, then said it was probably the master cylinder !!
his neighbor's are like: Why does this guy slam on his brakes and do burnouts in front of his house?
Tyler Hanson he goes to a different neighborhood
and who otherwise is a fantastic neighbor.
Would you still need to bleed all 4 calipers/wheel cylinders since you cracked the lines at the master cylinder? Wouldn't that introduce air between those lines and the proportioning valve?
That’s what I’m thinking too I’m really not sure about this method. But then again I have no mechanic, but everywhere else they are saying to bleed the brakes from the calipers. This method seems blunt and brash. Not worth it in this method to me for life saving brakes.
Scotty, love your videos, a lot of help for a guy without much money to fix his car, keep them coming!!
Hey Scotty. I have a sinking brake pedal but it firms up after several pumps but eventually will go soft again. Is that the same symptoms of a faulty master cylinder? Thanks.
The cylinder canister was never put on correctly (3:00). I hope that got fixed.
That would be dangerous.
You remind me of my favorite uncle when i was young. Smart and fun to hang around with!
Scotty do you have to bleed the brakes at each caliper when you replace the master cylinder? Or is just the master cylinder good?
he says no
could you do a video on how to change the brake booster?
I love your channel. Presently pulled the master cylinder on a SS454 (1990 Chevy Silverado 1500). Pedal goes to the floor. I love the idea of opening the lines at the master. Saves a lot of time and I know the calipers and rear cylinders are NOT leaking. Ordered a Doorman Master Cylinder today for $30 bucks. I did see a lot of fluid corrosion on the botton outside of the booster and ran a borescope inside the booster but don't see any fluid inside of the booster. Of course the rubber diaphram could also need replacement but I don't like the idea of loosening the four fasteners under the dash. I'm your age. Hurts to get down....lol....we'll see how it works after I get the master cylinder back on tomorrow after Labor Day. Heck, it's Labor Day. I shouldn't be doing labor....heheheh
Ha ha, love this guy, shouts everything, gets a screwdriver to press a pedal when another person could do it, leaves the reservoir tank half off, burns up the road and screeches to a stop in his own neighbourhood, and get hundreds of thousands of views for doing it, crazy world we live in.
Thanks a ton! My brake pedal lost pressure while waiting on a slow poke to leave from the parking lot so I could park. It had never done that before. Now I will show this video to my hubster!
Got a video on diagnosing/replacing the ABS module? I suspect this is the issue with my 03' Ford F150. The brake pedal loses pressure and goes to the floor, then gets pressure between stop lights, rince repeat. thankfully the brakes do work....but not as they should.
Are you kidding me?? I'm just now learning of the brake bleed trick? You mean no more pulling tires off, laying in the dirt and chasing air bubbles?? I kinda feel dumb now lol. Saved me so much trouble. Thanks
So this bleed all the lines too?
Looks like the tachometer is pinned to max.
MichaelAChang scotty loves to "rev up your engine" haha even past red line
No wonder the brake pedal sank to the floor...! :-)
MichaelAChang
A redline a day, keeps the mechanic away!
As it should be.
You always solve my car problems. Thanks for your show.
+benjamin meza thanks👍
that screwdriver dude!!!
Scotty, U are genious!!!
this guy is amazing super fast and accurate got the job done in 15 mins all by himself good job SCOTTY
I have my neighbor working on my brakes because I didn't see this video beforehand. How much should he charge me to do this job and work on the brake drum?? in the rear tire? Thanks and keep up the good work.
I'm hoping the way of bleeding the master cylinder works for me tomorrow been having a nightmare with my Ford galaxy brakes after replacing the master cylinder and clutch master cylinder got the clutch pedal easy by reverse bleeding using a easy bleed kit but not a good break pedal will try this before anything else tomorrow also thanks for the help with the no read from my scanner I unplugged the egr valve on my volvo and hay presto was able to scan and clear codes your a star keep up the good work
Just to update my comment it worked nice stiff pedal now thanks again
I had this happen to a call about four years ago. When I took at the Firestone they looked at me like I was stupid. I kept telling them the brake pedal sinks when I'm stopped at lights and they thought it was the dumbest thing ever. I took it to a different mechanic and he knew exactly what was wrong and fixed it immediately
This bloke knows wat it's all plain & simple Proper mechanic
Thanks scotty. Dealership wanted to charge me crazy amount. You just saved me money and time and possibly a rental
Great tip on bleeding the MC! I was going to have to do this on my old Mercedes, but that car ended up on its side in a field before I had a chance!! The accident was not due to the brakes I hasten to add...
Can master cylinder be at fault when handbrake isn’t strong enough?? The car is civic 05’ with discs on the rear. Brake pedal is slightly sinking. New handbrake cables, new discs, new brake pads.. adjustment Done by the book with adjusting procedure start when self adjusters are backed up, adjusting nut lossened and handbrake on 1 click... both rear calipers are also new..
Scotty Kilimer is my new AUTO MECHANIC Teacher! Thank you for your wonderful channel!!
Did you have to bench bleed the cylinder before putting it on?
What he is showing is the same equivalence to bench bleeding....not many people can afford or own a bench vice so this is another way to do it.
Scotty. I have a '17 Hyundai sonata with 100k miles. Every now and then the brakes won't respond. I can press the pedal and it will stop halfway without much braking. This happens mostly in wet conditions and when I'm traveling over 70 mph
Do i need to suck out the old brake fluid if im changing the entire master cylinder?
I had never thought of using a screwdriver like that.
I had always bled brakes with somebody else to press the pedal.
Great show, Scotty! Thanks for the tip! :-)
I use an old adjustable length pole from window cleaner/painting ;)
Scotty
74 corvette brakes. Changed calipers, multifunction module and master cylinder. Just cannot seem get brakes to not go to floor.
Old 2 calipers bleed screws in back.
Tks Keith
Oh yeah. Replaced booster too
When tightening the lines with the wrench between each repeat, do you tighten them as absolutely tight as possible? Having this issue now and we did the process and have no brake power. We must’ve done something wrong
So what's wrong with priming it on the bench? Mine come with a little kit to do that, and even after that some air is bound to get into the open lines, so probably a good idea to bleed the whole system.
I have this problem with a 2000 Audi A6. I believe there is a flooded rock quarry nearby where i can submerge the vehicle... you know, test for leaks and stuff you said, and forget the car ever existed in the first place. If I could ever meet the designer in private in an undisclosed location that would be just fantastic. I would be interested in going over some of his ideas with an aluminum bat or an old chainsaw.
how would you know if the abs regulator was bad compared to the master cylinder? My brake pedal goes to the floor. I have a 2013 Hyundai elantra gt. Thanks, i love the channel, great work!!!
Hey Scotty I just replaced my two front brake calipers, rotors, and brake pads. I bleed them until there was no more air coming out. My brake is still squishy though. I even bled the back brakes also and still squishy.
I have a old 77 Ford truck that does this. When I'm at a stop the break pedal slowly goes down causing you to quickly pump it to keep the beast still, so I don't drive it anymore :-) I guess now I have something to investigate. Thanks for the tip Scotty.
@ 0:42 ~ "There's nothin' leakin' on *this* side"
Correct me if I'm wrong, but I believe there's nothing on the outboard side of a caliper assembly *to* leak. (at least not on the one shown)
And.....since not all wheels are spoked/slotted, can you cite a scenario where there would be evidence of a leak on the outside *only*.... and therefore be missed by a "wheel on" visual inspection?
Up at 2am because my wife almost got in a wreck and its more likely the brake master cylnder thing im not sure but u have me some hope scott thank u 😊
Hello, i have a Honda Civic 2007 Sports 2.0 F D
Last 3 weeks ago I checked the brakes by pushing the brakes with full force to see if they will work in an emergency. After 1 weeks of that passing, my brake paddle started to sink. When in slow speed, the brake paddle sinks And when on a highway on 100km/h speed, then at that time it feels like hardness in the brake paddle - then the brakes feel 60%% effective. And i have checked Master- cylinder, brake line, brake calliper, and there is no leakage signs anywhere. When i turn the car ignition off, pressed the brake paddle 3 times- the brake paddle when the full hard and I couldn’t press down any more. When i put my feet on break paddle, turned the car ignition on the break paddle sinked full. And my break pads have approximately 70% life. And the break rotors are perfect I even checked by break bleeding- no air came out of the system. I also refilled break fluid. When i start my cat in the morning and the weather is a bit cold, the car breaks become 60% effective. And when i drive 10km then the car brakes become 30% effective. And then i need to press the paddle hardly then the brakes work. There is also no check light coming in the dashboard. Please advise me what is the fault in the car and what i can do. Thanks
Hello Scotty your videos are fenomenal and very educative.
I need some help, I have a Honda Accord 2008 V6 and i’m having the same issue.
I have had changed the brake pads and the car worked perfect for months since i got it and before everything happened. Few months later i experienced the spongy pedals and a mechanic bleed the calipers and being honest it didn’t work for long time.
Then the spongy pedal got worse and i saw the ABS signal on the dashboard when i used to brake hard and suddenly, it wasn’t working as it’s supposed to do it, I checked the car as explained in the video and i have no leaks, nothing like that. I proceeded to replace the Master Cylinder for a new original one and bleed it, after that everything was alright, and the pedal was hard and perfect and the ABS disappeared.
Around 5 days later I experienced the same sinking pedal for a moment but 5 min later it worked again and so far nothing has happened again but I don’t know if there’s something wrong, I’m not sure if the problem it’s the ABS or Brake booster 🤷🏻♂️… it’s a headache
So you don't have to check the brake fluid level in the reservoir to make sure it is actually leaking?
After I replace the resvol, it's very firm when the engine off. But once the engine is on, the panel feel the same, have to press it half way then start to brake. But panel is 2" away from the floor still, if something relate to between the brake booster and the engine?
How to bleed at the master cylinder...great! Thanks.
OK so I have no leaks, all new calipers, new rotors, new pads, and I just replaced the master cylinder as well. We bleed the system with a power bleeder 3 times. No air is coming out at this point. And we have put 3 quarts of brake fluid threw this thing.
I STILL have a spongy brake pedal. No change at all. And all 4 brakes are dragging enough to hold the vehicle in place in gear.
All calipers move free. All fluid is clear and air free. No ABS light. And no Brake warning light.
So now what do I do?
BadmunkyWRX take it to a mechanic
Almost definitely a brake booster
I had a friend accidentally put the front calipers on the wrong sides (older Nissan pickup) so the bleeders were on the bottom so of course he couldn't bleed them. Only vehicle ive personally seen where that could happen. He got quite frustrated for a while lol.
better angles would help too.. but appreciate all you show
Yup exact problem with my car my break peddle sinks every time I drive my car and my abs light came on. Even though its not on currently which is odd because you would think it would stay on. But anyway i have a 1992 Mercedes benz so how much would a ABS replacement cost?
I ride around in my little festiva with the brake light on and the brake peddle sinks to the floor on occasion, I just pump it once and its fine. Keeps me awake when I drive .... thinking I have ne brakes at a split moment. I guess that would be the master cylinder. I will probably get around to fixing it when I get time.
this man is a legend, why havnt I watched this sooner. somuch easier way to bleed brakes
that's why the Mayans died out, bad brakes!
They died because all of them stared at a bullshit calendar.
Good video but some advice. That reservoir didnt seem seated properly on the Master cylinder. Avoid buying rebuilt master cylinders because they fail more often. When prying on the seat, use a block of wood or something to disperse the force. I know from experience I have had a seat rip because of it.
Nothing personal I'd go to a shop and be done
Hey scotty, I loosened my brakes because I thought they needed bled even though all that came out was fluid and now it sinks, what should I do?
Q-Pid Avenger what did you do
Donald Elam sane here. New caliper, bled brakes, MC went dry then I refilled and now spongy brakes. Do I just need to bleed MC? The way he does in the video?
nice this channel is fixing all my car problem other then knowing jack about car at least I found out what was wrong with my weak breaks and how to fix it thanks
Scotty, when are you going to have a "Meet-Up". We would definitely go and love to hang with you for a bit!
the needle on the tach is a common problem on Nissan's and can be fixed by using a magnet take a magnet and put the needle to zero and it should work
If you have drum brakes in the back you may just need to adjust or replace the shoes to tighten the pedal up.
Hey Scotty Kilmer, I have a sinking brake pedal, also if the master cylinder is bad can you get a hissing sound coming from around the brake pedal when applying brakes?
one of my best car channels on youtube!! ☆☆☆☆☆
The mechanic i go to couldn't figure why my break pedal goes down so he disconnected the sensor. Thank you Scotty and yes i'm going to somebody else.
Glad you're enjoying your travels scotty!
When replacing Master should you always replace booster??
Scotty, I was doing brake job on my 2007 Denali and discovered a bad caliper. I removed it and clamped the hose. Foolishly I ordered new caliper and the lines dripped out slowly while I waited for delivery. I am having trouble getting back proper pedal pressure. Do I need to do a ABS brake bleed or something? Thanks for you videos. Use them a lot.
2004 Nissan Altima 2.5 SL, the transmission shifts hard from 1-2 regardless of temperature, what might be causing this? It doesn't appear to slip at all and it has always been taken care of. The trans fluid is a nice pink so all good there.
If it has a lot of miles, it may simply need a rebuild, but most trans pro shops do free evaluations, see what they say is going on....
I live in New England and my car is under a carport. What can to extended the life of a car that isn't "driven" enough - undercarriage, exhaust and engine block rusts? Is there such a thing as a crankcase desiccant? Do I really have to put a lot of millage on it going nowhere?
scotty kilmer just keep up helping people like me 👍😇
Just changed mine today on Saab 9-5 worked a treat, thanks👍👍
That was a pretty cool trick with the screwdriver and seat. Another reason I like Scotty's channel!!
Great tip on bleeding the MC..but why not rule out a pinhole leak in the brake line under the chassis? 8th gen Corollas are notorious for developing pinhole rear line leaks at the support brackets, due to their design ( catching salt during the winter, and dead leaves in the fall, thus causing corrosion over time ).
you would see fluid leaking on the ground then. And this is Texas, they don't rust much here
yea but if the master cyl is leakin inside the booster it can and probably has mad the booster go bad, which is ussualy indiacotve of a whoosh spund when stepping on the brake
Replaced my master cylinder and brake booster cause the bellow was leaking, bread the lines and I have no pressure at the peddle only when the car is on. Once its off I have pressure again on the peddle.
I changed my driver side caliper and now my brakes sink to the floor. Obviously all the brake fluid from that caliper was bled out. Surely my master cylinder doesn’t need replaced?
does that trick really work for bleeding the master?
i always bench bleed it with return hoses.....
This man just saved me some money
My brake have to be press half way down before I can feel it react. I replaced master cylinder and use the original resvol , after all this done, I find out brake light stay on. When I unplug it from the resvol, it goes away. Did I do something wrong when I transfer the resvol over?
Scotty is over 9000!!!!!!!!!!!!!!
Was is not supposed to be bled before changing the master brake cylinder?
spot on scotty i love the brake test just skid to a stop in the street lol
I have a 2016 GMC Yukon XL replaced caliper Twice times do you think it’s manufacturing problem or something else I have a new pads and rotors all around once passenger side rear And driver rear too
Lol, the slamming of the brakes was funny