How to bleed Master Cylinder Without Kit
Bleed Brake Master Cylinder While On Car WITHOUT Bench Bleeding Done Alone-No Partner!
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all right so as I was bleeding my brakes
I wasn't paying attention to the level
in the reservoir of the brake master
cylinder and the level dropped so low
that air was introduced into the master
cylinder now the brake pedal goes all
the way to the floor when I try to
depress it so that means I have to flush
the error out of the brake master
cylinder now the traditional way to do
that is to remove the brake master
cylinder put it in a vise and buy a
brake master cylinder bleeder kit you
run tubes from each of the exit points
back into the top reservoir and then you
pump it using like a screwdriver or
something to pours the compression of
what the brake pedal would normally be
doing that enters the piston into the
brake master cylinder forces the brake
fluid out through the tubes and into the
top cylinder when you can see the
bubbles becoming less and less frequent
when you do it well I found online a
great technique where you don't have to
pull the brake master cylinder from the
cart which is something I want to avoid
at all costs because my brake master
cylinder is very difficult to access I'd
have to remove all kinds of stuff to
require special tools very tight
clearances it's not an easy thing to get
it and basically the method I'll be
using is I'll be running a vinyl tube
5/16 OD 3/16 ID it's a 10 foot tube
I'll be running it from the bleeder
nipple on the brake caliper on my left
front wheel to the reservoir of my brake
master cylinder
now as I pump my brakes with that closed
system or it's actually a loop the fluid
will get pressed into the brakes it's
going to go down and it's going to go
into this caliper and it's been a start
working its way through the tube with
each
consecutive pump or more brake fluid is
going to be leaving the caliper entering
the tube and working its way down the
tube and eventually working its way up
and back into the brake master cylinder
reservoir and if we do it enough times
eventually all the air in the master
cylinder reservoir will work its way
down and out of that reservoir what's
great about this method is you don't
have to pull it you don't have to pull
the brake master cylinder from the car
and a vacuum is created because this
line goes from a plugged bleeder valve
all the way into the brake reservoir and
air can't be reintroduced back into the
line because it's a closed system
because the other end of the tube is
inserted inside the liquid all the way
in the brake fluid reservoir so air when
you release the brake pedal won't be
able to come back through the tube back
into the caliper and back into the car
reintroducing new air instead it's gonna
pull air from the reservoir or it's
gonna pull new fluid from the reservoir
when you release the brake pedal now if
some brake fluid will probably still
come up from the brake lines but the
small percentage that does come down
through the reservoir over time will
start to make its way out through this
loop and over time the reservoir will
get brake that did come down through the
reservoir feeding back into it and so
eventually all the air that's in the
brake master cylinder should be flushed
out fully and this is something that I
found two different sources that said
that it worked actually three different
people said it worked so anytime I I
researched things online I don't go
based on something one person said I try
to find multiple people who have
confirmed it so I think that running the
the tube all the way from the caliper
all the way back to the master
is the best way to do it not only that
but you don't have to buy like two or
three liters of brake fluid that way and
I've already flushed my brake lines this
is a post brake line flush job so this
is all going to be new fluid that I'd
rather reuse plus you're getting the
fluid making its way all the way back
around and back into the cylinder so you
don't have to keep pouring leader after
leader of new fluid constantly back into
your brake reservoir as you're pumping
the brakes and that's also beneficial
because when you're pumping the brakes
you might not realize when you pump too
much and now you just reintroduce air
back into the reservoir again because it
got too low so you don't have to refill
it all the time using this method so I
think this is actually faster because
you're refilling it as you pump this
fluid will be refilling the reservoir
automatically as I pump I think that's
even better for me you start out by
removing the and since I've already
cracked these bleeders once they won't
be see is down here or anything so all
right just so that I don't introduce any
debris to the brake master cylinder
reservoir in this process I'm gonna put
a coffee filter over the hand that's
going into the cylinder and that will
catch you need to breathe even though
this is new fluid there could still be
debris in the brake lines and little
particles I don't want entering the
brake master cylinder and messing with
the seal or ruining any part of the
master cylinder or the ABS system so
that's just going to be a safety
precaution I'm going to get a coffee
filter here effect
use a twist tie to secure this filter
and to my tube
[Music]
okay don't it ties it the past we go
I filled it right to here okay not a
single bubble so that just proves I did
a good job on my brake bleed
the only issue then is uh at the very
end on the last wheel I bled too much
didn't top off the reservoir introduced
fluid from the top down
or air from the top down so you won't
see that right away because the air is
only in the brake fluid master toner
that's the only place because I'm
totally paranoid right now
wow it's really making its way up that
hose I'm not playing around now keeping
this thing top ah yeah the air that was
in this line is entering the Florida
reservoir and bubbling out but
eventually the oil that's in this line
now is going to be working its way up
the line and back into the reservoir and
eventually its oils leaving the car it
needs to come from somewhere it's
dropping down the reservoir and into the
car or into the master cylinder
I won't have to fill it as frequently
once the freight Floyd reaches the
slender from the bottom up and it's
halfway there now this works it's going
to put the myth of Finch next bleeding
to rest now feat never again go out of
business
everyone's gonna bleed their masters
owner this way putting on a new install
top cording this video is going to
change forever forever change all right
just stop doing it you know what I kind
of like the idea showing you guys how
this is proceeding so here it is you can
see there's little gaps it's all the way
up to here now you can see it so it's
about to make the turn and enter the car
soon
a
[Music]
it's gonna be cycling itself
and there's leave in the system
potential it'll become solid gluten
- paranoid not to keep an eye on that's
kind of chill right here in the doorway
I didn't see any debris so my brake line
was really clean I feel like
theoretically this should eventually
have zero bubbles
once all the vowels have worked its way
through this will become a completely
closed system as far as bubbles go there
won't be any air left because no air can
be introduced that wasn't already in the
hose when I first began there's no place
for air to get in it's just not possible
oh I do see a tiny particle inside the
hose working its way through so it's
good thing I put the filter on in fact
I'll show you guys the particle you can
see how big there
you can see it right below the turn
right there and you can see one right
there I don't know if you can actually
see it maybe if I pump the brakes you'll
see it you'll see a move you see it
maybe I'll catch it when it crosses here
yeah you can see some little little
debris right there wow we're really
running out of bolts here guys all the
bubbles are almost completely gone now
so I think this is where really great
let's all that debris come out here I
feel really good about that I don't know
how long you have to keep going after
you don't see any error
you read what they're saying as I can't
really
it'll still be soft because the bleeder
is open once you close the clear they
should be normal really because every
time I compress the brake pedal
I'm moving fluid all the way through
this circuit so they're not going to be
hard the only B is hard to price is the
brakes that I'm moving through that
makes complete sense
great point take C good eye good eye for
detail there I completely agree that
sounds absolutely logical I'm still
gonna bleed all my brakes with my vacuum
bleeder after this is done just because
we don't know the extent of air that got
in to the to the system earlier maybe
that's overkill though
by the way I'm only pressing about 2/3
I'm not flooring the pedal because I
heard that's bad for the master sander
you shouldn't do that very often and it
doesn't go to the floor very easily at
all it did before but I mean it's it's
getting quite stiff
I imagine I'll get less and less debris
coming through which is why it's good to
keep to keep cycling it so we can filter
out all little ruts particles that you
weren't able I guess the camera wasn't
good enough soon I'm not seeing any
morning I'm not seeing anymore us
particles at the moment I see some fluid
moving in this back corner so it is
topped off yeah it's wet that's well
above Matt I want to extract this
without making a mess on either side so
I'm have to think about that yeah I can
take this off so I'm gonna put plastic
bag all around
some fluid from here I'm going to put
the filter in here and I'm gonna lift
this out and then put it right into here
my nice little drop and this is supposed
to not be on here this close the bleeder
before he disconnected okay that's a
great idea I think now would be the
perfect time to close the bleeder so I'm
gonna go ahead and do that right now
well everything's full ok righty tighty
so I'm gonna drain it as much as I can
to give a little gap of air here and
then I can suck it out or do whatever
okay so I'm undoing the little twist hi
I put on here twist tie removed alright
so not a drop dropped out of here and
that's because there's still a vacuum
with the bleeder as soon as I pull that
this is going to come flying out so you
know just be safe on their hips and
paper towel around it
not one drop all right now we're just
going to let it drain out and we're
draining it back into the brake fluid
container just lift this side
all right I'm willing to try it I'll see
you I'll see how the breakout feels it
feels spongy I know I need a Fletcher
The Kills very firm I'm gonna try
test-drive you
all right so it's still very very spongy
it doesn't go all the way to the floor
anymore but it goes down quite a bit
yeah I removed the burden s class from
paper and I did cap the master cylinder
that's correct so since I now have to
flush all the breaks
I still feel better that the brakes at
least didn't go pedal all the way to the
floor it tells me I got a lot of air out
one way or another so let's begin
what I do know is I'm thoroughly
bleeding every single one of these so
I'm leaving no doubt if this does not
work then we know there's either air in
the master cylinder despite my attempts
or there's air in an ABS system if that
happens oh I'll have to pull the master
cylinder and bench bleed it you know
what I should just have that attune
right now I really hope this work didn't
succeed so that I can enjoy the
wonderful privilege of having to pull
the master cylinder and bench believe it
that's the attitude I wouldn't want to
rob myself of the opportunity to do my
first bench bleed ever Wow so I sure
hope this doesn't work does across my
hair isn't just hoping my brake pedal
just sponges right to the floor are we
any braking whatsoever that's my goal
all right guys the brake pedal has about
two inches of give it's not stiff it
does seem worse than when I first
started this whole project but it's
nowhere near going to the floor like it
was before I bled these last three
brakes it now it's I don't I don't like
I can drive it like this in other words
um in fact it could be how it was to
begin with but it it does give a little
bit it's just it's nowhere near going
like halfway into two thirds down it's
there's a little bit of give and then it
starts so I'm gonna test drive it now I
feel safe enough with it to test drive
it I'll be back
we did it guys perfect I can tell it's
perfect he took me a while to get the
feel for I had to drive around for a bit
just to take his use like when you
forget how the brakes are supposed to
feel it takes some time to remember like
yeah this is how they used to feel so
they will never really stiff brakes you
always have to press down a little bit
they eased on there really smooth
it's not like a hard pedal where you
just immediately stop as soon as you
touch the pedal so bottom line is
mission success huge huge win and we
don't have to bench pleat it and we
proved that that system where you
connect the hose to your reservoir from
your front left wheel caliper bleeder
running a direct line and pumping the
brakes that that did in fact flush the
master cylinder and my brake pedal is
back to normal everything's perfect we
flushed all the brakes after that and
it's perfect so wow I'm I'm really
really pleased with this really really
happy
