I have a z600 coupe. The front brakes are hanging up when first
applied. After I drive it for a few feet they seem to release. I have
removed the master cylinder and cleaned the return ports. This did
not seem to help. The problem seems worse after the car has sat
overnight. It gradually gets better if I drive it for 10 miles or so.
Any thoughts on what might be happening?
Sticky Brakes
Re: Sticky Brakes
Could be bad front hoses, could be rusty or sticky calipers.
Kevin.
Kevin.
Re: Sticky Brakes
Put the car on stands all round so that you can find which of the
wheel(s) is binding. Probably a partly seized piston somewhere.
Greg
wheel(s) is binding. Probably a partly seized piston somewhere.
Greg
Re: Sticky Brakes
Greg,
I've had similar problems, do me a favor, remove the vacuum from the brake
booster, and plug the intake manifold vacuum so you don't have a big leak,
and then see if the binding is still there. I'll bet you its not. Let me
know.
Steven
I've had similar problems, do me a favor, remove the vacuum from the brake
booster, and plug the intake manifold vacuum so you don't have a big leak,
and then see if the binding is still there. I'll bet you its not. Let me
know.
Steven
Re: Sticky Brakes
I will give it a shot and let you know...
Thanks to all for the advice!
Thanks to all for the advice!
--- In
2cylinderhondas@yahoogroups.com
, "Steven" wrote:
> Greg,
> I've had similar problems, do me a favor, remove the vacuum from
the brake
> booster, and plug the intake manifold vacuum so you don't have a
big leak,
> and then see if the binding is still there. I'll bet you its not.
Let me
> know.
> Steven
> ----- Original Message -----
> From: "Greg"
> To: Sent: Wednesday, April 28, 2004 8:29 AM
> Subject: [2cylinderhondas] Re: Sticky Brakes
> Put the car on stands all round so that you can find which of the
> wheel(s) is binding. Probably a partly seized piston somewhere.
> Greg
> --- In
2cylinderhondas@yahoogroups.com
, "jm57572000"
> wrote:
> > I have a z600 coupe. The front brakes are hanging up when first
> > applied. After I drive it for a few feet they seem to release. I
> have
> > removed the master cylinder and cleaned the return ports. This did
> > not seem to help. The problem seems worse after the car has sat
> > overnight. It gradually gets better if I drive it for 10 miles or
> so.
> > Any thoughts on what might be happening?
Re: Sticky Brakes
Hey while I'm thinking about this.....
Brake fluid that has any moisture in it will cause this as well, what
happens is good brake fluid does not boil until it gets very hot, but brake
fluid with any amount of water in it expands and boils and that will cause
the brakes to feel as if they are being applied without putting any pressure
on the pedal. The first thing I'd do is bleed the system with fresh fluid,
you can do this with a helper or by yourself, if your alone let gravity do
its thing for you, open the furthest bleeder and be sure to keep the
reservoir full, this will take some time by your self, but it does work, you
can also use vacuum on the bleeder if you have it available. Be sure to
make sure your getting fresh fluid out of the bleeder before you close it.
The preferable way would be to have someone help, and again be sure to use
the furthest bleeder first, the early cars had two bleeders I believe on the
rear, the newer design uses only one. In any event always and I mean always
do the furthest bleeder first then the next closest to the master cyl, and
then the closest one. After that you will be able to diagnose the problem.
Eliminating the obvious first is always the best course of action, and the
least expensive. If after you have verified clean fresh brake fluid, you
can then proceed to the vacuum issue. I spent a while on mine and it turned
out to be the valve inside the vacuum unit. By the way, the vacuum unit
only assists the front brakes so its pretty simple to tell. Just block off
the vacuum coming from the manifold and leave the hose disconnected, drive
the car, the brakes will be much harder to apply, but they will work, and
then you can eliminate this as a source of your issue. Let me know and I'll
e mail you the brake system layout if you need it.
Regards,
Steven
Brake fluid that has any moisture in it will cause this as well, what
happens is good brake fluid does not boil until it gets very hot, but brake
fluid with any amount of water in it expands and boils and that will cause
the brakes to feel as if they are being applied without putting any pressure
on the pedal. The first thing I'd do is bleed the system with fresh fluid,
you can do this with a helper or by yourself, if your alone let gravity do
its thing for you, open the furthest bleeder and be sure to keep the
reservoir full, this will take some time by your self, but it does work, you
can also use vacuum on the bleeder if you have it available. Be sure to
make sure your getting fresh fluid out of the bleeder before you close it.
The preferable way would be to have someone help, and again be sure to use
the furthest bleeder first, the early cars had two bleeders I believe on the
rear, the newer design uses only one. In any event always and I mean always
do the furthest bleeder first then the next closest to the master cyl, and
then the closest one. After that you will be able to diagnose the problem.
Eliminating the obvious first is always the best course of action, and the
least expensive. If after you have verified clean fresh brake fluid, you
can then proceed to the vacuum issue. I spent a while on mine and it turned
out to be the valve inside the vacuum unit. By the way, the vacuum unit
only assists the front brakes so its pretty simple to tell. Just block off
the vacuum coming from the manifold and leave the hose disconnected, drive
the car, the brakes will be much harder to apply, but they will work, and
then you can eliminate this as a source of your issue. Let me know and I'll
e mail you the brake system layout if you need it.
Regards,
Steven
Re: Sticky Brakes
I received some advice from Miles on cleaning up the relay piston in
the brake booster. I tried it and it fixed the problem!
the brake booster. I tried it and it fixed the problem!
--- In
2cylinderhondas@yahoogroups.com
, "Steven" wrote:
> Greg,
> I've had similar problems, do me a favor, remove the vacuum from
the brake
> booster, and plug the intake manifold vacuum so you don't have a
big leak,
> and then see if the binding is still there. I'll bet you its not.
Let me
> know.
> Steven
> ----- Original Message -----
> From: "Greg"
> To: Sent: Wednesday, April 28, 2004 8:29 AM
> Subject: [2cylinderhondas] Re: Sticky Brakes
> Put the car on stands all round so that you can find which of the
> wheel(s) is binding. Probably a partly seized piston somewhere.
> Greg
> --- In
2cylinderhondas@yahoogroups.com
, "jm57572000"
> wrote:
> > I have a z600 coupe. The front brakes are hanging up when first
> > applied. After I drive it for a few feet they seem to release. I
> have
> > removed the master cylinder and cleaned the return ports. This did
> > not seem to help. The problem seems worse after the car has sat
> > overnight. It gradually gets better if I drive it for 10 miles or
> so.
> > Any thoughts on what might be happening?