What would cause this?
05-04-2014, 10:54 AM
#1
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What would cause this?
Basically its a bit of an odd braking problem, if im driving around a low speed my brake pedal feels normal, if I speed up, somtimes it feels normal and some times i can push the pedal down about half way before I even get some decent stopping power! It doesnt seem to be random it seems to do it more when im going quicker?
Its a Focus Diesel so it has a Vacuum pump which was leaking/split so thats been changed and the problem is still there!
It just happend on the way home from work one night, nothing had been done to the car, its not using any brake fluid, all the pads are still there and the handbrake is fine. What would be causing this loss in feel of the pedal?
Its a Focus Diesel so it has a Vacuum pump which was leaking/split so thats been changed and the problem is still there!
It just happend on the way home from work one night, nothing had been done to the car, its not using any brake fluid, all the pads are still there and the handbrake is fine. What would be causing this loss in feel of the pedal?
05-04-2014, 06:22 PM
#3
PassionFord Post Whore!!
Yeh, if wheel bearing has play in it, it can push the pads back..was a bugger on rear discs on Golf GTIs!
Have you had the pads out to make sure they're not,seized in the carrier or parting from the backplate?
Check calipers/sliders are free too.
Have you had the pads out to make sure they're not,seized in the carrier or parting from the backplate?
Check calipers/sliders are free too.
05-04-2014, 06:44 PM
#4
big floppy donkey dick
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if a brake is sticking on it will boil the fluid on that corner go for a gentle 20 min drive and feel the wheel with your hand (careful incase its fuckin roasting!)
this will indicate any/if it has sticky caliper/pad etc
or i have seen ABS units do this too
this will indicate any/if it has sticky caliper/pad etc
or i have seen ABS units do this too
06-04-2014, 04:46 PM
#5
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The brakes arent sticking on, in a nutshell its like I have a normal brake pedal one minute then I have to push it down about 50% before I get any real braking.
Its had 2 new front wheel bearings about 500 miles ago and rears about 2000 miles ago, no noises or play in any of them. (Around the same time ive had new shoes and pads). Its not like it just sinks to the ground theres a tiny bit of resistance then it goes hard (giggedy)
I want to take the rear drums off but the 4 bolts on the back of the hubs are all rounded and I dont fancy taking the rear drums off via the hub nut as it will ruin the bearings!
The handbrake still works spot on.
Ive asked a few mechanics and looked on forums describing my symptoms and im getting pretty much the same answer an 'Internal leak in the master cylinder'
I know the vacuum pump wouldnt cause this but it needed replacing anyway as it was leaking oil out of it.
Its had 2 new front wheel bearings about 500 miles ago and rears about 2000 miles ago, no noises or play in any of them. (Around the same time ive had new shoes and pads). Its not like it just sinks to the ground theres a tiny bit of resistance then it goes hard (giggedy)
I want to take the rear drums off but the 4 bolts on the back of the hubs are all rounded and I dont fancy taking the rear drums off via the hub nut as it will ruin the bearings!
The handbrake still works spot on.
Ive asked a few mechanics and looked on forums describing my symptoms and im getting pretty much the same answer an 'Internal leak in the master cylinder'
I know the vacuum pump wouldnt cause this but it needed replacing anyway as it was leaking oil out of it.
Last edited by Cardie; 06-04-2014 at 04:47 PM.
06-04-2014, 04:57 PM
#7
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06-04-2014, 10:37 PM
#11
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The car doesnt have ABS it just has the 4 channel master cylinder.
I took the rear drums off before to have a look, nothing obvious was staring me in the face but there is a lot of brake dust and I have a brake fitting kit lying around with new springs etc so its getting a full rebuild tomorrow.
In the process of removing the drums, looking and putting them back ive completley lost my handbrake and ive manged to get the brake pedal firm again!.... Nah im joking it was fine for about 2 minutes then went back to normal again but its still doing just not as much? There was no leaks, splits or anything obvious at the rear drums, ive also asked a Honda mechanic who said its most probably the master cylinder leaking inside itself.
Il update tomorrow when ive given the rears a proper rebuild, as ive ran out of brake cleaner at the moment.
I took the rear drums off before to have a look, nothing obvious was staring me in the face but there is a lot of brake dust and I have a brake fitting kit lying around with new springs etc so its getting a full rebuild tomorrow.
In the process of removing the drums, looking and putting them back ive completley lost my handbrake and ive manged to get the brake pedal firm again!.... Nah im joking it was fine for about 2 minutes then went back to normal again but its still doing just not as much? There was no leaks, splits or anything obvious at the rear drums, ive also asked a Honda mechanic who said its most probably the master cylinder leaking inside itself.
Il update tomorrow when ive given the rears a proper rebuild, as ive ran out of brake cleaner at the moment.
08-04-2014, 04:06 PM
#12
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Right stripped the rears completley, cleaned everything, sanded the pads,sanded the insde of the drums so they are all nice and rough (obviously smooth but rough).
After taking the drums off about 14 times each because the auto adjusters dont really work ive finally gotten somewhere!
The handbrake is brilliant! Never been so good in its life and its stopped bloody creaking!
After nearly melting a drum because the adjuster was too far out ive retracted it and now got 2 free spinning drums, though when the handbrake is applied then taken off one of them still drags a little bit until you tap the rear drum with a small hammer or go over a bump or whatever.
Anyway the pedal seems to be a lot lot better, very responsive braking no sinking when your driving around. However when your, say turning around in a car park it will drop probably 20% No where near as much as it used to but it definatly sinks!
After taking the drums off about 14 times each because the auto adjusters dont really work ive finally gotten somewhere!
The handbrake is brilliant! Never been so good in its life and its stopped bloody creaking!
After nearly melting a drum because the adjuster was too far out ive retracted it and now got 2 free spinning drums, though when the handbrake is applied then taken off one of them still drags a little bit until you tap the rear drum with a small hammer or go over a bump or whatever.
Anyway the pedal seems to be a lot lot better, very responsive braking no sinking when your driving around. However when your, say turning around in a car park it will drop probably 20% No where near as much as it used to but it definatly sinks!
08-04-2014, 04:42 PM
#14
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