Brake failure!!! sorta...

Soldato
Joined
18 Oct 2002
Posts
11,038
Location
Romford/Hornchurch, Essex
arrg i just (well sunday) had a 2 scary moments in my life of driving, and that's only 2 months worth...

I have a 03 Fiesta 1.25lx....

Here i was going down a dual carriageway at 70 and ahead of me, i see a people carrier coming slowly down of a slip road... However the person driving this must have been drunk or seriously stupid or both, but instead of pulling onto the road like normal, he pulled across ALL 3 LANES of traffic RIGHT INTO my path. I slammed brakes on, probably got her down to under 40 in a few seconds, as well as nearly hitting central barrier of the dual carriageway as i tried to avoid this idiot.

So anyway, that shook me up but i didn't know worst was to come. I finish my journey down the fast roads and turn into the country lanes (30s around here), and then enter Hornchurch town center. I had used the brakes a few times since this very hard braking incident however i hadn't had to stop.... So I'm going through the town, doing probably 20-25mph because most of the traffic lights are off and the police are getting ready to close the town roads (or something) because of the football, people are everywhere so i not going fast...

I'm following a Jag XJR (a really old one) and the lights go red. I start a "normal" brake usage to smoothly slow the car down, however nothing happened, so i pushed harder thinking omg!!! the pedal went about half way down before they started working at which point the car started braking and ABS kicked in (since the brake was on the floor now). it took about 100meters to shave off 20-25mph... i couldn't believe it. i either have 0% brakes, or 100%.

I continue the drive, keeping under 20-25mph (much to people behinds me disgust) and having rather poor brakes. and got home safely, but with some rather harsh braking.



After the car cooled down i checked the brake/clutch** fluid it seems OK, its at or just below the max mark, well above the min mark. I checked the front disks and they seem dirty, not shiny like my mates fiesta ST, but i haven't driven through any oil or anything so i don't understand that. Once the car had fully cooled down i drove to my local Tescos car park to test the brakes (roads was dead, footy was on) and the brakes seemed to have improved but the pedal is still very soft but i can at least do smooth braking now. My mate popped down and gave me some car audio parts then gingerly drove home.

So the pedal has around 1-2inch of travel before any braking action is applied....

So, as I've said I've checked:

1: the brake/clutch** fluid. it looked fine.
2: the disks look slightly dirty

I will check the pads soon and might decide to bleed/replace the brake/clutch fluid too.

Be at ease I'm not driving the car anymore.

What other faults could have caused this?



** brings me to another point, my clutch has been acting up lately, IE it doesn't release totally when cold so its hard to change into gear when first starting the car, and since they use the same fluid system i wonder if something is wrong with the fluid, even though it looks OK???
 
i would clean the brake disks with brake cleaner and also blead the system... and refill

see if that solves it
 
The brake disks should be shiny from the pads rubbing them.

You may have a stuck calliper so only one side of the disk is being pushed against and the outside is not hence the dirty look.

By dirty, is it kinda rusty?

And if you don't know the last time the fluid was changed, then get that done as well.
 
heavy braking will not cause your brakes to fail, something else must have happened to them either boefore or after the incident.

Get your front wheels off and check for oil or grease contamination. Check the calipers and lines for leaks. Bin the pads and get some new ones. If the discs are in good condition then thoroughly clean them all over with brake cleaner (easier to remove the discs from the car first) if you have any doubt then bin the discs too and replace with new (clean the grease off before you fit them ;) ).

See what the brakes are like now (remember you need to bed in new pads and discs).

Get yourself an eezibleed kit and bleed you brake/clutch system.

Fog
 
MuvverRussia said:
had the brake fluid changed in the amount of time you've had the car? Know ford recommend it to be changed every 2 years...

I've owned the car 2 months, but its 3 years old. I'm not sure if the fluid has been changed because the service history didn't mention, its just stamps of where it was done, not any changes.


Chocki said:
The brake disks should be shiny from the pads rubbing them.

You may have a stuck calliper so only one side of the disk is being pushed against and the outside is not hence the dirty look.

By dirty, is it kinda rusty?

And if you don't know the last time the fluid was changed, then get that done as well.

not rusty, more a few black areas on disk, but its more shiny than black... probably 20/80. Ive only checked one side of the car, so i not sure what the other side looks like yet. However the car doesn't pull when it brakes.

I just cant brake smooth anymore, push down and very little happens. push a bit more and its like an emergency stop.... :confused:
 
Sounds to me like your fluid is in need of changing. As you may (or may not) know brake fluid absorbs water over time and as the water content increases the boiling point of the fluid drops. I'd say that your big stop boiled the fluid rendering it useless until it had time to cool.
 
kaiowas said:
Sounds to me like your fluid is in need of changing. As you may (or may not) know brake fluid absorbs water over time and as the water content increases the boiling point of the fluid drops. I'd say that your big stop boiled the fluid rendering it useless until it had time to cool.

thats almost exactly what my dad said. :)
 
sounds like that one stopped faded them to buggery. get some new fluid. with decent brakes you ought to be able to do mile after mile of 70+ and 100+ stopping without fade
 
kaiowas said:
Sounds to me like your fluid is in need of changing. As you may (or may not) know brake fluid absorbs water over time and as the water content increases the boiling point of the fluid drops. I'd say that your big stop boiled the fluid rendering it useless until it had time to cool.

One big stop won't be enough to give massive brake fade surely? The brakes on my cavalier were bad for brake fade, but it took a good spank through milton keynes to get them to go spongy - 8 or 9 stops from "quite fast" down to 20 or 30mph for the roundabouts.
 
3 year old brake fluid shouldnt be that bad.

The fluid in my 406 is original (7 years old) and I did several 60-0 emergency stops in it the other day (good old G meter ;) ) and the brakes just got better and better each time. Although it did look like I had set fire to the underarches with the amount of smoke coming off the pads :eek:

Fog

PS I'm bleeding them in a couple of weeks before anyone says anything :p
 
could need bleeding too, but for the effort you may as well replace the fluid.

when i brought my car, the seller didnt even advertise the fact that it had x-drilled front and back as well as fancy pagids on there
 
sorry to hijack, but when i brake really heavily for a bit, my brake pedal siezes up and has almost not travel at all, making braking fun! :p

I have to wait a while for them to return to normal (cooling down?) this only really happens if im doing some back lane driving or stopping from a high speed quickly a lot
 
again, thats fade. usually the fluid boiling. if its more than 3-4 years old, replace it, unless you have no intention to drive quickly.
 
Matt82 said:
sounds like that one stopped faded them to buggery. get some new fluid. with decent brakes you ought to be able to do mile after mile of 70+ and 100+ stopping without fade

Surely not! After the last huge thread of brakes the concensus from many people here is that there can be no possible advantage in fitting bigger brakes... :D
 
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