Brake servo & master cylinder
16 posts • Page 1 of 1
Brake servo & master cylinder
Right well my car has been sat off the road for about 5 months and it's lost the brakes somehow I can't find a leak anywhere but my servo has a huge dent in it and corrosion where it meets the master cylinder and the fluid is below the min, I will top up the fluid and bleed the system again and see if it improves but I have a feeling that its the servo and MC as the reservoir tank doesn't sit in very securely, I will get pictures up of it ASAP I am wondering will a servo and mc fit off a mk4 as there are no mk3's in scrappies near me
I would go for the bigger servo etc off the Mondeo but not sure on what I need and I think you need something welding which isn't easiest for me as I can't weld or drive the car to somewhere to have it welded.... Any help guys????
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
You don't need to weld anything if you find the correct Mondeo Servo. Find an M-reg servo with no pipe running off for the clutch and this will fit. The rod length can be adjusted from the pedal by using washers on the pedal rod.
Your current servo and master cylinder is knackered, it won't hold the vacuum and it's got a leak into the servo unit itself.
Your current servo and master cylinder is knackered, it won't hold the vacuum and it's got a leak into the servo unit itself.
- DanFraser
- Post Master

- Posts: 791
- Joined: Sat Feb 21, 2009 3:17 pm
- Location: Derby
- Your car: Ford Fiesta SI 1.6
Re: Brake servo & master cylinder
That's what i thought was wrong with it nice one mate and right so any mondie with a dry clutch and no abs ?
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
Yup. I found mine in a scrappy on an M reg mondeo, the older ones seem to have more chance of what we need.
- DanFraser
- Post Master

- Posts: 791
- Joined: Sat Feb 21, 2009 3:17 pm
- Location: Derby
- Your car: Ford Fiesta SI 1.6
Re: Brake servo & master cylinder
Sweet cheers mate looks like a trip to the scrappy for me lol are escorts and focus' of the same age the same?
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
No idea about that. Best route is the mondeo because of the amount of people that have done it. When you remove one, don't forget the unions into the master cylinder as the sizes of these are different to the ones in a fiesta. A brake pape flaring tool would be needed for this.
- DanFraser
- Post Master

- Posts: 791
- Joined: Sat Feb 21, 2009 3:17 pm
- Location: Derby
- Your car: Ford Fiesta SI 1.6
Re: Brake servo & master cylinder
ok mate nice one
yeah il get new brake pipes made more than likely with the ends on as i dont have a pipe flaring tool or the ability to bend the pipes properly if need be
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
- AW3K
- Elite Post Master

- Posts: 2923
- Joined: Sun Apr 29, 2001 1:00 am
- Location: Wakefield, West Yorkshire Guide Master
Re: Brake servo & master cylinder
Thanks mate that will come handy !
I took a quick video of how wobbly the reservoir bottle today but looking at your guide I can't work out Wich mc I have???? Anyone know??
http://i606.photobucket.com/albums/tt14 ... a9cd68.mp4
Also here you can see the state of my servo and just about make put the huge dent

Apologies for quality taken on my iphone
I took a quick video of how wobbly the reservoir bottle today but looking at your guide I can't work out Wich mc I have???? Anyone know??
http://i606.photobucket.com/albums/tt14 ... a9cd68.mp4
Also here you can see the state of my servo and just about make put the huge dent

Apologies for quality taken on my iphone
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
looks like a mk4 or 5 fiesta one
deffo not mk3 , the bar inside is prob wrong size, causung problems
shouldnt wobble like that
whats the pedal like?
Andy
deffo not mk3 , the bar inside is prob wrong size, causung problems
shouldnt wobble like that
whats the pedal like?
Andy
- AW3K
- Elite Post Master

- Posts: 2923
- Joined: Sun Apr 29, 2001 1:00 am
- Location: Wakefield, West Yorkshire Guide Master
Re: Brake servo & master cylinder
That's just the reservoir bottle itself, I've been able to do that with every car I've opened the bonnet on, french, german, everything.
Bin the MC too, take EVERYTHING off the mondeo!
Bin the MC too, take EVERYTHING off the mondeo!
- DanFraser
- Post Master

- Posts: 791
- Joined: Sat Feb 21, 2009 3:17 pm
- Location: Derby
- Your car: Ford Fiesta SI 1.6
Re: Brake servo & master cylinder
There is a tiny bit of resistance in the pedal but feels more like air and it goes down to the floor it does stop the car (although iv only tried this rolling it across the driveway) and it's not great at that neither
right ok it does sort of make sense as it's a m reg 3.5 so is likely to have a few boys swapped over iirc so will the Mondeo servo still be ok? And will the pipes need changing? Also I have a tap and die set can I not re tap the tread on the end of the pipe to fit the servo??
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
DanFraser :That's just the reservoir bottle itself, I've been able to do that with every car I've opened the bonnet on, french, german, everything.
Bin the MC too, take EVERYTHING off the mondeo!
That was minimal effort if I push it with a little force the bottle almost lifts out of the m/c andyou see small bubbles come thru the fluid, it's defo had it lol
Ok so I want the servo mc and bottle and a bit of pipe with the connections on, and the cap if possible but I think my 1 fits
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
Re: Brake servo & master cylinder
You'll want to get the pin out of the rod arm behind the servo, this can crack and become useless so having one spare just in case is a good idea. Get the four bolts that hold the servo to the bracket. I think I used an 8mm drill bit to create a new hole (needs to be done because the bolts on the Mondeo servo have a slightly different pattern).
- DanFraser
- Post Master

- Posts: 791
- Joined: Sat Feb 21, 2009 3:17 pm
- Location: Derby
- Your car: Ford Fiesta SI 1.6
- AW3K
- Elite Post Master

- Posts: 2923
- Joined: Sun Apr 29, 2001 1:00 am
- Location: Wakefield, West Yorkshire Guide Master
Re: Brake servo & master cylinder
Ok nice one lads
what do you think the threads will be? And il put it on here aswell as my project thread when I get the servo and mc
- russ-RST
- Elite Post Master

- Posts: 1438
- Joined: Thu Apr 01, 2010 11:05 am
- Location: margate kent
- Your car: fiesta rs turbo
16 posts • Page 1 of 1



