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Guest Patt

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Hi - as indicated on another post I have recently had my 2B through the IVA and it failed on a number of very minor stuff eg needed more brake pipe clips, covers for electrical terminals, coil needed a weather proof cover etc

However on the way to the test station the brake pedal went virtually to the floor, it could be pumped and slightly got better but would go to floor again. Obviously this was one of the fail items, I was very surprised the tester let me drive it back home!

As there was no sign of a leak and the level of brake fluid in the reservoir had not dropped at all I suspect the problem lay in the master cylinder.

The master cylinder fitted is ford one part number K0236 311809. Here lies my problem as these appear to be unobtainable- I have searched the internet without success, I would rather fit a new item, however, would consider a overhaul kit to get though the IVA but these seem unobtainable also.

Can anyone advise of another M/cylinder that will fit without a major rebuild, I seen the posts about fitting KA M/Cs but it looks like a fair amount of work to convert.

Any help would be appreciated

Stuart

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Thats a Mk.7 escort m/c according to a brief internet search, right? Can't be that hard to get hold of, surely?

 

https://www.ebay.co.uk/p/Ford-ESCORT-Mk7-VII-Brake-Master-Cylinder-Tank-Fluid-K0236/1330476603

 

is it that?

 

How confident are you that you bled it correctly? Are you sure it's the m/c (could be the seals, I agree)?

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Hi dan - thanks for the reply. Bled and better bled the system. It took quite some work to get a pedal, which may also be a sign of a failing m/c

The kit was bought in 2003 and was put together by 2005 and then left untouched untilI I retired some months ago. All the brake slave cylinders were renewed but the m/cylinder was never touched- the car has stood for 13yrs!

Yes I looked at the escort one but it looks totally different to mine which is much longer. However, if it fits the servo etc Im ok to adapt the brake pipes to fit. Im tempted to go for this as I am pretty stuck at the moment

Stuart

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Yes I’ve heard the KA one is an option but it seems it’s not a straight swap - I was hoping to get a retest asap. In my many conversations with numerous motor factors and ford specialists, one guy told me that there had been 17 different m/c’s fitted to sierras over the years. I’m sure that amongst all of them there will be one which will do the job, it’s knowing which one to go for.

The m/c ‘ that kit spares is different from mine.

Stuart

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If you can't narrow down the one you have, all I can suggest is you measure the important bits with regards to how it fits to your car (bolt spacing/pattern, number of outlets you need) and find a friendly motor factor who can browse through his parts catalogue for you :)

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A picture paints a thousand words, post up a photo of what your current set up is.

 

What pedal box and servo are you using, what size front discs, drums or discs on the back. Given this information and a picture should narrow down the possibilities.

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The braking system is totally stock 1989 Sierra 2ltr, discs front, drums to rear and stock servo, all taken from the same donor car. Have tried to attach images but they are being rejected because of size.

 

Stuart

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1989 2.0 Sierra has a limited choice of master cylinders. Ideally you don't want to have the TRW version which has a black painted steel tube body. They're difficult to get hold of and expensive. The other options are generally around £40 and whilst seal kits are probably available, they're probably not worth fitting in a cylinder of unknown quality.

 

Note that when you replace the master cylinder, it doesn't come with the reservoir so you'll need to reuse the old one(*after giving it a good clean).

 

https://brakeparts.co.uk/shop/Ford/Sierra/82-89/Sierra%202.0%20OHC%20Models/Hydraulic%20Actuation%20-%20Master%20Cylinders%20and%20Reg%20Valves

 

You need to either use an image resizer program or set up an account in postimage.org and post them from there.

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Brake Parts is one of the companies I have spoken to and the only company I have found which lists the correct M/C which is the BMC4729 and as the web page indicates - is out of stock. I contacted them and they couldn’t say when they would get more, if ever!

However, your post has prompted me to look at BMC4052 on their page, which is the same manufacturer and pipe entries are only slightly different. I will contact them and enquire if mountings are compatible - if so I will go for this one.

 

Thanks to everyone- I think we may have a solution here

Stuart

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the KA solution i thought (might be wrong) was to be able to remotely mount it so it side on the other side of the car so it doesn't foul the inlet of the engine when fitting an engine other than the pinto eg a zetec.

 

There are sure to be others that can be adapted. how many pipes does it need to serve though? mine is a 3 pipe setup

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I bought a KA master cylinder when I got rid of my brake servo. It is used because it's a smaller bore than the Sierra one and compensates for the lack of servo. It was supposed to fit directly in place of the servo but needed an adaptor plate making to get it to sit vertical and then I realised the bonnet wouldn't close with it fitted as it sat too high on my 3A ( the 2B is apparently OK) so I had to take it off again. I'm currently running no servo, a Fiat 132 cylinder with custom made push rod and remote reservoirs.

 

When I was using the Sierra system I picked a Sierra master cylinder up off eBay with no problems.

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Hi all - received a replacement master cylinder today from Brakes International ie BMC4052, fits servo perfectly and only needs brake pipes to be bent slightly to fit different outlets. This is not a problem as I fitted then originally with plenty of spare. This looks like a good replacement for the original one ie K0236 311809.

 

The new M/c has come without a seal to fit between it and the servo, the seal on the old one is defunct- does this joint need to be airtight for the servo to work? If so I’m sure I can get one or indeed make something up

Stuart

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