Replacement Brake Master Cylinder UK Based

[thelatestcraze]

Hi there. I wonder if anyone can help. I need to replace the brake master cylinder on my 1973 RHD 3.0 CSA. I purchased a replacement on eBay but it does not fit, as the end is too big to fit to the bulkhead. The listing stated that it would fit my car and the part number was specified as 34311120832. I've attached some photos of the one which was taken out of my car and you can see the damage where it attaches to the bulkhead. The outlets are on the same side and I can't see any replacements that match mine. The bore diameter seems to be 23.81mm. In one of the photos I've also shown the one I purchased on eBay along side the original. Any advice on where I could buy a new one that would fit would be much appreciated. Many thanks.

 

[HB Chris]

Your replacement is for a LHD coupe, 23.8 is 15/16”.

 

[thelatestcraze]

Thanks for the reply. That’ll explain it. The listing said it fitted a RHD coupe so it looks like they made a mistake in the listing. A brake master cylinder for RHD E9 seems a lot harder to find then!

 

[TomHom]

I wouldn't say so:

The NOS one I'm not willing to give away, at least not for now.
If you are interested in the other one let me know. I could get it refurbished first.

Thomas

 

[thelatestcraze]

Hi Thomas. Many thanks for the message. That could be the perfect solution. Have you a rough idea of cost?

 

[TomHom]

Let me have a look inside first. I will come back to you tomorrow.

 

[thelatestcraze]

That’s great thanks Thomas. Much appreciated.

 

[TomHom]

Well, curiosity let me open it right wayLooks good! Also the inner wall of the cylinder looks perfect, only some rust in the bottom part where the big spring is located.
Let me check tomorrow if the sealings are available, but hopefully not this set covering all parts

Repair kit for master cylinder RHD you need 1 for 1 car

Repair kit for master cylinder RHD you need 1 for 1 car

www.wallothnesch.com

 

[thelatestcraze]

That’s looking good. Funnily enough, I bought a rubber seal kit from Jaymic prior to finding out about the damage so already have the following kit:

(E9 2.5CS-3.0CSL) Brake Master Cylinder Repair Kit RHD (J) – Jaymic BMW Parts

Aftermarket set of brake master cylinder internal seals (five seal version) for all RHD E9 models.

www.jaymic.com

 

[TomHom]

So, the easiest way for me would be asking 100€ plus shipping from Germany.
Thomas

 

[thelatestcraze]

That would be great thanks Thomas. I’ll message you in the morning to confirm things. Thanks for your help.

 

[TomHom]

Check! Might do some glass blasting on the exterior plus coating at reasonable price!