Clutch Master Cylinder

Rhodrich · Post by **Rhodrich** » Mon Oct 15, 2007 7:07 am

Hello,

I've recently purchased a 1973 412, and have been going through it with a fine toothcomb.

I've noticed that the clutch master cylinder is weeping slightly, so will need replacement before too long. Does anyone have a source for these, or could anyone know where I can buy a rebuild kit?

Many thanks

Rhodri

raygreenwood · Post by **raygreenwood** » Mon Oct 15, 2007 5:27 pm

Do a search here. Lots of discussion. Sources are difficult but available. Beware if they are very old stock. They are likely to have hardened cups and will soon leak. However...you can take the cups and flap valves from a vanagon master cylinder, lap your cylinder carefully...and it works perfectly. You cannot use the vanagon pistons though. Yours should work perfect unless they have bad corrosion under the brass flap valves.

You can also build a simple bracket and bolt the vanagon cylinder right up. You may need o have a flare addapter made for teh steel line...I can't remember. Take a look at one...and teh light bulb will go on in your head right away. Ray

Rhodrich · Post by **Rhodrich** » Tue Oct 16, 2007 1:50 am

Thanks Ray.

Through the wonders of the internet, I've now managed to get hold of a NOS one. I'll be sure to take your advice and have a look at the seals once it comes though the post. Let's hope it's been stored correctly.

raygreenwood · Post by **raygreenwood** » Tue Oct 16, 2007 9:26 am

Oh....be sure...to clean all new master cylinders carefully in denatured alcohol. Its really worth it to disassemble the cylinder all the way. By that I mena just the spring assembly, lower/inner cup and brass flap valve. hey tend to get assembly grease an sop grit gummed up in there. Ray