Did you know that you’re supposed to bleed a master cylinder? This is one of the things I’ve learned in my refreshing and updating of my Van’s brake system.
To do a Vanagon master cylinder properly you need to buy two of the bleeding kits as you need two of the exact same size fitting and every kit I’ve ever seen only comes with a single fitting for every size imaginable.
Here’s the current shape of my master cylinder, as I said in a previous post I went to drive it and found the master cylinder bone dry. I ended up filling it up again to try and chase down the leak.