Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
Re: CJ Master Cyl. Upgrad/Replacement
MC rebuild kit is cheap and easy.
Unboosted brakes are working for you, and they will continue to work just as well if the engine dies. I'd stick with that.
Before you get carried away, carefully examine the diaphragm between the cover and the MC casting. It looked to me like the leak was coming from under the cover. I was going to look at it at the campground but forgot.
Also the spring that holds the cover down seemed a little weak, although probably still strong enough. You can tweak the bends a little to tighten it up.