Brake Bleeder Universal Cap

This is a universal brake master cylinder cap that works with the Motive Brake Bleeder. I was surprised to find that the company doesn't make a cap for the older Hondas. They do have a universal cap (similar to this instructable), but I chose to make one myself because I was in a rush and it was cheaper.

Before you start this, you should see if you have the tools and materials on hand. If not, then it might be cheaper to just buy the universal cap from Motive. Overall it was about $10 in materials for me.

These are the measurements on the materials that I used. Depending on how tall your master cylinder is will determine on how wide and deep the c-clamp you'll need. I used this aluminum which I already had, but you might be able to get by with wood or another material. The rubber is just a universal gasket that you can buy at any local hardware store and it was only $3.50

The master cylinder reservoir on my car is 3", so I made the lid 4"x4". You'll have to measure yours and also take into consideration if it fit's with all of the other hoses/things that might get in the way. After marking it out, I cut it with a bandsaw. Next I marked the center of the square, closed my clamp on it, then traced it with a knife to score the metal so that it can be used to help me center the cap on the reservoir when I use it. Next I used the metal as a template to cut the rubber gasket to size. You'll also need to cut a hole in the rubber for the NPT fitting.

You'll want to place the NPT fitting as close to the center as you can so that it will fit within the reservoir, but not interfere with the clamp. I drilled a 5/16" hole and tapped it for the 90 degree 1/8" NPT to 1/4" barb. Connect 1/4" clear tubing between that fitting and the 1/4" NPT male to 1/4" barb, then fasten each end with zip ties.

That's it! Just try to center it as best you can on the reservoir so that it clamps evenly for a good seal and remember not to overtighten it and damage the plastic reservoir. Also, be sure to rinse everything with water and dry it before using so that you don't contaminate or introduce moisture to your brake system. I put 15 psi through it without issue.