Building a propane kit for your vehicle can be very dangerous, so please is cautious. And use all safety procedures to keep yourself and others safe.
Measure car for accurate system placement for tank, converter, jets and primer switch. Make sure to keep these measurements on hand when purchasing the parts you need to purchase to build a propane kit for a vehicle. The length from the regulator to the intake, the heat hose or water hose to the regulator and regulator to primer switch and tank. These measurements will give you the hose and wire lengths you need to complete the kit.
Buy a tank, a regulator, brackets and a fuel hose from a supply store. The appropriate tank for this would be either 8 or 10 pound tank that would be equipped with a pressure gauge incorporated in the release valve. The regulator can be found at a business that specializes in propane parts and propane products, the appropriate gas converter is a must for the propane kit to work properly and safely.
Measure and purchase wire and switches from a local hardware store. You may substitute the toggle switch with any switch, like a door bell switch, or even a light switch, which will be used for priming the kit. The switch will load system with fuel preventing damage that could possibly result from cold starts that may potentially damage critical engine parts.
Contact your local auto part store to find the aluminum tubing, hose fittings, and reducer fittings needed for the converter, tie straps and hose clamps. The auto shop will also have specialty parts you need to have for your installation. Most kits must connect to the carburetor and or intake to inject the propane into the combustion chamber. Find the tools to connect the inlets for the propane jets.
Clearly mark the parts for future use or to make it easier for you to put everything together. Having the propane kit ready for installation clearly marked will help in putting the kit together. Do a mock-up sketch of the propane kit for the car it is intended for. Locate and list the important parts and the assembly instructions included.
After you've installed the kit and fueled the car make sure to check for any possible leaks near the filter and adjust the timing. Most cars are set to idle at a faster pace than needed for propane. Keep a watch on your spark plugs, from now on any problems on your now converted car may be traced to the spark plug. Remember to be safe and check and recheck fittings and hoses for leaks.