Miscellaneous Technical Modifications - Contents

Installing a new flexible plastic high pressure LP Gas (Propane) pipe

I had to replace the LP Gas vaporizer, cutoff valve and filter, because I couldn't install the master cylinder and brake booster from my new brake system. And because you may not extend the already existing high pressure copper pipe, I dicided to install a completely new high pressure pipe. A flexible plastic one. Much easier to install than a copper pipe. The vaporizer/cutoff valve & filter will be installed at the right side of the engine bay. This means the high pressure plastic pipe will be at the right side as well.

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The first step

I had to drill a large hole into the trunk. This is the exit hole, for the plastic pipe, to the underside of the vehicle. The high pressure pipe is 8mm, but the rubber hose which protect the high pressure pipe is 16mm. This way the high pressure pipe is protected from the sheet metal of the exit hole. You can see the high pressure pipe just exiting the grey pipe, going down through the hole in the trunk.


A closeup. Unfortunately you can't see it very clearly. Everything is black. I had to spray the drilled hole with an anti corrosion paint. The plastic high pressure pipe and the rubber hose are black as well.


This is where the plastic pipe exits the trunk under the car. At this point the plastic pipe is not yet attached to the frame with special fasteners.

 

The plastic hose has it's own special crimp connectors. This has to be tough enough to keep 8 to 12 bar (the pressure depends on the outside temperature) from escaping into the air.


This means the flexible plastic pipe can be connected to the LP Gas tank. It screws onto the cutoff valve. That's the reason you can disconnect the high pressure line from the tank. The cutoff valve keeps the gas into the tank. The rubber grommet and the electical wiring have to be installed/connected yet.

So now to the front of the car, the right side of the engine bay

The vaporizer has to be installed first. Only than I can figure out where to drill a big hole for the plastic pipe. Here I just finished installing the vaporizer/cut off valve & filter.


Top view.


The cutoff valve and filter canister.


Drilled the hole for the high pressure line.


Crimped the connector to the high pressure line and connected the line to the filter canister.


All hoses are connected again. The LP-Gas vaporizer is in series with the heater in the coolant circuit.. And to make sure, a couple of inline airbleed/inspection connection pieces are in both hoses. A new low pressure LP-Gas hose is between the vaporizer and the mixer.


All electrical wiring is connected again. At the tank and up front, in the engine bay. I have tested it and it works well. And no leaks, as far I could see.


This was all. The LP-Gas installation is working again.