This is a view of the Pollack change over valve mounted at the front of the engine bay, just in front of the injector pump. The copper tube assembly is the end of the heat exchanger, the thin 8mm tube containing the Waste Vegetable Oil (WVO) from the second tank. This type of valve is essential to any WVO conversion due to the fact that two seperate fuel tanks are needed. This valve has the added advantage that it can switch between fuel tank contents senders, utilising the vehicles single fuel gauge. I found that there is no easy way to mount this valve as one set of pipes will always be in an awkward position relative to the others.
This is the modification required to be added to a second tank in order to heat the oil and make it less viscous. The perspex panel was installed to enable viewing for prototyping purposes. At this stage anything can go wrong!!! (A slight leak was fixed later.) The panel is hinged in case the WVO is more solid than expected so it can be "shovelled" in.
SECOND TANK "SHOE HORNED" IN THE BOOT. I think this picture speaks for itself. I was extremely lucky on ebay to get a tank that fitted like this one did. It holds an impressive 10 gallons.
It is now swathed in foil backed loft insulation which has proved to be brilliant in heat conservation. No small thing as this cuts down, if not eliminates "heating up time" when the vehicle is started up on normal diesel. The fuel reaches temperatures of 70 degrees + on a decent journey and is still around 50 degrees 12 hours later!
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July, 2008