Plantoil/diesel conversion basics
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danalinscott

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Currently  the simplest way to convert a diesel tank to VO is to drain it, remove it from the vehicle, and install a "HotRod" probe type coolant heated fuel pickup.  If possible you want to also clean its interior since paraffin from diesel fuel can create a dirty wax buildup inside old diesel tanks and this tends to loosen when exposed to warm VO. This will probably quickly clog on-board filters for several thousand miles so it is a good idea to buy a case of cheap/disposable clear outer shell filters and install one in the VO line on the tank side of the VO filter where it is easy to swap out with a clean disposable filter.  It is also a very good idea to install a vacuum gauge so you can tell the filter is clogging before your engine simply starves for fuel and quits.

The HotRod How to file is available for purchase at: http://vegoilconversions.netfirms.com/newpage2.htm


Info on ordering a HotRod and 1"NPT weldable ports is at: http://www.websitetoolbox.com/tool/post/voconversionbasics/vpost?id=1958147&pid=18502701#post18502701


To install it you will need to have a 1" NPT port welded or brazed into the end of the tank as close to the tank bottom as possible. Bulkhead fittings can also be used if your tankis plastice. The HotRod will simply screw in to this. 

I also suggest that you have a second 1" NPT port added a few inches to the side of the one for installing the HotRod so if you wish to later you can install an inexpensive tank preheater (for use only in very cold conditions).  And finally...I suggest that a third 1" NPT port be installed in the lowest part of the tank so you can easily drain the tank if needed. 

You will also want to seal the existing fuel tank outlet/pickup.

Tips for swapping out the disposable filters: Keep a box of latex gloves next to the case of disposable filters.  If you pinch off the line on both sides of the disposable filter and grab it with a gloved hand to remove it you can then just remove the glove from your hand and the dirty filter is "bagged" inside the reversed glove. The wrist section can then be tied in a knot to seal the oil dripping disposable filter in for later disposal.

To clamp off the lines get two "needle nose" vise grip pliers and modify them by slipping a 2" section of fuel line over each metal jaw. This prevents them from damaging the fuel line being clamped off.


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danalinscott

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Reply with quote  #2 
Cleaning a diesel tank.
Drain the fuel from the tank.
Remove it and remove all the fittings.
Remove any residual fuel.
Shine a flashlight in one of the ports in the tank while looking on another. Look closely at the walls of the tank for a waxy/dirty layer. If you cant see any reach in with a rag on your hand and wipe the wall in several places. If the rag comes away fairly clean you have lucked out and do not need to pressure wash the tank. Set it out in the sun for a few days or stick a hairdryer in one of the large ports of the tank to speed the evaporation of any residual fuel in the tank if you plan on having any welding or brazing done on it. Even though diesel fuel is less flammable than gasoline most welders don't like to work on any fuel tank that still smells strongly of fuel.

If there IS a waxy/dirty buildup...
Rent a pressure washer. Make sure it has an angled head so you can reach all of the interior parts. Buy a few cheap magnets to stick on the tank later.


Then put on eye protection and a rain suit and blast away at the interior of the tank from every angle you can think of. When you think you have covered the entire interior of the tank rinse it out and using the flashlight look for any residue that may remain inside the tank. If you see any stick a magnet on the outside of the tank where the residue is inside.

Then blast away with the pressure washer some more.
When the tank is clean and rinsed use a rag to mop up any residual water and set the tank out in the sun for a few days or stick a hairdryer in one of the large ports of the tank to speed the evaporation of any residual water.


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Dana danalinscott@yahoo.com
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