What I realized was that my flat plate heat exchanger was routed wrong. I had the coolant and the fuel going the same direction instead of opposite directions. I re-routed it so that the coolant would actually flow to my heated fuel filter then back to my heated pick up then back to the engine. I assume since it was hitting a block at the FPHE it never made the additional loop thus not heating my filter or pick up.
So I switched everything and I ran the car to get up to temp and to get the coolant flowing thru the whole system. It still would not heat up. So I took the coolant hose off the pickup in the tank (to see if coolant made it back there)and VO/diesel mix came out. Then I opened the radiator and there is VO/Diesel mix in it too.
Could this be a result of not routing the FPHE correctly? Is there a leak in my line in line? Is my new heated pickup faulty? I also assume dont drive the truck (duh) and empty the coolant system. But how should I clean it? Then also could one do all the testing to see if the car will work on diesel, then on VO with just using water, and if so then drain the water and actually put in coolant?
Also when changing your coolant is the water pump stronge enough to displace air and move the coolant thru the system, or should you prime your coolant lines similarly to priming a pump? I ask this because after switching the FPHE to the correct flow the coolant lines to the filter and the heated pickup never really heated. There was just mainly fuel in the coolant hoses, they were not full or overflowing.
1981 2x4 Diesel Pup DLX Long Bed
1986 4x4 Turbo Diesel Pup Space Cab (roomate moved out with it, but still see it often)
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The way to test a WVO system is to get all the coolant lines routed tank empty.. warm the truck up and feel/take temperature readings at all parts.. check anywhere for leaks etc.
Then get close off your coolant loop (you should have ball valves to shut the flow to your WVO system off), put diesel in the WVO tank and flip it over to "WVO" as you would normally... flip it back.
Then open the coolant, test with diesel.. finally add in your WVO
As far as cleaning the WVO out of the radiator.. drain fill, run, drain fill run and so on till you feel like it's out.