remove the fuel tank and drain the water
Sugar will not dissolve in gasoline, it will become like syrup and clog the fuel filter and other engine parts. A little water may not do much, but too much water will cause your engine to stall.
Sugar sits on the bottom of the tank like sand unless you have some water in the tank also.
It will swell and burst
No, sugar sits on the bottom of the fuel tank like sand unless there is some water present.
Sugar water and diesel that is put in a fuel tank will ruin a cars engine. The sugar will sit for a few days before recognition, and the diesel could potentially be caught in the fuel filter.
they will die
You have to replace your fuel filter, water separator drain your tank and add fresh fuel. Sugar placed in the fuel tank will not harm your engine. Most fuel filters will have an absolute rating of 5 microns (give or take) and granulated sugar has a various micron size of between 20 and 150 microns. either way, it's to large to pass through your filter.
the glass tank explodes!xd
The water sinks to the bottom. If your pick-up in near the bottom your engine will quit. You will need to drain the tank.
It might cause your car to stall depending on how much was put in.
You will get warm instead of hot water. There is a tube inside the tank on the cold side that goes to the bottom of the tank and the hot comes directly from the top. Reverse them and you are going to get the cold water that settles to the bottom of the tank. It will not hurt the tank or anything, it just makes for poor hot water.