Sold for asking price, the buyer mentioned that they use this motor in military grade drones.  Any confirmation on this?

Does anyone have a guide on getting to the high pressure fuel pump and removing it?    I'm going up to my mother's soon and would like to take it off and switch with a known good pump from my running car 

Although it doesn't 'boil' the water, it's very possible. I purchased a tracer, I suspect the water pump.

It's got to be a head gasket slowly letting go, if there is no sign of a leak under the car.

Every 3 months I lose 1 l of antifreeze ... where? The oil is black, not emulsified, the smoke is colorless and only during brutal acceleration is it black so there is a crack in the cooling circuit. Where could it be?