Lil Foot
Well-known member
Lifetime Member
Equipment
1979 B7100DT Gear, Nissan Hanix N150-2 Excavator
Compare it (in reverse) to a freeze plug heater or lower radiator hose heater- as the water gets hot, it rises in the system, forcing cold water to drop lower in the system to the heater, which heats the water, causing it to rise, etc., in a continuous loop until the block is warm. Thermosiphon cooling systems work the same way, but the engine provides the heat source, the hot water rises in the system, forcing cooler water from the radiator to drop to the lower part of the system, where it begins to rise after being heated by the engine, etc..