Sometimes, it’s not the pump itself that fails; it’s what drives the pump. While most automotive water pumps are driven by the engine through a belt, in some cars — especially hybrids ...

While the engine cooling system relies on a large network of parts, including a radiator, a thermostat, fluid channels, and a series of hoses, the heart of the system is the water pump.

[JohnnyQ90] is a fan of tiny internal combustion engines, and decided to whip up a little water pump for one of his so it could do something useful besides make noise. The pump is built out of ...