We just learned about the Head Gasket.
Some more parts of the engine block on a car are the Coolant Passages.
The pistons going up and down with the burning fuel makes a lot of heat for the engine.
To cool the engine down, there are little tunnels or passages that go through the engine, and when the engine is running there is cooling liquid that goes in one side of those holes and out the other.
The cool liquid helps keep the engine from overheating.
(from: wikipedia - engine block)
Kid Facts - Blast from the past: Encoder
