Matching Pairs Parts of an EngineOnline version To complete this worksheet, match the engine parts with what they do. by Alison Jack 1 Surrounds engine block 2 Lets gas vapor in and exhaust out 3 The carburetor sits on top of this. 4 Connects pistons with crank shaft 5 Covers the pistons 6 Pistons reciprocate in these 7 These vaporize gasoline 8 Rotary power output 9 Raises and lowers the valves 10 Ignites the gasoline 11 The intake manifold is bolted to this. Engine block Water jacket Piston rods Crank shaft Valves Cylinders Intake manifild Cylinder heads Cam shaft carburetor or fuel injector Spark plugs