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