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