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 Rotary power output 3 Ignites the gasoline 4 Lets gas vapor in and exhaust out 5 These vaporize gasoline 6 Surrounds engine block 7 The carburetor sits on top of this. 8 The intake manifold is bolted to this. 9 Raises and lowers the valves 10 Pistons reciprocate in these 11 Connects pistons with crank shaft carburetor or fuel injector Piston rods Intake manifild Cam shaft Water jacket Cylinder heads Valves Crank shaft Cylinders Engine block Spark plugs