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