Carburetor. The piston is closed at one end and open on the other end to permit direct attachment of the connecting rod and its free action. Timing belt. Contain the intake and exhaust valves Governor Engine Failure Analysis Ernst Greuter,Stefan Zima, Engine failures result from a complex set of conditions, effects, and situations. Crank Shaft. Intake manifold. Piston. Flywheel. Has a main function of guiding the piston. To understand why engines fail and remedy those failures, one must understa