Which components must be aligned during reassembly for proper engine function?

The alignment of the crankshaft and camshaft gears is essential during the reassembly of an engine because they are critical in maintaining the correct timing of the engine’s operation. The crankshaft is responsible for converting the linear motion of the pistons into rotational motion, while the camshaft controls the opening and closing of the engine’s valves at the appropriate times. If these gears are not aligned properly, the timing of the valve movement can be off, leading to poor engine performance, misfires, or even severe engine damage.

Proper alignment ensures that the pistons move up and down in sync with the valves opening and closing, allowing for optimal combustion and efficient operation of the engine. Thus, ensuring that these components are correctly aligned is a fundamental step in engine assembly that directly impacts engine reliability and functionality.