Which component should be installed first when dealing with piston rings?

The oil control ring should be installed first when dealing with piston rings due to its function and placement within the ring pack. The oil control ring sits at the bottom of the ring assembly and is responsible for managing the lubrication of the cylinder walls by controlling the amount of oil that reaches the combustion chamber.

By positioning the oil control ring first, you ensure that it can be properly seated in the groove before adding the compression rings, which are designed to create a seal for combustion. Installing the oil control ring first also helps prevent damage to the compression rings that might occur during their installation. This order of installation is critical for achieving proper function, longevity, and optimal performance of the engine's pistons and rings.

The engagement and alignment of the rings is essential for maintaining engine efficiency and preventing oil consumption issues, making the installation order not just a procedural step, but a necessary one for reliable engine function.