If the piston ring end gaps are too large, what action is recommended?

When the piston ring end gaps are too large, the recommended action is to replace the rings with new ones. Over time, piston rings can wear down, which can lead to increased end gaps that fail to provide a proper seal during the engine's operation. This can result in reduced compression, inefficient operation, and increased oil consumption, as well as exhaust emissions.

Replacing the worn piston rings ensures that the engine can maintain its efficiency and performance. Simply adjusting or dressing the rings will not remedy the wear issue; as adjustments might not restore the necessary sealing properties required for optimal engine function. Therefore, purchasing new rings is the most advisable action to ensure the integrity and performance of the engine.