What is the piston ring end gap?

The piston ring end gap refers to the distance between the ends of a piston ring when it is placed into the cylinder bore, indicating how much space there is between the ring ends. This gap is crucial for the proper function of the piston rings as it allows for the expansion of the ring material when it heats up during engine operation. If the gap is too small, the rings may bind or break; if too large, it can lead to increased oil consumption and decreased engine efficiency.

Understanding this concept is important because the piston ring end gap plays a significant role in engine performance, sealing, and longevity. The specifications for the end gap are usually provided by the manufacturer and must be adhered to for optimal engine function.