How do you measure piston ring groove wear?

Piston ring groove wear can be measured using a dial indicator or a micrometer to assess the groove's width and depth against the manufacturer's specifications. A visual inspection may also reveal signs of wear such as scoring or abnormal wear patterns. Additionally, the use of a feeler gauge can help determine if the clearance between the ring and groove exceeds acceptable limits. Regular monitoring of these measurements can help identify wear trends and inform maintenance decisions.