Use the micrometer to measure at several points around the ring.
Piston ring thickness
Standard | Service Limit | |
Top | 0.77-0.79 mm | 0.70 mm |
Second | 0.77-0.79 mm | 0.70 mm |
★ If any of the measurements is less than the service limit on either of the rings, replace all the rings.
Note. When using new rings in a used piston, check for uneven groove wear. The rings should fit perfectly parallel to the groove sides. If not, replace the piston.