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6. Check side clearance of compression rings with Feeler Gauge D81L-4201-A or equivalent by inserting it between ring and its lower land. Gauge should slide freely around entire ring circumference without binding.
Ring side clearance:
Top ring: 0.040-0.090mm (0.0016-0.0035 inch)
2nd ring: 0.030-0.080mm (0.0012-0.0031 inch)
Service limit:
Top ring: 0.15mm max (0.006 inch max)
2nd ring: 0.15mm max (0.006 inch max)
If clearance is greater than service limit, replace piston ring. If clearance exceeds service limit, even with a new piston ring, replace piston.
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