Line drawing showing how to check piston ring side clearance wit…

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.

Owner caption January 2005 · Photo 102 of 980