Piston Ring, Piston Ring Groove Wear Inspection

• Check for uneven groove wear by inspecting the ring seating.

The rings should fit perfectly parallel to groove surfaces.

If not, replace the piston and all the piston rings.

• With the piston rings in their grooves, make several measurements with a thickness gauge [A] to determine piston ring/groove clearance.

Piston Ring/Groove Clearance Standard:

Top 0.03 0.07 mm (0.0012
0.0028 in.)

Second 0.03 0.06 mm (0.0012
0.0024 in.)

Service Limit:

Top 0.17 mm (0.0067 in.)

Second 0.16 mm (0.0063 in.)