• Measure the piston ring groove width.
OUse a vernier caliper at several points around the piston.
Piston Ring Groove Width
(0.0327 ~ 0.0335 in.) Second [B] 0.82 ~ 0.84 mm (0.0323 - 0.0331 in.)
★ If the width of any of the two grooves is wider than the service limit at any point, replace the piston.
Service Limit 0.93 mm (0.037 in.) 0.92 mm (0.036 in.)
Piston Ring Thickness • Measure the piston ring thickness. OUse the micrometer to measure at several points around the ring.
Piston Ring Thickness
Service Limit 0.70 mm (0.028 in.) 0.70 mm (0.028 in.)
(0.0303 ~ 0.0311 in.) Second [B] 0.77 ~ 0.79 mm (0.0303 ~ 0.0311 in.)
★ If any of the measurements is less than the service limit on either of the rings, replace all the rings.
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