1. Measure: • piston ring side clearance Out of specification ^ Replace the piston and piston rings as a set.
Before measuring the piston ring side clearance, eliminate any carbon deposits from the piston ring grooves and piston rings.
Piston ring side clearance Top ring
0.030 - 0.065 mm (0.0012 - 0.0026 in) <Limit>: 0.115 mm (0.0045 in) 2nd ring
0.030 - 0.065 mm (0.0012 - 0.0026 in) <Limit>: 0.125 mm (0.0049 in)
2. Install: • piston ring (into the cylinder)
Level the piston ring into the cylinder with the piston crown.
@ 5 mm (0.20 in) 3. Measure: • piston ring end gap Out of specification ring.
Replace the piston
The oil ring expander spacer's end gap cannot be measured. If the oil ring rail's gap is excessive, replace all three piston rings.
Piston ring end gap Top ring
0.25 - 0.35 mm (0.0098 - 0.0138 in) <Limit>: 0.60 mm (0.0236 in) 2nd ring
0.7 - 0.8 mm (0.0276 - 0.0315 in) <Limit>: 1.15 mm (0.0453 in) Oil ring
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