Use the micrometer to measure at several points around the ring.
Piston Ring Thickness Standard:
Top [A] 0.77
0.79 mm (0.0303
0.0311 in.)
Second [B] 0.78
0.79 mm
(0.0307
0.0311 in.)
Service Limit:
Top 0.70 mm (0.0276 in.)
Second 0.71 mm (0.0280 in.)

If any of the measurements is less than the service limit on either of the rings, replace all the rings.
NOTE
When using new rings in a used piston, check for uneven groove wear. The rings should fit perfectly parallel to the groove sides. If not, replace the piston.
Piston Ring Groove Width Inspection
Piston Ring End Gap InspectionOil Pan Installation
If the oil filter holder bolt [A] was removed, tighten it.
Apply a non-permanent locking agent to the threads of
the oil filter holder bolt.
Torque - Oil Filter Holder Bolt: 35 N·m (3.6 kgf·m, 26 ft·lb)
Replace the O-rings [B] with new ones, and apply grease
to them.
Install the O-ri ...
Shift Fork/Gear Groove Wear Inspection
Measure the thickness of the shift fork ears [A], and measure
the width [B] of the gear grooves.
If the thickness of a shift fork ear is less than the service
limit, the shift fork must be replaced.
Shift Fork Ear Thickness
Standard: 5.7 6.0 mm (0.224
0.236 in.)
Service Limit: 5.6 mm ...
Warning Indicator Light (Red)
This red warning indicator light and
the oil pressure warning symbol ( )
should go on whenever the ignition
switch is turned to “ON” and go off after
starting the engine.
A. Warning Indicator Light (Red)
B. Warning Symbols
This red warning indicator light has
the two warning function ...