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6A3-68 ENGINE MECHANICAL (Z13DT ENGINE)
Piston Pin
• Check piston pin, connecting rod small end bore and piston
bore for wear or damage, paying particular attention to con-
dition of small end bore bush. If pin, connecting rod small
end bore or piston bore is badly worn or damaged, replace
pin, connecting rod and/or piston.
• Piston pin diameter:
Measure piston pin diameter, connecting rod small end bore
and piston bore.
If it is out of specification, replace piston, piston pin and/or
connecting rod.
Piston pin diameter
22.982 – 22.987 mm (0.90481 – 0.90500 in.)
Connecting rod small-end bore
22.990 – 22.996 mm (0.90512 – 0.90535 in.)
Piston bore
23.006 – 23.012 mm (0.90575 – 0.90598 in.)
Piston Rings
Piston ring end gap
To measure end gap, insert piston ring (1) into cylinder bore and
then measure the gap by using thickness gauge (2).
If measured gap is out of specification, replace ring.
NOTE:
Decarbonize and clean top of cylinder bore before insert-
ing piston ring.
Piston ring end gap
Top ring: 0.20 – 0.30 mm (0.0079 – 0.0118 in.)
2nd ring: 1.00 – 1.50 mm (0.0394 – 0.0590 in.)
Oil ring: 0.25 – 0.50 mm (0.0099 – 0.0196 in.)
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