Isuzu 2000 Trooper Workshop Manual page 790

D Positioning mark (1) is painted as shown in the
illustration.
Marked T : No.1 Compression ring
Marked T2 : No.2 Compression ring
2. Measure the clearance between the piston ring
groove and the piston ring with a feeler gauge. If the
piston ring groove / piston ring clearance exceeds the
specified limit, the piston must be replaced.
Compression Ring Clearance
Standard : 0.016 mm–0.038 mm
(0.0006 in.–0.0015 in)
Limit : 0.15mm (0.0059 in)
015RS026
Piston Pin (9)
NOTE: Do not reuse the old piston pin.
1. Use a micrometer to measure the new piston pin
outside diameter in both directions at three different
positions.
2. Measure the inside diameter of the connecting rod
small end. If the fitting interference between the small
end and pin does not conform to the specified value,
the connecting rod must be replaced.
Standard : 0.023 mm–0.038 mm (0.0009
in–0.0015 in)
015RS027
ENGINE MECHANICAL 6A–77
015RS028
015RS029