1998 ISUZU TROOPER Service Repair Manual

Page 1033 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±77
ENGINE MECHANICAL
Piston and Connecting Rod
Piston, Connecting Rod and Associate Parts
015RW019
Legend
(1) Cylinder Head Assembly
(2) Cylinder Head Gasket
(3) Crankcase with Oil Pan
(4) Oil Pip

Page 1034 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±78
ENGINE MECHANICAL
015RS031
Remove any ridge or carbon build up from the top
end of the cylinder.
9. Remove the piston rings (8) with a piston ring
expander. Arrange the removed piston rings in

Page 1035 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±79
ENGINE MECHANICAL
015RV014The size mark (1) for piston outside diameter is
represented as shown in illustration below.
Outside Diameter
Size Mark A : 93.360 mm±93.370 mm
(3.6756 in±3.6760 in)

Page 1036 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±80
ENGINE MECHANICAL
015RS026
Positioning mark (1) is painted as shown in the
illustration.
Marked T : No.1 Compression ring
Marked T2 : No.2 Compression ring
015RS027
2. Measure the clearance be

Page 1037 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±81
ENGINE MECHANICAL
Connecting Rods (11)
1. Check the connecting rod alignment If either the bend
or the twist exceeds the specified limit, the connecting
rod must be replaced.
Bend per 100 mm (3

Page 1038 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±82
ENGINE MECHANICAL
4. Reinstall the rod caps (12) to their original
positions.
Tighten the rod cap nuts.
Torque: 54 N´m (5.5 Kg´m/40 lb ft)
NOTE: Do not allow the crankshaft to rotate.
5. Remo

Page 1039 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±83
ENGINE MECHANICAL
Attach the piston to the connecting rod with the
piston front mark and the connecting rod front mark
on the same side.
015RS036
With 5±8840±0551±0 Piston pin service set

Page 1040 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A±84
ENGINE MECHANICAL
Tighten the connecting rod cap nuts
Torque : 54 N´m (5.5 Kg´m/40 lb ft)
NOTE: Do not apply engine oil to the bearing back faces.
6. Oil gallery, refer to ªCrankshaft and m