1998 ISUZU TROOPER Service Repair Manual

Page 1817 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A– 84 ENGINE MECHANICAL
PISTON AND CONNECTING ROD
5
8
7
3
1
2 6
4
012RW061
Legend
(1) Cylinder Head Assembly
(2) Crank Case
(3) Connecting Rod Bearing Cap(4) Connecting Rod
(5) Piston Ring
(6) Pist

Page 1818 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A– 85
DISASSEMBLY
1. Cylinder Head Assembly
1) Refer to “Cylinder head” in this manual.
2. Crank Case Assembly
1) Refer to “Crank Case” in this manual.
3. Connecting Rod B

Page 1819 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A– 86 ENGINE MECHANICAL
Legend
(1) Piston Grade
(2) Piston Front Mark
(3) Part Number
The grade for piston outside diameter is stamped
on the piston head.
Measure the cylinder bore diameter at meas

Page 1820 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A– 87
Discerning Mark
Piston Ring Discerning Mark
1st compression ring 1N
2nd compression ring 2N
Ring End Gap mm(in)
Piston Ring Standard Gap Limit
1st 0.25 –0.40
compression r

Page 1821 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A– 88 ENGINE MECHANICAL
2. Measure the inside diameter of the connecting rod
small end. If the clearance between the small end
and pin does not conform to the specified value, the
connecting rod or

Page 1822 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A– 89
3. Measure the oil clearance between the connecting
rod and the crankshaft.
1) Remove the connecting rod cap nuts and the
rod caps.
Arrange the removed rod caps in the cylin

Page 1823 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A– 90 ENGINE MECHANICAL
5. Piston Ring
1) Install the piston rings with the piston ring
expander.
The compression ring must be set with the 1N,
2N mark facing up.
2) Discerning mark is stamped as s

Page 1824 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A– 91
Legend
(1) 1st compressor ring gap
(2) 2nd compressor ring gap
(3) Oil ring gap
3) Insert the piston/connecting rod assemblies into
each cylinder with the piston ring compre