1998 ISUZU TROOPER Service Repair Manual

Page 1577 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 27
NOTE:
Do not allow the crankshaft to rotate.
9) Remove the main bearing caps.
10) Measure the plastigage width and determine the
oil clearance.  If the oil clearance exceeds

Page 1578 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 28 ENGINE MECHANICAL
Crankshaft inspection
Inspect the surface of the crankshaft journals and crank
pins for excessive wear and damage.
Inspect the oil seal fitting surfaces for excessive wear a

Page 1579 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 29
Crankshaft Bearing Selection
When installing new crankshaft bearings or replacing old
bearings, refer to the selection table below.
Select and install the new crankshaft bea

Page 1580 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 30 ENGINE MECHANICAL
REASSEMBLY
14. Crankshaft
·Install the main bearings to the cylinder body and
the main bearing caps.
·Be sure that they are positioned correctly.
·Apply new engine oil to

Page 1581 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 31
·Install the bearing caps with the bearing cap head
arrow mark facing the front of the engine.
·Apply engine oil to the crankshaft bearing cap bolts.
·Tighten the cranksh

Page 1582 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 32 ENGINE MECHANICAL
19 (1.9/14)N·m(kg·m/lb·ft)
5. Timing Gear Case
1) Install the timing gear case to the cylinder body.
NOTE:
Take care not to twist the front oil seal.
6. Flywheel
1) Thoro

Page 1583 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 33
2) Tighten the timing gear case bolt together with
the timing gear case gasket to the specified
torque.
19 (1.9/14)N·m(kg·m/lb·ft)
3) Cut away the gasket protruding above

Page 1584 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 34 ENGINE MECHANICAL
PISTON AND CONNECTING ROD
DISASSEMBLY
1. Cylinder Head Assembly
·Refer to ÒCylinder headÓ in Section 6A2.
2. Crankcase Assembly
·Refer to ÒCrankcaseÓ in Section 6A2
3.