Isuzu Trooper (1998-2002 year). Service manual — part 572
6A – 96 ENGINE MECHANICAL
NOTE: Check to see that the crankshaft turns
smoothly by rotating it manually.
4. Piston Assembly
1) Refer to “Piston and connecting rod” in this
manual.
5. Cylinder Block Side Cover Right and Left
6. Balance Shaft Right.
Apply new engine oil to the balance shaft (right) and
insert it into cylinder block.
7. Timing Gear Case
1) Cut out the liquid gasket forced out from
between the contact surface of cylinder block
and crankshaft.
2) Apply liquid gasket (TB1207B or equivalent) to
the fitting surface of the cylinder block and
crankcase.
3) Install timing gear case with gasket to cylinder
block and tighten to specified torque.
Torque: 20 N·m (2.0 kg·m/14 lb ft)
8. Crankshaft Gear
Force key into crankshaft and force in crankshaft
gear along the key groove using a special tool (1)
with the crank gear (2) timing mark facing outside.
9. Install timing gear align the timing mark on each
timing gear.
For alignment of timing marks refer to “Timing
Gear” in this manual.
NOTE: Remove the locking bolt or pin from idle gear A
and idle gear C.
10. Assembling the gear case cover.
1) Install the oil seal on the oil pump assembly
before installing the gear case cover.
2) Apply liquid gasket to timing gear case.
NOTE: Be sure to apply liquid gasket evenly.
8
4
1
5
9
6
10
2
3
7
012RW027
012RW064
1
2
2
012RW066
2
2~2.5mm
2~2.5mm
Apply liquid gasket around inside
of the bolt hole
Bolt hole
Inside
Outside
F06HX00001
ENGINE MECHANICAL 6A – 97
11. Use the special tool to install the crankshaft front oil
seal to timing gear case.
Front Oil Seal Installer: 5-8840-2061-0
1) Check fit-of the oil seal and gear case cover at
the front end.
Standard: 0.5 – 2.5 mm (0.0197 – 0.0984 in)
NOTE: Apply engine oil to oil seal lip before installation
of the seal.
12. Install the oil pan assembly to original position and
tighten to specified torque.
Torque: 22 N·m (2.2 kg·m/16 lb ft)
13. Crankshaft Rear Oil Seal
1) Tighten the adapter to the crankshaft rear end
with 2 bolts.
2) Insert the oil seal into the adapter.
NOTE: Apply oil to oil seal lip.
3) Insert the sleeve into the adapter and tighten it
with a bolt (M12 x 1.75L = 70) until the adapter
hits the sleeve.
4) Remove the adapter and the sleeve.
5) With the seal pressed in, check the dimension of
the oil seal outside end and crankshaft end.
Standard Dimension = 12.5 ± 0.3 mm
Oil Seal Installer: 5-8840-2359-0
14. Cylinder Block Rear Plate (A/T Model)
1) Tighten the cylinder block rear plate fixing bolts
to the specified torque.
Torque: 97 N·m (9.9 kg·m/72 lb ft)
15. Flywheel Housing (M/T Model)
1) Install flywheel housing aligned with the dowel
pin on the cylinder block.
2) Tighten the flywheel housing fixing bolts to the
specified torque.
Torque: 97 N·m (9.9 kg·m/72 lb ft)
16. Flywheel
1) Refer to “Crankshaft” in this manual.
17. Cylinder Head Assembly
1) Refer to “Cylinder Head” in this manual.
015RW074
12.5 + 0.3
–
012RW067
6A – 98 ENGINE MECHANICAL
OIL PUMP ASSEMBLY
2
1
5
6
3
4
012RW097
Legend
(1)
Flywheel
(2)
Rear Plate (A/T)
(3)
First Oil Pump Assembly
(4)
Second Oil Pump Assembly
(5)
O-Ring (For first oil pump)
(6)
O-Ring (For second oil pump)
REMOVAL
1. Disconnect battery ground cable
2. Lift up car
3. Drain engine oil
NOTE: Install drain plug with new gasket.
4. Flywheel
5. Rear Plate (A/T) or Flywheel Housing (M/T)
6. First Oil Pump Assembly and Second Oil Pump
Assembly
1) Remove oil pump assembly from cylinder block
and crankcase.
INSTALLATION
1. First oil pump assembly
1) Set O-ring to oil pump.
2) Install oil pump drive gear to the rear end of the
balance shaft RH.
3) Apply engine oil to pump gear, install pump gear
to rear end of cylinder block with specified
torque.
Torque: 20 N·m (2.0 kg·m/14 lb ft)
2. Second oil pump assembly
1) Set O-ring to oil pump.
2) Install oil pump drive gear to the rear end of the
balance shaft LH.
3) Apply engine oil to pump gear, install pump gear
to rear end of crank case with specified torque.
Torque: 20 N·m (2.0 kg·m/14 lb ft)
3. Install rear plate (A/T) or flywheel housing (M/T)
Torque: 97 N·m (9.9 kg·m/72 lb ft)
4. Install flywheel
1) Apply engine oil to bolt and tighten with angular
tightening method.
1st step:
59 N·m (6.0 kg·m/43 lb ft)
2nd step:
60° to 90°
3rd step:
60° to 90°
ENGINE MECHANICAL 6A – 99
OIL COOLER
For Europe
1
2
050R200001
Legend
(1)
Oil Cooler Assembly
(2)
Oil Filter Cartridge
OIL FILTER CARTRIDGE
REMOVAL
1. Place a receptacle beneath the oil filter to contain
the drained oil.
2. Remove the oil filter cartridge using filter wrench.
Filter wrench : 5-8840-0203-0
INSTALLATION
1, Lightly apply oil to the O-ring of oil filter cartridge.
2. Turn the new oil filter cartridge by hand until the
sealing face is fitted against the O-ring.
3. Use the filter wrench to turn the oil filter an
additional one and 1/8 turns.
4. Start the engine and check for oil leakage from oil
filter.
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