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Isuzu 4JG2 User Manual

Isuzu 4JG2
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00 – 48 SERVICE INF
ORMATION
7.
Rotate the crankshaft to bring the piston in the No. 1
cylinder to a point 30 - 40° BTDC.
8. Set the timing gauge needle to zero.
9. Move the crankshaft pulley slightly in both directions
to check that the gauge indication is stable.
10. Turn the crankshaft clockwise and read the gauge
indication when the crankshaft pulley timing mark is
aligned with the pointer.
mm (in)
4JB1 BTDC 14°
4J
B1T BTDC 11°
4J
B1TC BTDC 4°
4J
G2 ATDC 2°
Standar
d Reading mm (in)
0.5 (
0.02)
If
the injection timing is outside the specified range,
continue with the following steps.
11.
Loosen the injection pump fixing nuts and bracket
bolts.
12. Adjust the injection pump setting angle.
When large than
standard value
When smaller than
standard value
G
ear drive A B
A :
Move the injection pump toward the engine.
B : Move the injection pump away from the engine.
Tighten the pump fixing nut, adjust bolt and pump
distributor head plug to the specified torque.
Pump Fixing Bolt Nm (kgm/lbft)
24 (
2.4/17)
Adj
ust Bolt Nm (kgm/lbft)
19 (
1.9/14)
Inj
ection Pump
Distributor Head Plug Nm (kgm/lbft)
17 (
1.7/12)
CA
UTION
Whe
n installing the distributor head/plug, be sure
to use new copper washer.
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Isuzu 4JG2 Specifications

General IconGeneral
Fuel SystemIndirect injection
Cooling SystemWater-cooled
Fuel TypeDiesel
Displacement3.059 L (3059 cc)
Bore x Stroke95.4 mm x 107 mm
Torque Output2000 rpm
ValvetrainOverhead valve (OHV)

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