Isuzu NKR 4J Series - Engine Cooling; Starting System

00 – 32 SERVICE INFORMATION
Engine Cooling
Cooling system
Radiator
Heat radiation capacity kcal/h
Heat radiation area m
2
(ft
2
)
Front area m
2
(ft
2
)
Dry weight N (Kg/lb)
Radiator cap
Valve opening pressure kPa (Kg/cm
2
/psi)
Coolant capacity lit (Imp.qt./US qt.)
Coolant forced circulation
(2 tube in row) Tube type Corrugated
71400
11.78 (126.8)
0.216 (2.325)
105 (10.7/23.6)
88.2 - 116.7 (0.899 - 1.199/12.78 - 17.05)
3.1 (2.73/3.28)
(For EC 5.8 (5.1/6.13))
Coolant pump
Pulley type
Pulley ratio
Centrifugal impeller type
1.2
Thermostat type
Valve opening °C (°F)
Valve full open °C (°F)
wax pellet with jiggle valve.
Without jiggle valve (Thailand only)
82 (180)
95 (203)
Coolant total capacity Iit (Imp.qt./US qt.) 10 (8.80/10.57) (For EC 7.3 (6.42/7.71))
Starting System
Manufacturer DENSO
Engine Model 4JB1 / 4JB1T / 4JB1TC 4JG2 (G.EXP & EC)
Rating
Voltage V 12
Output kW 2.0 2.2
Time Sec 30
Number of tooth of pinion 9
Rotating direction (as viewed from pinion) Clockwise
Weight (approx.) kg 4.6 5.4
No-load characteristics
Voltage/current V/A
Speed rpm
11.5/100 or less
3700 or more
Load characteristics
Voltage/current V/A
Torque N•m(Kg•m/lb•ft)
7.5/500 or less
13.7 (1.4/10.1)
Speed rpm 1200 or more 1400 or more
Locking characteristics
Voltage/current V/A
Torque N•m(Kg•m/lb•ft)
2.4/800 or less
18 (1.8/13) or more
2.0/850 or less
16 (1.6/12) or more