Isuzu 4JH1 User Manual

ENGINE COOLING 6B – 1
SECTION 6B
ENGINE COOLING
TABLE OF CONTENTS
PAGE
Main Data and Specifications....................................................................................... 6B - 3
General Description .................................................................................................. 6B - 4
Coolant Flow.............................................................................................................. 6B - 4
Water Pump ............................................................................................................... 6B - 5
Thermostat................................................................................................................. 6B - 5
Radiator...................................................................................................................... 6B - 6
Diagnosis ....................................................................................................................... 6B - 7
Draining and Refilling Cooling System ....................................................................... 6B - 8
Water Pump ................................................................................................................... 6B - 10
Removal and Installation .......................................................................................... 6B - 10
Removal ..................................................................................................................... 6B - 10
Inspection and Repair............................................................................................... 6B - 11
Installation ................................................................................................................. 6B - 11
Thermostat..................................................................................................................... 6B - 13
Removal and Installation .......................................................................................... 6B - 13
Removal ..................................................................................................................... 6B - 13
Inspection and Repair............................................................................................... 6B - 13
Installation ................................................................................................................. 6B - 14
Radiator.......................................................................................................................... 6B - 15
Removal and Installation .......................................................................................... 6B - 15
Radiator and Associated Parts ................................................................................ 6B - 15
Removal ..................................................................................................................... 6B - 16
Inspection and Repair............................................................................................... 6B - 17
Installation ................................................................................................................. 6B - 18

Isuzu 4JH1 Specifications

General

Bore x Stroke	95.4 mm x 104.9 mm
Compression Ratio	18.5:1
Fuel System	Direct injection
Cylinder Configuration	Inline-4
Valves per Cylinder	4
Fuel Type	Diesel
Engine Type	Diesel, four-stroke
Displacement	3.0 liters
Maximum Torque	217 lb-ft (294 Nm) @ 1800 rpm
Oil Capacity	6.5 liters (with filter)