Isuzu 4JH1 User Manual

EXHAUST SYSTEM 6F – 9
EGR SYSTEM DIAGRAM 4JA1T (L)
RTW46AMF000301
EGR System Operation
Inspect EGR valve motion visually while changing engine RPM under no load condition after warming-up.
• Inspection point (Engine RPM)
RPM Idling
900 ∼ 960
2000 3250
Engine Front Side VSV-1 ON ON ON OFF
Engine Rear Side VSV-2 ON OFF ON OFF
ON means VSV should receive signal to move EGR valve.
OFF means VSV shouldn’t receive signal to move EGR valve.

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)