Isuzu Diesel Engines Isuzu L Series Engines Isuzu J Series Engines Isuzu B Series Engines Isuzu Engine Listing
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Isuzu L Series Engines

Introduction 3LB1, 3LD1, 4LE1, 4LE2

Engine Model 3LB1 3LD1 4LE1 4LE2
Engine Characteristics 4 Cycle, Water Cooled, Vertical In-Line
Valvetrain Configuration Overhead Valve
Type of Aspiration Naturally Aspirated
Type of Injection Indirect Direct
Number of Cylinders 3 3 4 4
Bore x Stroke 3.05 x 3.14 in
(77.4mm x 79.7mm)
3.27 x 3.62 in
(83.1mm x 92mm)
3.35 x 3.78 in
(85 mm x 96 mm)
3.35 x 3.78 in
(85mm x 96mm)
Displacement 68.6 cu in (1.12 liter) 91.3 cu in (1.49 liter) 133 cu in (2.2 liter) 133 cu in (2.2 liter)
Compression Ratio 22:1 22:1 21.5:1 18.8:1
Overall Dimensions
Length 21.1" (537mm) 22.5" (571.5mm) 29.4" (747mm) 25.7" (654mm)
Width 17.2" (475mm) 17.2" (475mm) 19.8" (503mm) 19.2" (488mm)
Height 20.8" (553mm) 24" (609mm) 23.7" (602mm) 23.7" (602mm)
Dry Weight 271 lbs (123 kg) 291 lbs (132 kg) 389 lbs (176 kg) 299 lbs (135.5 kg)
 
Industrial Rating
Intermittent 25.4 HP @ 3000 RPM 33.3 HP @ 3000 RPM 54 HP @ 3000 RPM Rated Output:
52.4 HP @ 3000 RPM
Continuous 22.4 HP @ 3000 RPM 29.3 HP @ 3000 RPM 47.7 HP @ 3000 RPM
Maximum Torque 51.9 lb-ft @ 1800 RPM 70.3 lb-ft @ 1800 RPM 106 lb-ft @ 1800 RPM 105 lb-ft @ 2250 RPM

Performace Curve
Isuzu 3LB1 Isuzu 3LD1
A - 51.9 LB-FT INTERMITTENT
B - 45.7 LB-FT CONTINUOUS
C - 25.4 BHP INTERMITTENT
D - 22.4 BHP CONTINUOUS
Isuzu diesel 3LB1
Rated within 5% at ambient conditions of:
Temperature: 77° F (25° C)
Pressure: 29.31 "Hg (99kPa) DRY
Fuel Specific Gravity: 0.825
NOTE: Muffler & Air Cleaner not installed
A - 70.3 LB-FT INTERMITTENT
B - 61.9 LB-FT CONTINUOUS
C - 33.3 BHP INTERMITTENT
D - 29.3 BHP CONTINUOUS
Isuzu diesel 3LD1
Rated within 5% at ambient conditions of:
Temperature: 77° F (25° C)
Pressure: 29.31 "Hg (99kPa) DRY
Fuel Specific Gravity: 0.825
NOTE: Muffler & Air Cleaner not installed
Isuzu 4LE1
A - 106 LB-FT INTERMITTENT
B - 94 LB-FT CONTINUOUS
C - 46.4 BHP INTERMITTENT (4LE1PW01)
D - 41.0 BHP CONTINUOUS (4LE1PW01)
E - 54.0 BHP INTERMITTENT (4LE1PW03)
F - 47.7 BHP CONTINUOUS (4LE1PW03)
Isuzu diesel 4LE1
Rated within 5% at ambient conditions of:
Temperature: 77° F (25° C)
Pressure: 29.31 "Hg (99kPa) DRY
Fuel Specific Gravity: 0.825
NOTE: Muffler & Air Cleaner not installed
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