Isuzu 4LB1, 4LC1, 4LE1 Manuals, Engine Specifications & Bolt Torques

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4LB1 Engine

Main Bearing Cap Bolts
Step 1 = 20 Nm, 15 lb.ft
Step 2 = 50 Nm, 35 lb.ft
Step 3 = 90 Nm, 66 lb.ft

Con Rod Bolts
41 Nm, 30 lb.ft

Cylinder Head Bolts (M12)
Step 1 = 90 Nm, 66 lb.ft
Step 2 = + 60 to 90 degrees

Cylinder Head Bolts (M8)
25-34 Nm, 18-25 lb.ft

4LC1 Engine

Main Bearing Cap Bolts
Step 1 = 20 Nm, 15 lb.ft
Step 2 = 50 Nm, 35 lb.ft
Step 3 = 90 Nm, 66 lb.ft

Con Rod Bolts
step 1 = 27 Nm, 20 lb.ft
step 2 = + 100-115 degrees

Cylinder Head Bolts (M12)
Step 1 = 90 Nm, 66 lb.ft
Step 2 = + 60 to 90 degrees

Cylinder Head Bolts (M8)
25-34 Nm, 18-25 lb.ft

4LE1 Engine

Main Bearing Cap Bolts
Step 1 = 20 Nm, 15 lb.ft
Step 2 = 50 Nm, 35 lb.ft
Step 3 = 90 Nm, 66 lb.ft

Con Rod Bolts
82 Nm, 60 lb.ft

Cylinder Head Bolts (M12)
Step 1 = 90 Nm, 66 lb.ft
Step 2 = + 60 to 90 degrees

Cylinder Head Bolts (M8)
25-34 Nm, 18-25 lb.ft

4LB1 Engine

Type
4 cylinder in-line
Water cooled
OHV

Bore, Stroke
77.4 × 79.7 mm

Displacement
1499 ml

Compression Ratio
22:1

Power Naturally Aspirated
24 kW, 33 hp @3000 rpm

Power Turbo charged
27 kW, 37 hp @2800 rpm

Dimensions Approx
a Length = 550 mm
Width = 440-450 mm
Height = 580-590 mm

Weight approx
130-140 kg

4LC1 Engine

Type
4 cylinder in-line
Water cooled
OHV

Bore, Stroke
77.4 × 92 mm

Displacement
1731 ml

Compression Ratio
22:1

Power Naturally Aspirated
30 kW, 41 hp @3000 rpm

Dimensions approx
Length = 550 mm
Width = 440 mm
Height = 600 mm

Weight approx
145 kg

4LE1 Engine

Type
4 cylinder in-line
Water cooled
OHV

Bore, Stroke
85 × 92 mm

Displacement
2179 ml

Compression Ratio
21.5:1

Power Naturally Aspirated
40 kW, 54 hp @3000 rpm

Dimensions approx
Length = 690 mm
Width = 450 mm
Height = 610 mm

Weight approx
155 kg