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Home >> Chevrolet >> 2012 >> Sonic L4-1.8L >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> Crankshaft Main Bearing
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Crankshaft Main Bearing





Crankshaft Bearing Cap Bolts
First Pass 50 Nm (37 lb ft)
Second Pass 45°
Third Pass 15°


Crankshaft Main Bearing Journal 1-5 Diameter Standard Size (brown/green)
54.980-54.997 mm (2.165-2.166 in)

Crankshaft Main Bearing Journal 1-5 Diameter Undersize 0.25 (brown/green)
54.730-54.747 mm (2.155-2.156 in)

Crankshaft Main Bearing Journal 1-5 Diameter Undersize 0.50 (brown/green)
54.482-54.495 mm (2.145-2.146 in)

Crankshaft Main Bearing Journal 3 Width Standard Size
26.000-26.052 mm (1.024-1.026 in)

Crankshaft Main Bearing Journal 3 Width Undersize 0.25
26.200-26.252 mm (1.032-1.034 in)

Crankshaft Main Bearing Journal 3 Width Undersize 0.50
26.400-26.452 mm (1.040-1.042 in)

Con-Rod Bearing Journal Standard Size
42.971-42.987 mm (1.692-1.693 in)

Con-Rod Bearing Journal Undersize 0.25 (blue)
42.721-42.737 mm (1.682-1.683 in)

Con-Rod Bearing Journal Undersize 0.50 (white)
42.471-42.487 mm (1.672-1.673 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Standard Size (brown)
1.987-1.993 mm (0.0783-0.0785 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Standard Size (green)
1.993-1.999 mm (0.0785-0.0787 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Undersize 0.25 (brown/blue)
2.112-2.118 mm (0.0832-0.0834 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Undersize 0.25 (green/blue)
2.118-2.124 mm (0.0834-0.0836 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Undersize 0.50 (brown/blue)
2.237-2.243 mm (0.0842-0.0844 in)

Crankshaft Main Bearing 1-5 Bearing Shell Thickness Undersize 0.50 (green/blue)
2.243-2.249mm (0.0884-0.0886 in)

Crankshaft Bearing Allowable Clearance
0.005-0.059 mm (0.0002-0.0024 in)

Crankshaft Bearing Allowable End Clearance
0.100-0.202 mm (0.004-0.008 in)

Crankshaft Main Bearing 3 Width Standard Size
25.85-25.90 mm (1.018-1.020 in)

Crankshaft Main Bearing 3 Width Undersize 0.25
26.05-26.10 mm (1.026-1.028 in)

Crankshaft Main Bearing 3 Width Undersize 0.50
26.25-26.30 mm (1.034-1.036 in)

Con-Rod Bearing Shell Thickness Standard Size
1.485-1.497 mm (0.0585-0.0590 in)

Con-Rod Bearing Shell Thickness Undersize 0.25
1.610-1.622 mm (0.0634-0.0639 in)

Con-Rod Bearing Shell Thickness Undersize 0.50
1.735-1.747 mm (0.0684-0.0688 in)

Con-Rod Bearing Allowable Clearance
0.019-0.071 mm (0.0007-0.0028 in)