Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2012SONIC L4-1.4L TURBOREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECRANKSHAFT MAIN BEARING
2012 Chevrolet Sonic L4-1.4L Turbo
Crankshaft Main Bearing
2012 Chevrolet Sonic L4-1.4L TurboSECTION Crankshaft Main Bearing
Crankshaft Bearing Tie Plate Bolts (M6)
First Pass 10 Nm (89 lb in)
Second Pass Additional 60°
Third Pass Additional 15°
Crankshaft Bearing Tie Plate Bolts (M8)
First Pass 25 Nm (18 lb ft)
Second Pass Additional 60°
Third Pass Additional 15°
Crankshaft Bearing Journal Standard Diameter (brown or green)
50.004 mm-50.017 mm (1.9687 in-1.9692 in)
Crankshaft Bearing Journal Undersize 0.25 Diameter (brown/blue or green/blue)
49.754 mm-49.767 mm (1.9588 in-1.9593 in)
Crankshaft Bearing Journal Undersize 0.5 Diameter (brown/white or green/white)
49.504 mm-49.517 mm (1.949 in-1.9495 in)
Crankshaft Bearing Journal Width Standard
23.000 mm-23.052 mm (0.9055 in-0.9076 in)
Crankshaft Bearing Journal Width Undersize 0.25
23.200 mm-23.252 mm (0.9134 in-0.9154 in)
Crankshaft Bearing Journal Width Undersize 0.4
23.400 mm-23.452 mm (0.9213 in-0.9233 in)
Crankshaft Bearing Mark 328N (brown) Thickness
1.989 mm-1.995 mm (0.0783 in-0.0785 in)
Crankshaft Bearing Mark 329N (green) Thickness
1.995 mm-2.001 mm (0.0785 in-0.0788 in)
Crankshaft Bearing Mark 330N Thickness Undersize 0.25 (brown/blue)
2.114 mm-2.120 mm (0.0832 in-0.0835 in)
Crankshaft Bearing Mark 331 Thickness Undersize 0.25 (green/blue)
2.120 mm-2.126 mm (0.0835 in-0.0837 in)
Crankshaft Bearing Mark 332 Thickness Undersize 0.5 (brown/white)
2.239 mm-2.245 mm (0.0881 in-0.0884 in)
Crankshaft Bearing Mark 332 Thickness Undersize 0.5 (green/white)
2.245 mm-2.251 mm (0.0884 in-0.0886 in)
Crankshaft Bearing Clearance
0.007 mm-0.031 mm (0.0003 in-0.0012 in)
Crankshaft Bearing Clearance Axial
0.100 mm-0.202 mm (0.0039 in-0.008 in)
Crankshaft Bearing Out Of Round
0.03 mm (0.0012 in)
Connecting Rod Bearing Journal Diameter Standard
42.971 mm-42.987 mm (1.6918 in-1.6924 in)
Connecting Rod Bearing Journal Diameter Undersize 0.25 (blue)
42.721 mm-42.737 mm (1.6819-in-1.6826 in)
Connecting Rod Bearing Journal Diameter Undersize 0.5 (white)
42.471 mm-42.487 mm (1.6721 in-1.6727 in)
Connecting Rod Bearing Thickness Standard
1.490 mm-1.500 mm (0.0587 in-0.0591 in)
Connecting Rod Bearing Thickness Undersize 0.25
1.615 mm-1.625 mm (0.0636 in-0.064 in)
Connecting Rod Bearing Thickness Undersize 0.5
1.740 mm-1.750 mm (0.0685 in-0.0689 in)
Connecting Rod Bearing Diameter Standard (upper and lower)
1.490 mm-1.500 mm (0.0587 in-0.0591 in)
Connecting Rod Bearing Diameter Undersize 0.25 (upper and lower)
1.615 mm-1.625 mm (0.0636 in-0.064 in)
Connecting Rod Bearing Diameter Undersize 0.5 (upper and lower)
1.740 mm-1.750 mm (0.0685 in-0.0689 in)
Connecting Rod Bearing Clearance
0.013 mm-0.061 mm (0.0005 in-0.0024 in)
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.