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 MANUALSCHEVROLET2012COLORADO 4WD V8-5.3LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECRANKSHAFT MAIN BEARING
2012 Chevrolet Colorado 4WD V8-5.3L
Crankshaft Main Bearing
2012 Chevrolet Colorado 4WD V8-5.3LSECTION Crankshaft Main Bearing
M8 main bearing cap side bolts (1-10)
Tighten the M8 bolts (1-5)
first pass in sequence to 20 Nm (15 lb ft)
final pass in sequence to 30 Nm (22 lb ft)
Tighten the M8 bolts (6-10)
first pass in sequence to 20 Nm (15 lb ft)
final pass in sequence to 30 Nm (22 lb ft)
M10 bearing cap bolts
Crankshaft Bearing Cap M10 Bolts
First Pass in Sequence 20 Nm (15 lb ft)
Final Pass in Sequence 80 degrees
Crankshaft Bearing Cap M10 Studs
First Pass in Sequence 20 Nm (15 lb ft)
Final Pass in Sequence 51 degrees
Crankshaft Main Bearing Clearance
Production 0.02-0.052 mm (0.0008-0.0021 in)
Service 0.02-0.065 mm (0.0008-0.0025 in)
Crankshaft Main Bearing Bore Diameter 69.871-69.889 mm (2.75-2.751 in)
Crankshaft Main Bearing Bore Out-of-Round 0.006 mm (0.0002 in)
Tighten the M8 bolts (1-5)
first pass in sequence to 20 Nm (15 lb ft)
final pass in sequence to 30 Nm (22 lb ft)
Tighten the M8 bolts (6-10)
first pass in sequence to 20 Nm (15 lb ft)
final pass in sequence to 30 Nm (22 lb ft)
M10 bearing cap bolts
Crankshaft Bearing Cap M10 Bolts
First Pass in Sequence 20 Nm (15 lb ft)
Final Pass in Sequence 80 degrees
Crankshaft Bearing Cap M10 Studs
First Pass in Sequence 20 Nm (15 lb ft)
Final Pass in Sequence 51 degrees
Crankshaft Main Bearing Clearance
Production 0.02-0.052 mm (0.0008-0.0021 in)
Service 0.02-0.065 mm (0.0008-0.0025 in)
Crankshaft Main Bearing Bore Diameter 69.871-69.889 mm (2.75-2.751 in)
Crankshaft Main Bearing Bore Out-of-Round 0.006 mm (0.0002 in)
RENDER: 1.0x
NO RELATED
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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.