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 MANUALSCHEVROLET2009IMPALA V8-5.3LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYCRANKSHAFT MAIN BEARING
2009 Chevrolet Impala V8-5.3L
Crankshaft Main Bearing
2009 Chevrolet Impala V8-5.3LSECTION Crankshaft Main Bearing
CRANKSHAFT MAIN BEARING
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)
MAIN BEARING CAP
Crankshaft Bearing Cap M8 Bolts 25 Nm (18 lb ft)
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)
MAIN BEARING CAP
Crankshaft Bearing Cap M8 Bolts 25 Nm (18 lb ft)
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
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.