G8 V8-6.0L (2009)
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Malfunctioning oil pump pressure relief valve
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Excessive bearing clearance
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Cracked, porous, or restricted oil galleries
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Oil gallery plugs missing or incorrectly installed
Refer to Engine Block Plug Installation (See: Service and Repair/Overhaul).
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Improper operation of the active fuel management oil pressure relief valve
Refer to Cylinder Deactivation (Active Fuel Management) Oil Pressure Relief Valve Diagnosis and Testing (See: Testing and
Inspection/Component Tests and General Diagnostics).
