GM Repair Questions? Ask a Mechanic for Answers ASAP
This PI was superseded to include all 04-09 Inline 4/5/6 engines. Please discard PIP3694B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may complaint of an engine belt noise, rough idle, and/or SES light with DTC P0014 and/or P0017. If a rough idle is experienced, a P0106 may be stored as well.
If the SI diagnosis does not isolate the cause of this concern, perform the steps below:
(2) Screen for Pressurized Oil from Oil Pump
(3) Screen for Retard Pressure to Camshaft Actuator
If any of these screens are missing, replace the camshaft actuator solenoid, change the engine oil and filter, and re-evaluate the concern. If none of the screens are missing, proceed to step 3 below.
If you decide to replace the crankshaft and bearings for this concern, first remove the oil pan to inspect the engine block and determine if it has been damaged by the crankshaft. If engine block damage is present, replace the engine. If no engine block damage is present, completely disassemble the engine and inspect everything that could have been damaged by the thrust bearing debris, such as the cam bearing journals, cam lobes, cam followers, lash adjusters, timing chain and guides, oil pump, etc... The CMP actuator solenoid and sprocket assembly should be replaced due to thrust bearing material that may be trapped inside of either component. Before replacing the damaged/contaminated components and reassembling the engine, thoroughly clean all of the cylinder head and engine block oil galleys with oil galley brushes and soapy water. Also, thoroughly clean all other areas of the engine that would have contacted the old oil and thrust bearing debris, such as the inside of the cam cover, front cover, rear cover, timing chain guides, oil pan, oil galleys in the nose of the exhaust camshaft, etc..