| Incorrect oil filter without anti-drainback feature |
Install the correct oil filter. |
| Incorrect oil viscosity |
- Drain the oil.
- Install the correct viscosity oil.
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| High valve lash adjuster leak down rate |
Replace the lash adjusters as required. |
| Worn crankshaft thrust bearing |
- Inspect the thrust bearing and crankshaft.
- Repair or replace as required.
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| Damaged or faulty oil filter by-pass valve |
- Inspect the oil filter by-pass valve for proper operation.
- Repair or replace as required.
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| Malfunctioning camshaft position actuators - improper oil viscosity or contamination. The result is camshaft actuator locking pin does not lock |
- Verify correct engine oil viscosity by changing the engine oil and filter. Reevaluate the concern.
- Isolate the noise to a specific camshaft position actuator.
- Replace the camshaft actuator, oil and filter.
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