Cause
|
Correction
|
Incorrect oil filter without anti-drainback feature
|
Install the correct oil filter.
|
Incorrect oil viscosity
|
|
2. |
Install the correct viscosity oil. |
|
High valve lash adjuster leak down rate
|
Replace the lash adjusters as required.
|
Worn crankshaft thrust bearing
|
|
1. |
Inspect the thrust bearing and crankshaft. |
|
2. |
Repair or replace as required. |
|
Damaged or faulty oil filter by-pass valve
|
|
1. |
Inspect the oil filter by-pass valve for proper
operation. |
|
2. |
Repair or replace as required. |
|
Malfunctioning camshaft position actuators - improper oil
viscosity or contamination. The result is camshaft actuator locking
pin does not lock
|
|
1. |
Verify correct engine oil viscosity by changing
the engine oil and filter. Reevaluate the concern. |
|
2. |
Isolate the noise to a specific camshaft position
actuator. |
|
3. |
Replace the camshaft actuator, oil and
filter. |
|
