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Cause
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Correction
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Low oil pressure
|
|
2.
|
Repair or replace as required.
|
|
Loose and/or worn follower, valve rocker arm
|
|
1.
|
Inspect the follower, valve rocker arm.
|
|
2.
|
Repair or replace as required.
|
|
Improper lubrication to the followers, valve rocker arms
|
Inspect the following components and repair or replace as required:
|
•
|
The follower, valve rocker arm
|
|
•
|
The oil filter bypass valve
|
|
•
|
The oil pump and pump screen
|
|
•
|
The cylinder head oil galleries
|
|
•
|
The engine block oil galleries
|
|
Broken valve spring
|
Replace the valve spring.
|
Worn or dirty stationary hydraulic lash adjusters (SHLAs), valve lifters
|
Replace the SHLAs, valve lifters.
|
Stretched or broken timing chain or chains and/or damaged sprocket teeth
|
Replace the timing chain or chains and sprockets.
|
Worn timing chain tensioner or tensioners
|
Replace the timing chain tensioner or tensioners as required.
|
Worn timing chain shoe or shoes
|
Replace the timing chain shoe or shoes as required.
|
Worn timing chain guide or guides
|
Replace the timing chain guide or guides as required.
|
Worn camshaft lobes
|
|
1.
|
Inspect the engine camshaft lobes.
|
|
2.
|
Replace the camshaft or camshafts and SHLAs, valve lifters, as required.
|
|
Worn valve guides or valve stems
|
Inspect the following components and repair as required:
|
|
•
|
Carbon on the valve stem or valve seat may cause the valve to stay open
|
|
Inspect the following components and repair as required:
|
