Cause
| Correction
|
Low oil pressure
|
| • | Repair or replace damaged components as required. |
|
Improper lubrication of the valve train components
|
| • | Inspect the valve rocker arms. |
| • | Inspect the valve push rods. |
| • | Inspect the valve lifters. |
| • | Inspect the oil filter bypass valve. |
| • | Inspect the oil pump and pump screen. |
| • | Inspect the engine block oil galleries. |
| • | Repair or replace damaged components as required. |
|
Worn, damaged or improperly installed valve rocker arm
|
| • | Inspect the valve rocker arms. |
| • | Repair or replace damaged components as required. |
|
Worn or damaged valve rotator
|
| • | Inspect the valve rotators. |
| • | Repair or replace damaged components as required. |
|
Broken valve spring
|
| • | Inspect the valve springs. |
| • | Repair or replace damaged components as required. |
|
Worn, damaged or stuck valves (carbon on the valve stem or valve seat)
|
| • | Repair or replace damaged components as required. |
|
Worn or damaged valve guide
|
| • | Repair or replace damaged components as required. |
|
Worn, damaged or bent valve push rod
|
| • | Inspect the valve rocker arms. |
| • | Inspect the valve push rods. |
| • | Inspect the valve lifters. |
| • | Repair or replace damaged components as required. |
|
Worn, damaged or dirty valve lifter
|
| • | Inspect the valve lifters. |
| • | Repair or replace damaged components as required. |
|
Worn or damaged camshaft lobes
|
| • | Inspect the engine camshaft lobes. |
| • | Repair or replace damaged components as required. |
|
Worn, damaged, improperly installed or loose timing chain and sprockets
|
| • | Inspect the timing chain and sprockets. |
| • | Repair or replace damaged components as required. |
|
Worn, damaged or improperly installed timing chain tensioner (if equipped)
|
| • | Inspect the timing chain tensioner. |
| • | Repair or replace damaged components as required. |
|
