Engine noise – Valve noise
Precautions: General safety (00)
Perform troubleshooting referring to the following points when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M16A and Engine Basic Inspection:M16A.
| Condition | Possible Cause | Action |
|---|---|---|
|
Engine noise – Valve noise
NOTE:
Before checking mechanical noise, check that:
•Specified spark plug is used.
•Specified fuel is used. |
Improper valve clearance
|
|
|
Worn valve stem and guide
|
||
|
Weak or broken valve spring
|
||
|
Warped or bent valve
|