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:K14C and Engine Basic Inspection:K14C.
| Condition | Possible Cause | Action |
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Engine noise – Valve noise
NOTE:
Before checking mechanical noise, check that:
•Specified spark plug is used.
•Specified fuel is used. |
Improper valve lash
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Worn valve stem and guide
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Weak or broken valve spring
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Warped or bent valve
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Faulty valve rocker arm
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Faulty valve lash adjuster
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