1A
Engine noise – Piston, ring and cylinder noise
Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M13A with VVT and Engine Basic Inspection:M13A with VVT .
Condition Possible Cause Action
Engine noise – Piston, ring and cylinder noise
NOTE:
Before checking mechanical noise, make sure that: Specified spark plug is used. Specified fuel is used.
Worn piston, ring cylinder bore
Cylinders, Pistons and Piston Rings Inspection:M13A