Unusual Engine Noise

Knocking noise usually from internal parts of engine.but this knocking sound is different from normal noise.

Model: Grandeur (XG)

Displacement: 3000cc

Year Model: 2003

Mileage: 128354km

Fuel: Gasoline

T/A : Auto

1) Condition:

1. Engine noise in cold condition or accelerating.

2) Cause:

• Damage Damper pulley.

3) Diagnosis:

1. The tension of Drive belt is normal.
2. The symptom disappears after dismounting the drive belt.
3. Damper pulley  vibrates after re-installing the drive belt.= Pulley is Cracked.

4) Repair Guide:

• Replace the Damper pulley

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