• Mechanical Damage to Internal Components such as turbine blades, diffuser blades, or bearings may fail partially or completely. This can cause metal fragments to damage the casing, leading to rapid speed loss and increased noise.
• Contamination by Impurities such as Dust, ash, or other impurities entering the turbocharger housing can collide with moving parts, causing vibrations, noise, and speed reduction.
• Insufficient lubrication or bearing damage may result in high friction, overheating, and rapid deceleration of the turbocharger.
• Foreign objects or debris striking the rotor can cause imbalance, leading to vibration, noise, and reduced rotational speed.

• For constant-pressure turbochargers, lock the blower side shutter as the exhaust gas pressure does not directly affect the turbine.
• For axial-flow turbochargers, lock both blower and turbine sides for effective isolation.
• Install a bypass pipe, specially designed by the manufacturer, to divert exhaust gases away from the damaged turbocharger.
• Ensure air circulation through the turbine to prevent overheating of the impeller:
  • If the auxiliary blower draws air through the turbocharger, this is automatically achieved.
  • If not, drill a hole of the recommended diameter in the blanking plates at the air outlet to allow airflow.
• Stop cooling water only in cases of severe leaks from the exhaust side that pose a risk to engine operation.
• Drain the bearing lubrication chambers to prevent further damage or contamination.
• Follow the manufacturer's guidelines to operate the engine at reduced load and speed to avoid overstraining the system without turbocharging support.

1. Exhaust Gas Temperature:

• Insufficient air supply disrupts the normal air-fuel ratio, causing incomplete combustion and a rise in exhaust gas temperature. To keep the temperature within safe limits, the engine speed must be reduced.

2. Exhaust Gas Emissions:

• Poor combustion due to reduced air intake results in black smoke and increased carbon deposits in the exhaust system and boiler tubes. This leads to air pollution and operational inefficiencies, necessitating speed and load restrictions.

3. Thermal Shock Risks:

• Rapid changes in engine speed during manoeuvring can cause thermal stress on engine components. To minimise this risk, changes in speed must be gradual and controlled, thereby limiting the engine’s operational flexibility.