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Technical Article
Turbocharger Surging: Causes, Symptoms and Corrective Actions
Turbocharger surging is unstable airflow through the compressor, often heard as pulsing or banging with fluctuating boost pressure. It can be caused by fouled compressor or turbine components, restricted air coolers, exhaust restrictions, engine overload, uneven cylinder output, or abnormal scavenge conditions.
Symptom, possible cause and inspection
| Symptom | Possible cause | Inspection |
|---|---|---|
| Pulsing noise and boost fluctuation | Compressor surge due to airflow instability | Check load, compressor condition, air cooler, and exhaust path |
| Surge at certain load range | Matching issue, fouling, or cylinder imbalance | Compare cylinder output and turbocharger trend |
| High scavenge temperature | Air cooler fouling or cooling issue | Inspect air cooler and cooling water side |
Measurements and acceptance limits
Condition assessment should be based on recorded measurements, visual findings, operating symptoms, and the applicable maker documentation. Acceptable limits should be confirmed against the applicable manufacturer's manual and engine-specific technical documentation.
Need technical assistance?
If inspection, overhaul, troubleshooting, workshop repair, or onboard attendance is required, Dieselmech Group can review the symptoms, engine details, operating history, and available measurements before recommending the next practical step. Contact us at +65 6334 1855, email sales@dieselmech.com.sg, or submit an enquiry through the Contact Us page.
Technical note
This article is for general technical information. Actual procedures, limits, clearances, pressures, temperatures, torque values, and renewal criteria depend on the engine model, configuration, maker revision, service bulletin, vessel procedures, and class requirements. Manufacturer manuals and vessel safety procedures take precedence. Safety-critical work should be carried out by appropriately qualified personnel.
Published by Dieselmech Group Technical Team. For advice on a specific engine or fault, contact our marine engineers.
