What can happen if a Diesel engine is shut down immediately after operation?

Shutting down a diesel engine immediately after operation can lead to turbo seizure due to the rapid stop of the turbine without allowing it to cool down properly. Diesel engines often depend on turbochargers to enhance performance and efficiency, and during operation, they generate significant amounts of heat. When the engine is abruptly turned off, the turbocharger continues to spin due to inertia, but without the oil supply to lubricate and cool it, temperatures can rise quickly.

Over time, this excessive heat can cause the oil left in the turbo to break down and form deposits, which can lead to the bearings seizing up. Preventing this issue is common practice; many operators allow the engine to idle for a few minutes before shutdown to allow the turbo to cool and reduce the risk of damage.

In contrast, other options such as excessive fuel consumption, coolant loss, or oil leakage do not directly result from the immediate shutdown of the engine.