What's the reason for a diesel engine not being able to restart after stalling?

[Trevor]

Main reason is that the engine temperature is too low. As long as the engine is kept warm and the biting cold wind is prevented from blowing directly into the engine compartment, the failure to start can be avoided. Specific information is as follows: 1. Parking precautions: When parking in winter, pay attention to the direction of the front of the car. It is best to point the front of the car towards a building, using the building to block the wind and prevent the engine from becoming too cold due to the cold wind. When parking at night, you can point the front of the car towards the direction of the rising sun, so that the first rays of sunlight in the morning can shine on the front of the car, helping the engine to warm up. This makes starting the car much easier. 2. Extended information: If the engine stalls when shifting gears, it may be due to the idle speed being too low at the time, or the idle cut-off valve not being tightened properly, or it could be caused by shifting into too high a gear, or the oil-gas separator being severely clogged.