Reasons For Cylinder Cracking

In winter, when the temperature is low, diesel engine cylinder heads are prone to cracking and water leakage. The main reasons for this are as follows:
1. Add cooling water only after starting. After starting the diesel engine, the temperature inside the engine immediately rises. If cooling water is added at this time, the cylinder block and cylinder head will rapidly cool, causing cracks due to cold shrinkage.
2. After shutdown, no cooling water was discharged. The water inside the aircraft freezes into ice, causing an increase in volume and resulting in expansion and cracking of the cylinder body and cylinder head.
3. When the diesel engine is running, if the cooling water is insufficient or the engine temperature is too high when the water tank is turned on, suddenly add cooling water. Undercooling shrinkage of the cylinder block and cylinder head can also cause cracking.
4. The diesel engine runs for a long time and the temperature inside the engine is high. After stopping, immediately drain the high-temperature water. It can cause high-temperature parts to suddenly crack when exposed to cold air.
5. Using a pressure reducer to stop the engine caused the high-temperature cylinder head to suddenly encounter cold air and crack.