Cylinder cracking edit broadcastThe temperature is low in winter, and the cylinder head of diesel engine is prone to cracks and water leakage. The main reasons are as follows:1. Add cooling water after starting. After the diesel engine is started, the temperature inside the engine rises immediately. If cooling water is added at this time, the cylinder block and cylinder head will cool down rapidly, and cracks will occur due to cold shrinkage.2. After shutting down, there is no cooling water. The water in the engine freezes into ice, the volume increases, and the cylinder block and cylinder head burst.3. When the diesel engine is running, the cooling water is insufficient or the temperature of the water tank is too high, and the cooling water is suddenly added. Cracking can also be caused by overcooling and shrinkage of the cylinder block and cylinder head.4. The diesel engine runs for a long time, the temperature inside the engine is high, and the high-temperature water is released immediately after parking. It will cause high temperature parts to crack when they encounter cold air suddenly.5. Use the decompression machine to stop, so that the high temperature cylinder head suddenly encounters cold air and causes cracking.There are the following methods to prevent cracking of various cylinder blocks and cylinder heads:1. Before starting the diesel engine, warm water should be added to the water tank. In the severe winter season, the hot water should be poured 2~3 times. It is better to start when the water flowing out of the drain valve is about 30~50℃.2. When the diesel engine has been running for a long time, wait for about half an hour after stopping, and then release the cooling water when the engine temperature drops to 40~50°C. After draining the water, it is best to poke through the drain valve switch with a thin iron wire to prevent sediment from clogging the drain valve.3. When the diesel engine is overheated and seriously lacks water, let the diesel engine idle at low speed for 10-15 minutes, and then slowly add cooling water