If you cannot rotate at high speed, there will not only be pressure but also high temperature. It will spray your face as soon as you open it. It's not the most important thing, and it could burn you. 100-110 degrees so you will be miserable. If these two problems do not occur, the diesel engine will spray engine oil in a short time, causing the oil level to drop and the engine to run out of oil. and hold the shaft.
In any case, it is recommended not to open the oil dipstick while the engine is running
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