Five reasons for oil ingress
Lighter water in the excavator will cause deformation of the engine's crankshaft, connecting rods and other important parts, causing engine jitter, and heavy parts will cause the parts to break and the engine to be scrapped. So what causes the engine to enter the water?
1. Engine water plugging
Water is blocked due to scale corrosion, and cooling water will enter the oil channel from the water channel to the oil pan. This cause is very common, so check for water plugs frequently.
2.Oil radiator is damaged
The radiator pipe is damaged, and the water outside the radiator will penetrate into the oil radiator, causing oil to enter the water.
3.Cylinder liner cracks
When the cooling water is in contact with the working cylinder liner, cracks are easy to occur. Once the cracks occur, the cooling water will directly enter the cylinder and enter the oil pan through the cylinder wall. This will cause the oil to become white and the engine oil to become white. It can cause problems such as poor combustion of the engine and white smoke. Under normal circumstances, the cylinder liner is not prone to cracks, but there are some situations, such as freezing in the absence of antifreeze in the cooling water in winter, which may crack the cylinder liner.
4.Cylinder liner seal is broken
Cylinder liner seal damage is a common cause of oil water ingress, so when troubleshooting, be sure to check whether the cylinder liner seal is intact.
5.Cylinder gasket damaged
If the cylinder pad is damaged and the water is circulated at a high speed, the water in the water channel will flow into the oil channel, causing oil to enter the water. Cylinder gasket damage is also one of the common reasons for oil water. After disassembling the machine, use a new cylinder gasket as much as possible to avoid water leakage from the cylinder gasket that may cause engine oil damage.
Four methods of judging oil water
1. Observe the appearance of the oil of the excavator. You can easily determine whether the oil contains water by the color. Water-free motor oils are translucent, oily, and water-containing motor oils are opaque brown or khaki.
2. Check whether the coolant of the excavator contains oil. If some parts of the engine are damaged, the engine coolant will enter the lubrication system and the oil will be blended together. The infiltrated oil will also be found in the water tank coolant and can be easily identified.
3. If the engine oil enters water, it will react with the coolant under high temperature environment to form an emulsion. Examination of the dipstick reveals that it is white with foam.
4. When the oil of the excavator contains a large amount of water, the oil level of the oil will rise. At this time, we can simply judge by the level of the oil dipstick level.
Summary: We can judge whether the oil has entered the water by looking at the appearance color of the oil, the height of the oil surface, and the observation of the oil coolant. When encountering water in the engine, do not start the engine a second time. You need a professional maintenance worker to clean up the water inside the engine. Check to determine the cause of water ingress.
