How to judge the abnormality of the engine through the change of oil?

When the sprinkler engine is abnormal, the following changes occur in the oil:

1. There are two main reasons for excess oil consumption. One is that the clearance between the piston and the cylinder wall is too large or has serious damage. The piston ring wears, and the cylinder wall wears or pulls the cylinder. Second, the oil seal is damaged, causing the oil to leak from the valve to the cylinder and participate in combustion. At the time of inspection, the engine cylinder pressure gauge can be used to detect the cylinder pressure of the engine, and the exhaust gas detector can be used to measure the exhaust gas of the vehicle.

2. The amount of oil has increased without notice. When checking the oil stock, it is found that the oil is significantly increased, which may be the result of leakage of coolant or fuel into the crankcase. At this time, by measuring the cylinder pressure, etc., check whether the cylinder pad is damaged, whether the cylinder wall or the cylinder sleeve has any trachoma, whether the cylinder head or the cylinder block is damaged, these faults will cause the coolant to infiltrate the crankcase, so that the oil level rises. . If this happens, the contaminated lubricating oil will not only lose its lubricating effect, but it will also corrode the internal parts of the engine and cause the engine to be overhauled in advance.

3. The oil quickly turns black. After the sprinkler is used for a period of time, the changed oil will gradually turn black. This is normal. However, when the synthetic oil was replaced, the oil quickly turned black, indicating that there was a lot of sludge in the crankcase. At this time, because the synthetic oil has a highly effective quiet additive, it can quickly clean the oil sludge and other debris deposited in the crankcase and float on the surface of the oil, so the oil will quickly turn black.

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