The following parts of the diesel engine are not suitable for buttering: The cylinder head and cylinder head gaskets should not be coated with butter to enhance the tightness. Analysis of Cause: After the cylinder head nut is tightened, some of the butter will be wasted outside the cylinder and some of the butter will be squeezed into the cylinder. When the diesel engine is working, this part of the butter will be burned into charcoal at a high temperature, accumulating at the top of the cylinder piston, etc. After the diesel engine temperature rises, a layer of oil film between the cylinder head and the cylinder head gasket, the cylinder head and the cylinder block surface will melt and disappear due to the increase of temperature, so that the cylinder head nut will loosen, causing leakage, oil leakage, and direct Damage to the cylinder head gasket may also be due to the high temperature and the coking of the butter, making the cylinder head and cylinder head gasket difficult to disassemble. Diesel engine dry-type cylinder liners can cause the diesel engine to overheat and affect normal operation. Analysis of reason: When the engine is heated up to normal temperature, the cylinder liner will be thermally expanded, and the cylinder block seat hole will be less in expansion due to the lower temperature due to cooling water. The outer surface of the dry cylinder liner fits snugly over the seat hole to conduct heat. The buttering of the cylinder liner prevents good contact between the two surfaces and does not allow proper heat dissipation. Through the above explanations, we know that butter is widely used in diesel engines and can protect the body, but it cannot be misused, otherwise it will cause adverse consequences, and it will even have a counter effect and damage the body.
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