Causes of oil leakage of crankshaft oil seal

Crankshaft is an important part of automobile engine. Its function is to convert the gas force from piston and connecting rod into torque, and the linear motion of piston into rotary motion, a valve train and other auxiliary devices for driving a vehicle’s transmission system and an engine. Basically, it’s a power-output unit in a car

Causes of oil leakage of crankshaft oil seal

1. Crankshaft oil seals do not use non-oil-based lubricants in the process of pressing and mounting, which causes the oil seals to loosen or even fall off after a period of use (for example, some engine manufacturers use oil to replace the relatively expensive non-oil-based lubricants in order to reduce the manufacturing cost) .

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2. The parallelism of the pressure mounting surface of the rear oil seal to the mounting surface of the rear oil seal does not meet the technical requirements of the assembly drawing, resulting in uneven force and deformation of the lip of the rear oil seal, after using the engine for a period of time, the lip of the oil seal will deform and even the whole seal will distort, causing oil seal damage and oil leakage.

3, the engine service life is long, after the oil seal natural aging lip place produces the crack to cause the engine oil leakage.

Solutions of oil leakage of crankshaft oil seal:

First of all, if in the road, found the car crankshaft after the oil seal leakage is very serious, immediately to the crankcase to inject some automotive oil, and then quickly drive the car to the nearest service station. In the car after the maintenance site, if there are replacement parts of the car, it is necessary to replace the oil seal after the car crankshaft. But if there are no spare parts for the car, the last crankshaft main bearing cover can be removed and the graphite asbestos strips carefully removed from the crankshaft main bearing cover, use a butter-coated asbestos thread pad in the oil seal groove, and then take off the graphite asbestos strips in accordance with the original shape of pressure on the asbestos thread, after the completion of temporary use for a short period of time.

Common oil seal: valve oil seal, camshaft oil seal, crankshaft before and after the oil seal, before and after the wheel oil seal, differential oil seal, half-shaft oil seal, transmission oil seal and so on.

The oil seal is one kind of seal ring, is uses in the revolving, the sliding machine work union environment, its characteristic has:

1. Prevent silt, dust, moisture and so on from outside to invade in the bearing;
2. Prevent the leakage of lubricating oil from bearings.