How to Determine the Valve Oil Seal is Broken?

The role of valve oil seal is to prevent the oil from entering the intake and exhaust pipe, to avoid the loss of oil, to prevent the gasoline and air mixture and exhaust gas leakage, to prevent the engine oil into the combustion chamber. Valve oil seal is one of the important parts of the engine valve set, once the valve oil seal is bad engine failure symptoms, the following we will learn about the symptoms of bad valve oil seal.

Valve oil seal aging or bad symptoms

1、The engine burns oil, blue smoke.

2、The spark plug carbon accumulation is serious, the engine power decline.

3、The seal decreases leading to cylinder pressure is not enough, the engine power decline.

4、Oil consumption accelerated, and in serious cases directly lead to engine explosion due to lubrication and cooling failure.

Oil seal aging causes of oil leakage

1、Assembly reasons; in the assembly, there is no alignment of threads or splines, the misaligned teeth will seep oil because of poor sealing, and also damage the oil seal itself.

2、Material problem: The tightness of the spring does not meet the process requirements, and when it is too tight, it will lead to improper fit of the oil seal with rotating shaft and abnormal wear. When it is too loose, it will lead to too little pressure and can't be pressed, so it can't achieve the sealing effect.

3、The oil seal and the rotating shaft are not the same axis, and the phenomenon of bias grinding occurs, resulting in abnormal wear of the lip.

4、Without the lip grease of the oil seal, dry friction will occur, and mechanical wear will soon wear the teeth flat.

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