What are the symptoms of a damaged valve oil seal?

[SanAngelina]

The symptoms of a damaged valve oil seal are as follows: 1. The engine burns oil and emits blue smoke. 2. Severe carbon buildup on the spark plugs, leading to reduced engine power. 3. Decreased sealing performance results in insufficient cylinder pressure, causing reduced engine power. 4. Accelerated oil consumption, and in severe cases, it can directly lead to engine seizure due to lubrication and cooling failure. The causes of valve oil seal damage are as follows: 1. Improper alignment of threads or splines during assembly, where misaligned edges can cause oil leakage due to poor sealing. 2. The tightness of the spring does not meet the technical requirements. If too tight, it can cause improper fit between the oil seal and the rotating shaft, leading to abnormal wear; if too loose, the insufficient pressure cannot compress the seal properly, failing to achieve the sealing effect.