What Causes Gasoline Leakage from the Exhaust Pipe?

[VonJude]

Gasoline leakage from the car's exhaust pipe is caused by a damaged valve oil seal. Introduction to Valve Oil Seal: The valve oil seal is a type of oil seal, typically made by vulcanizing an outer frame and fluorine rubber together. The seal's opening is equipped with a self-tightening spring or steel wire, used for sealing the engine's valve guide rod. Function of Valve Oil Seal: The valve oil seal prevents engine oil from entering the intake and exhaust pipes, avoiding oil loss. It also prevents the leakage of the mixture of gasoline and air as well as exhaust gases, and stops engine oil from entering the combustion chamber. The valve oil seal is one of the critical components of the engine's valve assembly. It comes into contact with gasoline and engine oil under high temperatures, so it requires materials with excellent heat and oil resistance, usually made from fluorine rubber.