Is Replacing Valve Stem Seals Considered a Major Overhaul?

[GabrielleMarie]

Replacing valve stem seals is not considered a major overhaul. However, if the engine cylinder head is disassembled to replace the valve stem seals, then it would be classified as a major overhaul. It is recommended that car owners use non-disassembly cylinder replacement technology to replace valve stem seals. Under any circumstances, try to avoid opening the engine cylinder head. The valve stem seals are located on the valves and are made of rubber material. After prolonged use, this component may experience reduced elasticity. Valve stem seals are typically composed of an outer frame and fluororubber vulcanized together, with a self-tightening spring or steel wire installed at the radial opening. They are used to seal the engine valve guide rods and are a type of oil seal. They prevent engine oil from entering the intake and exhaust pipes, which could lead to oil loss. Additionally, they prevent the leakage of the gasoline-air mixture and exhaust gases, as well as prevent engine oil from entering the combustion chamber.