ROULANT brand valve stem seal, made in Taiwan

It is a delicate and important part at the top of the engine that seals the valve stem.
By preventing oil from leaking into the combustion chamber, it keeps the engine clean and efficient.
Its failure causes increased oil consumption and blue smoke from the exhaust.
The health of this seal plays a significant role in the life of the valves and maintaining engine efficiency.

Technical note:
Before installing the valve stem seal, the valve interface edge and oil guide channel must be completely clean and free of burrs; the presence of even a small amount of dirt or roughness will cause minor oil leakage and reduce the life of the seal cup in a short time.

Identifying the location of an oil leak:
Symptoms:
Blue smoke during cold start or after releasing the gas
Reduced engine oil level without apparent leakage
Oil soot on the spark plugs and reduced combustion efficiency