Repairing a сoolant leak

Sometimes a puddle of antifreeze formed under the car. The leak was not systemic. Later, the dependence of the flow on high engine speeds was found out. Expansion tank top junction was leaking.

I replaced the sealing ring, but this did not work. It turned out that the inner wall of the groove of the sealing ring was destroyed

A new FEBI 32599 hose was purchased, the quality of the hose is high.

Replacing the hose successfully fixed the leak.

Good luck to all!