If the link pipe leaks, it is usually that the sealing ring is broken!
Just tear it down and change it!
The expansion valve can also be removed there!
I hope my answer can help you. If in doubt, please continue to consult. Your satisfaction is my pursuit! Wish you a happy life! ! If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.