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BMW 5시리즈 수리 사례

G30 (2017-현재) · 520d

2026. 9. 5. 작업

난이도 & 준비물

증상

I have read on internet and in Tesla Model S service manual book that we can charge refrigerant by high pressure service port (with gas charging machines or another way) as long as there is vacuum in the system and when system is not working. But high pressure service port is not positioned on the same line at every car. For instance, It has been positioend on the compressor discharge line where refrigerant is gas phase in BMW i3 and It has been positioned on liquid line where refrigerant is liquid phase in every Tesla models. I am wondering, What is the considerations to choose placement of h

처리 내용

HandyHowie is correct, kinda sorta. When you want to understand, really understand automotive mechanics you gotta start with a close look in your wallet. The #1 reason for the Air Conditioning (A/C) compressor to condenser hose discharge port is to save the automotive company money. Look at that port carefully. Notice it's a whole lot larger in internal diameter than the low pressure / suction hose port? That's not a mistake. Generally A/C discharge ports are located on the top of the engine, just aft of the radiator. That's not a mistake either. This location is to enable highly efficient evacuation and refrigerant fill at the automotive assembly plant. Generally a vehicle needs four minutes or so of high vacuum evacuation. Test and fill take under 60 seconds or so. That port is designed for high efficiency hook up and flow. Note that this evacuation and fill process is complete before the vehicle is ever started for the first time. The fact that it is a convenient diagnostic location