Q: I am wanting to refill the freon on my volvo but is I dont know where to do so on 1990 Volvo 240

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Have been looking in various places on the web and in a book but have not been able to find the answer. I am needing to know exactly where it is that the freon needs to be put into.
(1) Answer
It's normally on the back of the compressor on this car. I suggest you check out the system before refilling it though, these have a lot of issues with the expansion valves. I also suggest a change over to R134a if it hasn't been done already.
Good Luck