I installed the Denso reman but it is making noise that seems to subside around 1800 rpms but otherwise its noisey at any speed below 40 mph. The reman dealer blames it on "high" pressure in the system or contamination even though it was "flushed" out by certified ASE A/C friend. Drier was replaced but not expansion valve which is a likely original. Is it necessary to replace expansion valve and since the drier is new (six days) do I need to replace that again? Any other tips? Labor to install this compressor and flush and recharge cost me $260 total. My friend is going to remove, flush, and recharge the system but I have to remove and reinstall compressor in his garage under his supervision while he is doing other things. It might cost me another $50 or so. Any suggestions to avoid doing this again?

Steve