I was told by my long-time mechanic that our supercharger was going out. There is a noise when the engine is idling. Decided to take it to a Buick dealership and was told it isn’t the supercharger it is the a/c compressor. When we said the compressor had been replaced 9 months ago, they said they would check it again. They kept it over the weekend and checked everything. When they detach the a/c belt the noise goes away. When they re-attach and run the a/c the noise comes back. They removed the belt pulley that runs the supercharger and said the supercharger was fine. Ever since I replaced the ORIGINAL a/c compressor the a/c has been loud. This is the second a/c compressor since the original. The car has 92,000 miles on it.
My question is could the supercharger being blowing out the a/c compressor or could the a/c affect the supercharger?