Have searched all over (both forums & google) and can't seem to find much info on if it is normal for my a/c compressor to be as loud as it is when engaging. I have found some complaints about the loud thump when the engine is first started and the compressor kicks in, mine does that too, but it seems that as its cycling on and off during driving that it is still overly loud. Almost sounds like I kicked a rock up into the fender each time it turns on. Can even hear it while driving On the freeway if the radio isn't on. The A/C otherwise works fine.