Two questions: 1. It is normal for your AC to let out a 'khat/metallic clunk' sound when turned on? This is an old problem. When I checked with the workshop (KHT), they told me it's normal. I have lived with it, but not been comfortable with it. The sound's annoying and I don't remember hearing it when the car was very new. 2. Immediately after the khat sound, I hear a slight whirl (krrrrrrrrrrr) sound from the engine bay. Is it normal too? Because the cabin insulation is good, I have always believed the sound to be coming from speeding bikers on the road. Only recently, while driving at night, I realised the sound was coming from the engine bay. Having said that, the AC still cools fine and I'm very happy with it otherwise. Just that the sound is annoying. Is there a fix?