Well is it fuel injection engine?
Fuel Injection have a tick sound on it. It will be there after you start the engine.
Mine engine also have the ticking sound. After modify I heard the sound once i go to pick up the car. Then i ask them, they told me it is the fuel injection sound.
Don't worry is it a Fuel Injection Engine or Carb Engine
Ya the air-cond compressor will make noise if it is not in good condition already. My cousin bro told me that, because he work as a accessories mechanic.
Make sure that