Weird Sounding Engine in Idle
 

Hi Everyone,

I have a 2008 Mazda 3 GT (2.3L) Hatchback and I hadn't noticed this when I got the car (only couple months ago) but it has started to catch my attention that when I'm in idle (whether the engine is at temperature or below) I have noticed that the engine is starting to sound kind of funny.

To me it sounds almost electronic-sounding (if thats a way to describe it) my best guess would be coming from the timing-belt somehow so I was wondering if it might be due for a change? I am only at 90,000 km and I thought they should usually get changed around 120,000-160,000 km?

Anyone think it could be something else?

Thanks for the help and advice!

I think it has a timing chain, but maybe the serpentine belts making noise, also the AC compressor kicks on and off even during the winter.

Thanks, I'll have to look into it...