The ticking noise is the metal cooling.
The fuel injectors make the ticking noise you hear at startup, especially when the engine is cold (colder temperatures).
there is a rattling noise in the area of the serpentine bell
If you are loading a Cd-rom,or a program.
well it sounds like your lifters are ticking The connecting rods screaming LET ME OUT!!!
horses make neighing sounds
you may have a bent valve
98 Chevy new 383 block 30k, ticking noise from sounds like heads . 210k on heads;
Its not your brakes making the noise. Most liklly your CV joint is warn out.
Well if its sort of like a scratchy noise coming from the engine you might want to get your transmission checked out
Without the year, make or model of your vehicle it could be a bad compressor and or a bad compressor clutch.............
If your vehicle has a timing belt and not a chain, you need to replace it immediately. My distributor made the same ticking noise and it turned out to be the timing belt had a frayed piece on it and this piece was the source of the noise. Before I could figure it out, the belt broke and left me stranded on the roadside.