For a change it's not coming from the cabin 
At around 3k rpm and above I can hear a tinkling coming from the engine, now I'm pretty sure that when I got the car I never used to hear it.
I've tried coasting and the noise goes away so it's deffinately something to do with the engine, again this can be proven by revving it in neutral. It's especially audible when going down a road with parked cars either side or walls and it's beginning to bother me.
Has anyone any idea what it could be, or any steps I could take to work it out for myself? (bearing in mind I'm a complete car noob).
Thanks

At around 3k rpm and above I can hear a tinkling coming from the engine, now I'm pretty sure that when I got the car I never used to hear it.
I've tried coasting and the noise goes away so it's deffinately something to do with the engine, again this can be proven by revving it in neutral. It's especially audible when going down a road with parked cars either side or walls and it's beginning to bother me.
Has anyone any idea what it could be, or any steps I could take to work it out for myself? (bearing in mind I'm a complete car noob).
Thanks