Problems Problems!! Tick Tock Noise!

[mr302xd]

Hey guys.Pulled up to Maccas today and heard this loud kind of tick tock noise? It was coming from round the alternator coolant tank area?? I know i should go get it cheked by a mechanic but if i can avoid it that would b good.
I know tick tock noises could b anythin. But car has been runnnin a bit like a dogg latley a bit shuddery wen u get up it?

Any ideas woould really b appreciated!!!
Cheers