Schmintit Beemir

Hi all, John here. Recently joined the site, as i just bought my first beemer. Some advice on the engine would be really helpful if anyone can. It's an 05 plate 318, 2.0 petrol with 85k, and everything seems really tight and well except for a tapping from the engine when it gets warm. Will be doing the usual maitenece such as spark plugs and an oil and filter change to start off with, but any further ideas would be much appreciated.