Should I be worried about unusual noises from my 1.8T's engine?

The 1.8T engine makes a number of noises which worry owners but are normal. These include:

A rattling noise like a diesel for a few seconds on startup from cold

This noise is from the hydraulic cam lifter. It stops after a few seconds when oil reaches the lifter.

A turbine-like sound after startup which disappears when the engine is warm

The turbine-like noise is the Secondary air pump operating. It pumps fresh air into the engine on a cold start to keep emmisions down and once the engine is at normal temp it will stop. The pump is mounted in front of the engine just slightly right of centre and looks a little like a siren.

A clicking/ticking noise from a black box attached to the offside wing

This is common to all the petrol engined Octavias. The black box is a charcoal cannister. It basically recirculates engine/petrol vapour fumes back to the petrol tank and the ticking noise is the pump/valve operating.