knocking noise - radiator area!

Hi everyone. just bought a 2000 v40 1.6 xs (lpg) and looking for some assistance regarding a noise from the engine bay. The noise, is not from the engine, but the top right hand area of the radiator as you look down into the engine bay. It's a distinct knocking noise that can also be felt when touching the top of the radiator. Help!

It's not the little rubber mounts on the actual radiator is it? That, or maybe your cooling fan is stuck/catching somewhere. Hope this helps. Morphinemitt

Noise. 

Don't worry about it, the knocking noise you can hear/feel in that location is the evap purge valve. There was a mod to alter the bracket where it fits to the top right of the rad to quieten it. Paul.

Paul thanks for that = was worried it may have been something 'on the way out'! you've put a paranoid mind at rest thanks