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Hello, I'm Brandon - VW tech.
There is diagnose it correct.
The Coolant Thermostat / Water Outlet Assembly , coolant temp sensor, radiator and vacuum pump will need to be replaced. This is the cause of the noise.
The other suspension parts are also important too.
What can I help you with?
Yes, these are the items that is causing your fan to turn and stay ON at high speed.
The suspension parts won't cause any engine noise.
Please rate me positive, thank you!
These are the suspension parts: The front tie rods, strut tops and bearings, Left Axle, both front control arms, and alignment.