There is this cyclical sound which I believe originates from the high pressure fuel pump, but I am not sure. Outside is about -10c at the moment and the engine is warmed up with coolant at around 70c.

I can't exactly pinpoint where the sound originates but its sounds like its comming from the driver's side of the valve cover.

Is this normal?

 

100% normal it's louder on colder days

It's the high pressure fuel pump.

 

Yup mines been doing that since day1 and I've got 171,000km on it. Not 1 engine problem yet.

 

Thanks guys, false alarm.

I'll leave this up as reference for others in the future.

 

Yup that sounds like a very healthy lnf