Hello there. In this video you are gonna hear the normal noise the car makes when it's cold (and was making when warm also) and the new noise it now makes when it gets more warm.
This started happening all of a sudden after a normal 15km drive. Starts after the car warms up a little. It's more prominent at 2.000rpm. The higher the rpm goes the higher pitched that drone is but you kind of lose it cause of the engine sound. Has gotten louder over the past month, starts earlier on the drive (was starting at like after 10km now after 1-2km) and earlier on the rpm range. Comes from the passenger side of the engine bay and at the feet height. You can hear it a lot more inside the cabin from that area
Things that have been checked and are not it
Removed the belt that runs the alternator etc and sound is still there.
Crankshaft harmonic balancer has been marked to see if it slips and it doesn't.
The little speaker under the wipers has been removed.
Sound doesn't change when you press the clutch.
Sound doesn't change when you open the oil cap.
Most of the engine bay has been heard with a stethoscope and the sound is a little bit louder when heard while revving in a place that I'm not gonna name cause I don't want to guide anyone's thought process yet.
Car mods
Inter-cooler
Oil cooler (now runs at 85C° compared to 95C°-100C° that was it's normal range)
Air Filter
Blow off valve
GPF delete
Custom tune to 240hp
27.000km on the car and has been tuned for a year