The car is Renault Clio 2 mk1 1.2 gasoline, year 2000, 8V D7F engine with 140000 km / 90000 miles.
When I cold start the car in the morning that whistling sound appears.
After a while it dissapears, when the engine is warm it is okay. And If i start the car few hours later(when the engine is still warm) there is no strange whistling sound. That has happened 3 times in a row and it is getting worse.
Last owner said she changed timing belt 15000 km / 10000 miles ago.
What could be the cause? What could I look into? Thank you.
Update: Links to videos were broken, but now they should work.
Normal sound https://vimeo.com/384709505
Whistling sound https://vimeo.com/384710028
Engine bay picture a