Noise from engine when its hot

Nov 12, 2021
7
1
Hello,

I have a Seat Leon ST (TSI 1.0) from 2019 bought 4 months ago (32000 Kms now). When the engine is hot (specially after driving with a lot of traffic) I hear a noise from the engine on idle. It isn't that rattling noise which is normal for this kind of engine, is a noise a bit lower in frequency and sounds like it is something moving circular (like a belt or a chain) pulsing two times every second. If I accelerate I don't hear this noise and I only heard it after driving past 20 minutes or so.

Sorry I can describe it better and it's difficult to recording since the sound is camouflaged with the engine sound.

Anyone can tell if this sound is normal?

Thank you!
Daniel