Kia Rondo 2012 EX 2.4, loud grinding noise while idle

What is your question?

Recently i started to hear a loud grinding noise upon starting the engine, sometimes it last for just a second or 2 , sometimes it lasts for 2 min, i had to switch the engine off then start again so it disappear. trying to narrow it down, i noticed that after i start the engine and everything works as normal, it will happen if i turned on the blower fan ( just fan not AC), last for few seconds, then happen again if i switch the fan off, but last for a while at this time that i may have to switch the car off. i looked on the engine upon starting, all the pulleys seems rotating well. the car is about 63000 miles. drive belt tension seems well and no wearing singes on it. i am really confused what that noise could be coming from, any ideas to troubleshoot would be great, thank you

What makes this problem better or worse?

when strating or switching the blower fan

How long has your 2010 Kia Rondo had this problem?

1 month