High pitch noise in engine bay

[itamnala]

Hi Guys,

Good day! I'm a newbie here and just bought an Explorer Sport Trac 2002 with 62thou km reading on it last week. The problem is, when the engine is running in idle, there is a high pitch sound coming from the engine bay. As the engine rpm goes up, the high pitch sound becomes stronger. It's like two tin metals rubbing each other.

I can't figure out exactly where it is coming from but I suspect the belt or the auto tensioner as the possible culprits. I am quite sure it is not from the engine itself.

Any help from anybody would be much appreciated. Thanking you all in advance.

 

[chad551]

Likely it is your belt tensioner. Mine made a loud noise as you describe and that was the culprit.

 

[itamnala]

Thanks Chad551 for the confirmation. Appreciate it.

 

[Clusterpup]

Take the belt off and turn everything by hand and see if anything is stiff or loose.