Scraping sound under hood

[BlackMetal]

I can't give too much information, this sort of thing is hard to diagnose online, but I figured I would see if there's anything common to consider.

I popped my hood today after being on the highway for about 25 minutes, and I heard what I can only call a quick scrape sound about once per second. I recently changed my intercooler to one with a Dutt neck, so I thought maybe I had positioned something close enough to come in contact with the intercooler fan, but it looks like that's not the problem.

I had my friend take a listen and he didn't have much better ideas except maybe a bearing going bad on one of the pulleys?

Again, I know this sort of thing is hard online, I'm considering trying to get it on audio or video tomorrow when I wake up. But for now...anything common that it could be? I will say...I checked it again when I got home and I laid under the front of the car, and it seemed that I could hear it easier at the bottom than I had earlier in the day from the engine bay.

 

[Dayton]

Try taking the belt off and start the engine. If the noise goes away its something the belt drives, Also could be a loose crank sensor. Worse case senario would be the turbo. HTH

 

[detaildave]

I Had A Similar Noise,,,,check Your Torque Converter Bolts .mine Backed Out And Rubbed On The Inspection Cover (look For Scrape Marks On The Inspection Cover .....hope This Helps

 

[TurboBuRick]

A/C Clutch or pully?

 

[BlackMetal]

Alright, thanks for giving me a place to start. Hopefully it's nothing serious, can't say I notice any issues with performance, just the noise.