I am having a similar issue too. Last year or so I discovered a high pitch sound and it would happen when it's moist and cool out. I would start my car, go to the store and get some food, come back home and chill for a few hours, go start the car and go to work.
When I'd start the car for the second time, I would hear a squeaking sound, it would eventually go away. So I changed the tensioner with an OEM MotorCraft part, I also installed a continental belt (it's like the old gatorback belts). From time to time the squeaking high pitch sound would be present but it wasn't as loud. Then my water pump went out and I thought the water pump was the problem. So after the water pump was replaced, the sound was still there. Now I think it's my alternator.
So I made a video so I could take it to the dealership to show the tech. and I uploaded the video on YouTube and I am providing a link. So have a listen and let me, us, know if it's similar to what you are hearing.
In the video, of course my engine kinda sounds like a diesel lol, but after the four second mark, you begin to hear a higher pitch sound and in my opinion, it could be a bearing squeal.
I have till March (when my powertrain runs out) to take it in and I'll keep you guys posted when/if possible.
https://www.youtube.com/watch?v=_EcaZuV9bNg&feature=youtu.be
---------- Post added at 11:27 AM ---------- Previous post was at 11:27 AM ----------
I am having a similar issue too. Last year or so I discovered a high pitch sound and it would happen when it's moist and cool out. I would start my car, go to the store and get some food, come back home and chill for a few hours, go start the car and go to work.
When I'd start the car for the second time, I would hear a squeaking sound, it would eventually go away. So I changed the tensioner with an OEM MotorCraft part, I also installed a continental belt (it's like the old gatorback belts). From time to time the squeaking high pitch sound would be present but it wasn't as loud. Then my water pump went out and I thought the water pump was the problem. So after the water pump was replaced, the sound was still there. Now I think it's my alternator.
So I made a video so I could take it to the dealership to show the tech. and I uploaded the video on YouTube and I am providing a link. So have a listen and let me, us, know if it's similar to what you are hearing.
In the video, of course my engine kinda sounds like a diesel lol, but after the four second mark, you begin to hear a higher pitch sound and in my opinion, it could be a bearing squeal.
I have till March (when my powertrain runs out) to take it in and I'll keep you guys posted when/if possible.
https://www.youtube.com/watch?v=_EcaZuV9bNg&feature=youtu.be