Hi Amarin,

I was just passing by, using the “all” tab!
I agree with your post about bearings.
But most importantly the serpentine belts on cars can be an issue!
They make noises like a thumping while going over pulleys, especially, where there is a splice in the belt and a idler or tensioner bearing is running on the dry side of lubrications.
A belt tensioner can setup a rhythm and you never see it do a wiggling movement but the sounds travel into the brackets and engine block.
Stethoscopes can help!

I would take the serpentine belt off, for a minute or so and run the engine to listen for a change with less soundings. Chirps can be considered squeaks that are actually slippages into and leaving a groups of groove sides.
Really, their just a bunch of V belts made shorter in heights. All V belts age and make squishy sounds eventually. Some a lot quicker than others!
It’s why I have like the industrial belts materials better and consequently learned the differences.

The automotive brand GatorBack belts, made by GoodYear, are an extension or play against these.
Now, Continental purchased into GoodYear design and its unique material composition. They are emerged into their Elite branding.
They didn’t buy the “GatorBack” or the “The Quiet Belt” trademarks, from what I can tell?
I hope the industrial belts are still made on the North East coast and that plant didn’t get closed!

If this car has lots of miles, it might be a timing chain or belt thumping and clacking. The engine has too many of “noises” in it, for me. One might be the metallic sounds of valve train noise or some piston slap. We don’t know the operating temperature. Newer thin oils don’t dampen sounds as much.

In the video, the darn key and seat belt chime kills the whole experience of listening!
Isn’t there a switch on these cars, to push in, or does it use the newer proximity gadgetry for sensing the door open.
He could have least closed the door with the window down!
Just goes to show you how we can adapt and ignore things!

Off I go, scrounging to find a post to entertain me!

Phil