My Weird Engine Squeak is Back

[HPsauce]

Originally Posted by steamship

With the covers off, I was watching closely and listening for the squeak. There wasn't any squeak, but that may have been because the covers were removed or because the engine had warmed up. I'll start the car tomorrow with the covers off and see if the squeal is still there or not.

And the result was what?

Almost certainly not relevant but the weird untraceable squeak from my engine bay turned out to be the alternator; identified and fixed by MJ.

Also, watching your video closely there's a lighter mark on the edge of the belt that comes round every second or so. That seems 100% synchronised with the lateral movement of the belt on the pulley.
So, my conclusion is that the belt isn't quite straight and that's causing the lateral movement. Manufacturing defect?

[steamship]

Originally Posted by HPsauce

And the result was what?

Almost certainly not relevant but the weird untraceable squeak from my engine bay turned out to be the alternator.

there's a lighter mark on the edge of the belt that comes round every second or so. That seems 100% synchronised with the lateral movement of the belt on the pulley.

So, my conclusion is that the belt isn't quite straight and that's causing the lateral movement. Manufacturing defect?

1. Totally forgot to update it. No squeak at all.

2. Having spoken with BrianB (donp38) at the annual meet, I checked and subsequently replaced the alternator as the rear bearing were shot. The squeak went away, so I assumed that was the cause at the time.

3. Never even noticed that. Went and checked and that is wear on the belt, either from rubbing on the bottom plastic cover or the side of the metal pulley.

4. Michaela mentioned that it could be the belt itself, but until I strip it down 'again', I won't know for sure.