Good Day Ladies and Gents,

recently I had an issue with the supercharger coupler in my V6S.
Since the coupler had to be replaced, I decided to change the supercharger bearings and replace the supercharger oil.
After assembly, the old pulley and belt were installed onto the engine. Soon after the overhaul, the supercharger started making squeaking noises.

Today, I replaced the belt with a new one and the noise went away for around 5-10 miles and then came back again.

Can I ask for your advice what the noise might be?
Is it the old pulley? Are the bearing damaged (I would not want to remove the supercharger again…)

 

Sounds like it might be an SC belt tensioner/idler pulley bearing to me. They are cheap and fairly easy to replace.

However it might be unrelated to the SC belt and have something to do with an accessory driven by the serpentine belt like the alternator, AC compressor or water pump.

 

Thank you mate!
I would suspect the SC belt instead of the accesory one, because before replacing the belt, the noise was very lound and irritating. After replacing the belt, the noise went away and returned slightly after 10 miles, however Im sure it will get just as bad as before in a matter of a few days.

 

i may not be able to help, but the following was on my f-type. I changed the upper pulley, OEM replaced with the new GripTec part, which is much more grippy. After that, however, made the old belt back on it. However, has a maximum of 1500 Miles on it, more or less brand new. And immediately after the first start, I heard exactly the same noise as in your video. The volume should also be similar. After about 500 Miles the noise was gone, became quieter and quieter until it was completely gone. I assume that the belt had to run in on the new pulley first. And the OEM belt had a slightly different surface structure.

 

thanks @Andi Jaguar G , this might help as I did just a handful of miles since overhauling the compressor and changing the belt.
This is the noise I heard before replacing the belt with a new spare, much noisier