Quote:
Originally Posted by MoulaZ
So after putting this on hold for months as lot of other personal things were going on at the time (focus dominated by work, and what was left over on becoming a dad) finally had a chance to take it out a few nights ago and reassess. Swear it's getting worse and I'm reaching out to COMP. Horrible grinding noises in the few seconds before it stops spinning when engine is shut off. At about 6000Km / 3900 miles since install now.
I'll be going under on the weekend and seeing if I still have a zerk fitting... maybe I'm another victim of the dreaded loose zerk fittings, who knows. I sure don't. 
https://www.youtube.com/watch?v=_gMXGTV96SY |
Got your email as well, I forwarded it to COMP.
To me, this is a normal sound. If you give it a few shots of grease it will go away. This is what ceramic ball bearings sounds like when dry. I had a Precision turbo that sounded very similar after the car shuts down, and it would spin for 20-30 seconds after shutdown.
If there was issues with the rotation assembly contacting any surface of the compressor or turbine, you would not hear it spinning like this.
It is the ball bearings that are making the sound.