-LS1-

iTrader: (4)

http://youtu.be/kWePDO6eKGY Hey guys, any idea what this "grinding" sound could be? It started 5 miles into an ls7 clutch break in; new parts put in were clutch/pressure plate, flywheel, throw out bearing, pilot bearing. My first thought was that it had to be related to the clutch job, and I thought maybe I didn't tighten down the slave cylinder tight enough when I put that back on and the shim developed a rattle after a few miles of driving. However it honestly sounds like it's coming more from around the area of the crank pulley now that I'm underneath it. In the video I pulled the serp belt off to see if it was one of the other pulleys, as you can see it wasn't. What else should I look into/how should I further diagnose this? Thanks in advance!
Edit: the sound at the end of the video when I put it in gear is the rear tires rubbing (since it's jacked up). I was trying to demonstrate that the sound sticks around even with the clutch disengaging and re-engaging.

wav3form

iTrader: (1)

Check the air gap on the AC compressor clutch?

LLLosingit

iTrader: (4)

Edit: In your video it looks like the AC belt is still on so Wav3form may be onto something. Try turning the AC on and see if the noise stops or changes.

-LS1-

iTrader: (4)

That's definitely it. The noise goes away when the A/C is turned on. Excuse me for being ignorant, but what do I have to do to fix this so that it doesnt grind while the A/C isnt in use? Is it one of the A/C pulleys that needs to be replaced? Or is the current one adjustable? (I just searched and there were only a few threads on here about the a/c air gap and none of them really explained how to adjust/fix it.) Thanks in advance!

wav3form

iTrader: (1)

I took mine to a shop to have the gap adjusted. I'm not sure if it's a press fit or if there are shims involved. Check youtube, there are some vids on there that show how to adjust the gap.

JohnS Z28

iTrader: (1)

its the compressor clutch,i have the same problem, i never fixed it but i know thats defiantly it. heres another thread about it
https://ls1tech.com/forums/general-m...ook-right.html