Hello,
I replaced both of my drive belts on my 2006 G35x about two weeks ago. The next day, there was an extremely loud squealing sound on start-up which went away once the power steering/alternator belt was tightened up. There were no issues for the last 9-10 days, until today when I started my car. On the initial start, it was rough for a moment and there was a squealing sound for a few seconds. Now, there is a squealing sound once I turn my steering wheel. Could this be because of the drive belt being loose again? I used OEM belts and I checked and the power steering belt does not feel too loose, but I do not have a tool to check the exact measurement of tension/deflection. I am hoping that it isn't something more serious, it is just odd to me that it only squeals when I make a turn. The sound does seem to me like a belt squeal but I am not sure at this point. I can try to tighten it again but I figured it wouldn't squeal only from turns if this was the case. Any help is greatly appreciated, thanks!

 

Sometimes the belt will stretch after putting some miles on them. It's not uncommon to have to go back and tighten them up a bit

 

I can almost guarantee you are not correctly tensioning the belt, get the gates kriket tool so you can actually measure how many pounds of force is on the belt then set it to the factory service manual specifications listed in section MA - Maintenance.

 

Thank you for the help, I just ordered the tool because the sound happened again. It hasn’t done it in the last few days but seems to do it when its 80+ degrees out. Any idea why the belt would squeak when it’s hot out? Hopefully it’s a little loose and tightening it will solve the problem