and I'm sure you know that by now. After performing the 60k maintenance on my previous Z, I had a high pitch squeel develop after about a thousand miles. After much hesitation and denial, I finally tore into the front of the motor and found the auto tensioner pivot bolt had worked it's way way out and the only thing stopping it from backing out all the way was the metal timing belt cover. After removing the lower t-belt cover, the tensioner pulley fell off. Prior to taking the cover off, it had about a 30 to 40 degree tilt. The auto tensioner was a brand new unit purchased from courtesy nissan. Hope the repair goes well for you.
