i have the same problem, this morning i started my car, and heard the screeching noise and my rpms were at like 1300 when normally i idle at like 800 rps so i turned my car off and started it again and it was gone. it happens once and a while when my cars cold.

 

same problem and how could it be the belts its not a screechingnoise i think they are talking about its more like a grinding noise. im glad to hear a lot of people have this problem and not just me

 

Why do noobs never search but instead bump threads....

VTC sprocket in engine






http://my350z.com/forum/forced-induc...tensioner.html

 

Im sorry for resurrecting a dead thread but i would like to hear from anybody that has had this happen to them, and if there was any long term damage that was caused to their engines due to the faulty vtc sprocket. My other concern is that i have a very subtle knock sound coming for my drivers side bank, i placed a screwdriver on the cover that is directly over the sprocket and that seems to be where the sound is coming from. I was wondering if a faulty vtc sprocket could also be the cause of this annoying sound i am hearing.

I have had my g35 since october of last year and purchased it with a little over 43k on it and have taken very good care of it since, i brought the car to a local nissan dealer to get it checked out and they determined that it was nothing to worry about. I've been checking my oil religiously and its where it needs to be, so low oil is not the problem.

Anyways ill try to upload a video as soon as possible!