I have an 03 350z track edition 109k
new tranny
driveshaft
clutch
flywheel
slave/master cylinder
belts
ect..
magnaflow muffler

When i rev this car slowly to 7k rpm, it soundws great. But when i rev it very fast to 7k rpm, i hear a loud squeal around 5-6k rpm. Its really annoying and i feel like somethings about to go wrong with the car again.. any idea? i tried searching but didnt find an answer. people keep saying its a loose belt but idk. Please give me advice/feedback. Thank you.

 

Probably a loose belt. Do you have the owner's manual or maintenance book? I believe there's a section describing how to adjust the belts or tensioners.

 

Get a video of the noise.

 

Welcome and congrats on your Z33. As SmoothZ has said, the squeal you describe is likely from the accessory belt on the front of the engine. With the engine off, you can measure deflection and determine if it's too loose or tight. Check the FSM for specific details and you'll enjoy your Z more.

 

thank you all!! i will try this first thing in the morning. if this does not solve the problem, i will post a video of the noise.