Hey guys so my 03 g35 sedan is starting to make this sort of wobble sound at idle. It's gotten to the point that it's loud enough for me to hear it from inside the cabin over my radio. Sometimes the sound stops when I'm at a light but it comes back. I don't notice the sound when I'm driving though, just idling at lights etc. The car is at 247xxxKM. Any help is greatly appreciated. Thanks in advance.

 

How old are your belts?

The last video that squealing noise actually sounds a little bit like when my water pump was seizing up. But, you could also just have a bad bearing in one of your pulleys.

If you're comfortable with a wrench and doing some work on your car you can try the following:

Use a stethoscope or long screwdriver to try and isolate the noise.
Remove the belt and spin all pulleys freely and listen for noise.
Remove AC belt and listen for noise. (If it disappears could be the AC Pulley or idler pulley)
Remove PS/Alternator belt and listen for noise. (It will light up your dash like a Christmas tree and run only enough to see if you hear the noise. The car will be straight off battery at that point). (If noise disappears it could be PS Pulley, Alternator, Idler Pulley, or the top Idler Pulley. The top idler pulley and water pump was my problem.)

If you still hear that squealing with all the belts off it's probably the water pump.

 

Sounds like a pulley going bad. Since you have an early 03 with the fan bolted to the engine, you can't delete that top idler pulley like 'coffeysm' did. You can try replacing the belts, but also check the idler pulleys. The fan clutch could also be a culprit here.

 

The belt snapped on saturday and I towed it to the shop. For future reference, it turned out to be a seized alternator pulley. Thanks for the help guys

 

That sucks glad you got it fixed though.