Only happens when I don't have the clutch in. As soon as I put my foot down the noise stops. It's way louder when cold aswell. I changed the oil a few days ago, and it was happening beforehand.
http://www.aus300zx.com/forum/archive/index.php/t-321388.html Found this thread, may be of some help . :br:
It'll be your throw out bearing. No big deal, just a bit annoying. Many have driven on noisy throw out bearings for years without issue (myself included) Replace it next time you change the clutch :thumbup:
Kitty has had this noise since purchase, one day when I have to split the gearbox and motor I'll replace the throw out bearing (thrust race bearing), and the rear main oil seal.
Oooooowwwww Poor kitty she had her box split. Hahahahahahahhahahahzha i cant stop fu,,,,,,,, laughing Oowwwww sorryyyy guys lol
Clutch in? So clutch engaged (foot off of pedal) or disengaged? If you foot is off the pedal and making the noise its not the throw-out bearing, would look at input bearing if it is foot on pedal yes throw out, you can use spray grease on it (best to just drive till it dies)
Sounds like the throw out bearing. Thanks guys! It needs a new clutch anyway so I'll just do it all when I change that
The clutch throw out bearing is only engaged/spinning when your foot is down on the clutch pedal which causes the throw out bearing to contact the diaphragm spring on the clutch pressure plate. When your foot is off the clutch pedal the clutch throw out bearing should not be contacting the diaphragm spring on the clutch pressure plate and therefore should not be spinning. A faulty throw out bearing should only make noise when it is spinning. The throw out bearing should only be spinning when your foot is on the clutch pedal. If the clutch pedal has no free play then the throw out bearing could be spinning with your foot off the clutch pedal however you would expect the noise increase when you put your foot down on the clutch pedal. When the gearbox is in neutral and your foot is off the clutch the only bearings that are spinning are the gearbox input shaft bearings. When you put your foot down on the clutch pedal the gearbox input shaft will stop spinning. If you have a grinding noise in neutral that stops when you put your foot on the clutch pedal then the gearbox input shaft bearings are the problem. If you hold the rpm around 2000 and then put your foot down on the clutch pedal quickly you may hear the grinding noise wind down as the input shaft slows down until it stops.
Exactly what this man said.....if you remove your exhaust, prop shaft, gearbox and replace your throw out bearing and refit the gearbox and the prop and the exhaust you will be .......DISAPPOINTED.
Exactly what i was about to write. Clutch pedal not being pressed and noise from gearbox spells gearbox bearings as the gearbox gears will be turning and the thrust bearing will be stationary. It helps if people understand how things work in the first place when diagnosing. Spare parts people love people who guess. Thankfully there is the 300ZX forum. MichaelZ
