Hi
Im looking to re-light this debate...
My clutch has been bad for a while (pressure plate)
Got clutch here ready to do myself.
Ive noticed a noise getting louder and im certain its gearbox input shaft bearing, u can hear it best stood outside the car when its parked infront of a wall
Its making a racket and when clutch is fully pressed in the noise go's completely. Ive only ever know this as gearbox input shaft bearing.
Cause as others have explained when you push clutch in the input shaft shaft stops spinning... its simple logic
Looking on google the only other explanation of noise that gos away when clutch pressed in is a 'pilot bearing'
Fn2 doesnt have a 'pilot bearing' it has a Pilot bushing, theres no spinning bearing there
All info on google for noisy clutch release bearing says the same 'if the noise is there when clutch pedal is fully pressed in then gos away when you let the clutch out, this is a bad / noisy clutch release bearing
Im no expert on fn2, only had mine 7 mths, ive never split a gearbox but after watching several superb and detailed step by step videos on youtube showing k20 gearbox splitting / rebuild / input shaft bearing replacement its pretty easy if your ur used to fixing your own cars were you can
When my box is out im not gonna risk not doing the input shaft bearing and the noise still being there after doing the clutch.
A genuine honda input shaft bearing is around 47quid..
I really cant see grounds for an argument for the noise being there why clutch is out and going away when you press clutch fully in
Only crys 'gearbox input shaft bearing to me'
Below taken from one of many results on google
Diagnosing a Clutch Bearing or Bushing Noise
SKF See more from SKF
The Clutch Release Bearing
This applies force to the release levers or fingers. In doing so, the release bearing disengages the clutch. The release bearing is designed to operate with minimum friction between the rotating and stationary points of contact. If noise develops from the bell housing area, a few checks can be done.
Start with a road test of the vehicle. Listen for noise with the transmission in gear and the clutch pedal to the floor. Next release the clutch with the transmission in first gear. Noise under this condition indicates a worn release bearing or a worn pilot bearing.
To isolate the two, keep the clutch pedal on the floor and shift the transmission into neutral. If the noise persists, the release bearing is bad. If the noise is gone, the pilot bearing is bad.
A bearing noise that occurs when releasing the clutch pedal to engage the clutch while in neutral, but goes away when the pedal is depressed is caused by a bad transmission input shaft bearing.
Always make sure that all other components are in good condition. Check the clutch linkage for binding or mis-adjustments. Check clutch pedal free play and pedal reserve for proper setting. Check the clutch fork and input shafts for proper alignment