|
The noise you are discussing is most likely coming from the transmission.
When you have your foot off the clutch pedal (clutch engaged) (and the engine is running) the input shaft and other shafts and gears and bearings are rotating in the trans. When you put the clutch pedal in these parts stop turning. (The clutch disc drives the trans input shaft when the clutch is engaged.) Have you checked the fluid level in the trans ? As suggested, the first step should be to check the fluid level but then to replace the fluid with a moderately heavy fluid. See if that reduces the noisiness. If the car is on a lift, you can have someone operate the car while another tech listens to the trans with a stethoscope.
|