English
Causes of clutch noise
Clutch noise such as whistling or clonking is not always an indication of a defective clutch.
Whistling noises may e.g. also be caused by off-center contact of the clutch release bearing, a non-centered transmission input shaft, or a defective pilot bearing.
Rattling noises may be due to load alterations if clutch disks are furnished with preliminary dampers. These noises do not impair the function or service life of the clutch disk.
Additional possible causes include installation of the wrong parts, or installation of the clutch disk in the wrong position.
Causes of clutch noise - Therefore check:
- Correct parts installed ?
- Correct installation positions ?
- Pilot bearing installed and in good condition ?
Clutch Disc torsional damper worn
Cause::
- Low-revving driving style, i.e. driving at low speeds in high gear and full throttle
- Extreme irregular engine operation
- Worn joints in the driveline
Consequence:
- Overloading of components
Cover torn off torsional damper
Cause:
- Clutch housing and crankshaft housing flange not centered, Wobbling motion due to angular or parallel deviation
- Pilot bearing missing, transmission input shaft not guided
Consequence:
- Loose components brush adjacent parts.
Please note:
Also usually causes drag.
Wear-induced grooves on inner ring of clutch release bearing
Cause::
- Off-center clutch release bearing contact due to parallel deviation
- Worn guide tube
- Insufficient clutch release bearing preload
Consequence:
- Relative movements cause various types of noise.
Hub spline no longer present
Cause:
- Spline ground off hub due to irregular engine operation
- Alignment error, parallel deviation
Consequence:
- Loss of connection between engine and transmission
Please note:
Causes noise in early stages.
Interfacing springs torn off around clutch disk
Cause:
- Clutch housing and crankshaft housing flange not centered, Wobbling motion due to angular or parallel deviation
- Pilot bearing missing, transmission input shaft not guided
Consequence:
- Loss of connection between engine and transmission
Please note:
Causes drag problems and noise in early stages.
