Execution sequence
1. Check the travel of the clutch pedal (see fig. "Clutch") and adjust it if necessary (see below, "Clutch release actuator - adjustment").
2. With the engine off, press the clutch pedal several times. We are convinced that there are no jams in the clutch release mechanism, the absence of squeaks, knocks and other extraneous noises.
3. We start the engine. If a howling sound is heard from the clutch housing, then the clutch release bearing is most likely worn out. Disconnecting the cable from the clutch release fork (see below, "Clutch cable - replacement") and slightly turning the fork clockwise, we remove the release bearing from the diaphragm spring. If the release bearing is defective, the sound will disappear.
4. With the engine running, press the clutch pedal all the way and shift into gear. Switching on should be easy, without crackling or crunching. If a crackling sound is heard when shifting gears, and turning off is difficult, then the clutch is not completely disengaged.
5. With the engine running and the first gear engaged, gradually releasing the clutch pedal, we check the smooth engagement of the clutch, the absence of jerks or extraneous sounds at the moment of starting.
6. In motion in third or fourth gear, sharply press the pedal "gas". If the speed of the crankshaft increases quickly, and the car accelerates sluggishly, then the clutch slips. This is also evidenced by the appearance in the cabin of the smell of burning, emitted by the highly heated friction linings of the driven disk.
If the above symptoms of malfunctions are not detected during clutch diagnostics, the clutch is in a technically sound condition.