64. Extraneous noises
1. Normal road noise - cannot be corrected.
2. Tire noise - check the condition of the treads and tire inflation pressure.
3. Wheel bearings are worn or damaged, or their tightening force has weakened.
65. Vibrations
1. Check the condition of the wheel bearings by alternately jacking up the corresponding corner of the car and rotating the wheel manually. Listen to the sounds coming from the bearing. Remove the bearings and check their condition.
66. Oil leaks
1. Differential seals are damaged.
Original article on the web portal opelbook.ru
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