Replacing the generator in a VAZ 2107 car is a rather rare phenomenon. This unit usually works flawlessly and does not need repair. However, in fairness, it is worth noting that he also has malfunctions, the elimination of which requires immediate repair, or even its complete replacement. The most common generator faults are listed below:
- Failure of the diode bridge (rectifier unit);
- Failure of the stator winding (open circuit, short circuit);
- Failure of the excitation winding (open or short circuit);
- Worn or hanging brushes;
- Worn or seized bearings;
- Failure of the voltage regulator.
These malfunctions in the VAZ 2107 are easily diagnosed, which cannot be said about their elimination. For example, bearing wear is accompanied by noise or knocking during operation. In order to make sure that the cause of its occurrence is damage to the bearings of the generator, loosen and remove the drive belt and wobble / crank the pulley. If there is play or difficult rotation, the bearings must be replaced immediately.
Unlike the mechanical problem described above, electrical faults are more problematic from a diagnostic point of view. The fact that the VAZ 2107 generator is not working is indicated by the battery charge lamp. But the cause of such a malfunction will be more difficult to establish. If you do not have sufficient experience in handling car electronics and special measuring instruments, then it is better to entrust this matter to specialists.
If you feel that you are able to solve the problem on your own, then proceed with the initial diagnosis of the malfunction. To do this, at least, you need to have a multimeter on hand, which can measure the voltage at the generator output and test the rotor and stator windings.
It should be noted that with a turn-to-turn circuit in the stator winding, a measuring device can be dispensed with. With such a malfunction, the generator emits a characteristic howl. In other cases, you will still have to remove the generator, disassemble it and try to determine the cause of the malfunction from the inside.
Usually, any of the above malfunctions is eliminated by replacing the failed element: rotor, stator, bearing, brushes. However, if the repair takes time, and the car is needed urgently, a known working generator is installed in the place of the faulty one. Usually, for classic cars, which include the VAZ 2107, separate replacement units are available from both motorists and workshops. After repairing the original generator, a reverse replacement is performed.
Removing a generator from a VAZ 2107 is quite simple. To do this, you need two keys, for 17 and 19, m penetrating grease type WD-40 in case you just can't unscrew the nuts. First, use a 17 wrench to unscrew the nut designed to tighten the drive belt, and then with a 19 wrench the nut that secures the generator to the engine housing.
