Contents: Examination ↓ Adjustment ↓
To perform the work you will need: a multimeter and a special 38 mm key for turning the crankshaft.
The angle of the closed state of the breaker contacts can be checked both on the car and on the removed distributor. The angle of the closed state of the contacts should be within 52-58°.
Examination
1. Prepare the vehicle for operations (see "Preparing a car for maintenance and repair"). We turn on neutral gear.
2. Disconnect the wire from the negative terminal of the battery (see "Battery - Removal and Installation").
3. Remove the distributor cap (see "Distributor Cap and Rotor - Check and Replace").
4. Using a special 38 mm key, turn the crankshaft (see "Front Crankshaft Oil Seal - Replacement") (on the removed distributor, turn the roller by hand) before installing the stop on the lever of the movable contact on the top of the breaker cam. Using a feeler gauge, check the gap between the breaker contacts, which should be within the range of - 0.35-0.45 mm.
5. A more precise check, taking into account the dimensional errors of the parts, can be performed by measuring the resistance in the circuit of the breaker contacts with an ohmmeter. To do this, prepare a circle with a marked sector of 55° and put it on the distributor shaft.
6. Connect one lead of the ohmmeter to the distributor body and the other to the contact bolt connected by wire to the coil lead.
The original can be found on the website (VAZbook)
7. Turning the distributor shaft (on a car - crankshaft), we set the position of the beginning of the opening of contacts (resistance tends to infinity). We align the right border of the sector with the center of the runner side contact. Then, turning the distributor shaft clockwise, we check the angle at which the contacts close (inside the sector the resistance is minimal).
If the angle does not match the required one - 52-58°, we will adjust it (see below).
8. Remove the key from the crankshaft pulley mounting nut.
Adjustment
1. Using a slotted screwdriver, loosen the screw securing the breaker contact group.
2. Using the same tool, loosen the adjusting screw. By moving the contact group, we adjust the gap in the contacts. By bringing the group closer to the cam, we reduce the angle of the closed state and vice versa.
3. After tightening the adjusting screw, repeat the check (see above). When the angle is set correctly, tighten the second screw securing the contact group.
4. Install the cover in place. After adjusting the angle of the closed state of the breaker contacts, it is necessary to check the correctness of the ignition timing.