To check the ignition timing on the car, there is a scale 1 (pic. 52) in the hatch of the clutch housing and mark 2 on the flywheel. One division of the scale corresponds to 1°of rotation of the crankshaft. When the mark on the flywheel is aligned with the middle (long) by dividing the scale, the pistons of the 1st and 4th cylinders are in the TDC. When running the engine on the stand, you can set the ignition moment using mark 3 (pic. 53) on the crankshaft pulley and marks on the front timing belt cover. Mark 1 corresponds to the ignition advance by 5, and mark 2 corresponds to the position of the w.m.t. pistons of the 1st and 4th cylinders.
Pic. 52. The mark on the flywheel and the scale on the clutch housing for setting the ignition timing
Pic. 53. Marks for setting the ignition timing located on the crankshaft pulley and the front cover of the toothed belt
Check and set the ignition timing using a stroboscope, proceeding in the following order. Connect clamp «plus» stroboscope with terminal «plus», ground clamp with terminal «minus» battery, and the strobe sensor clamp is connected to the high voltage wire of the 1st cylinder. Start the engine and direct a flashing stream of strobe light into the hatch of the clutch housing. If the ignition timing is set correctly, then when the engine is idling, the mark on the flywheel should be one division less than the middle division of the scale 1 (see fig. 52).
To adjust the ignition timing, stop the engine, loosen the nuts of the ignition distribution sensor and turn it to the required angle. To increase the ignition timing, the distributor sensor housing should be turned clockwise, and to decrease it, counterclockwise (when viewed from the side of the cover of the ignition distributor). Tighten the fastening nuts and check the ignition timing again.
For the convenience of adjusting the ignition timing, there are divisions and signs on the flange of the distribution sensor «+» and «—», and on the body of auxiliary units - the mounting ledge (see fig. 34). One division on the flange corresponds to approximately five degrees of rotation of the crankshaft.