Tags for setting the ignition timing
1 - TDC mark on the crankshaft pulley;
2 – a label of an advancing of ignition on 10°;
3 – a label of an advancing of ignition on 5°;
4 - ignition advance mark by 0°
To check the ignition timing, there are three marks 2, 3 and 4 on the cover of the timing mechanism and mark 1 on the crankshaft pulley, corresponding to the TDC of the piston in the first and fourth cylinders, while coinciding with mark 4 on the cover. Initial ignition timing for various engines and gasolines used (see subsection 3.7).
1. connect clamp «+» stroboscope with terminal «+» battery, ground clamp - with terminal «-» battery, and connect the stroboscope sensor clamp to the high voltage wire of the 1st cylinder.
2. Mark with chalk mark 1 on the crankshaft pulley for better visibility. Start the engine and warm it up so that it runs at minimum idle speed.
3. Point the flashing strobe light at the pulley and check that the position of the pulley mark 1 matches the ignition timing values (see subsection 3.7).
4. To adjust the ignition timing, stop the engine, loosen the ignition distributor mounting nut and turn it to the desired angle. To increase the ignition timing, the distributor housing should be turned counterclockwise, and to decrease it clockwise.
5. Then check the ignition timing again.
6. If there is a diagnostic stand with an oscilloscope, then it can also be used to easily check the ignition timing setting, guided by the instructions for the stand.
7. Install the ignition distributor removed from the engine in the following order:
- remove the cover from the distributor, check and, if necessary, adjust the gap between the breaker contacts;
- turn the crankshaft to the beginning of the compression stroke in the first cylinder, and then, continuing to turn the crankshaft, align mark 1 with mark 3;
- turn the rotor in such a position that its outer contact is directed towards the contact of the first cylinder on the distributor cap;
- while holding the distributor shaft from turning, insert it into the socket on the cylinder block so that the center line passing through the spring latches is approximately parallel to the engine center line;
- fasten the distributor to the cylinder block, install the cover, connect the wires, check and adjust the ignition setting.