In the article, we will look at how to replace candles and adjust the ignition timing

Replacing spark plugs

Using a compressor, we blow compressed air into the candle nests

How to change spark plugs and set UAZ ignition timing

Remove the tip of the high-voltage wire from the candle

How to change spark plugs and set UAZ ignition timing

Unscrew the candle with a high head at 21

For a properly working spark plug, the color of the center electrode insulator skirt should be gray or light brown

How to change spark plugs and set UAZ ignition timing

Clean the spark plug and check the gap between the spark plug electrodes with a round wire gauge

How to change spark plugs and set UAZ ignition timing

Gently bending the side electrode, we achieve a gap of 0.8-1.0 mm

We make sure that the sealing washer of the candle is present

We screw the candle into the head of the block, first by hand, then tighten it with a key. Tightening torque of the candle 3-4 kgf.m

We put on the tip of the high-voltage wire

We replace the rest of the candles in the same way

Ignition timing

How to change spark plugs and set UAZ ignition timing

Set the crankshaft with the handle to the position corresponding to the ignition timing of 5°

How to change spark plugs and set UAZ ignition timing

Combine the middle mark on the crankshaft pulley with the tide on the block cover at the end of the compression stroke in the first cylinder

How to change spark plugs and set UAZ ignition timing

The compression stroke is determined by removing the ignition distributor cap

The runner should be against the internal contact of the cover, connected by a wire to the spark plug of the first cylinder

Or turn the candle of the first cylinder inside out. We close the candle hole with a paper stopper and rotate the crankshaft

The moment the plug exits corresponds to the start of the compression stroke

How to change spark plugs and set UAZ ignition timing

How to change spark plugs and set UAZ ignition timing

Using a 10 wrench, loosen the octane corrector bolt and set its scale to zero division

How to change spark plugs and set UAZ ignition timing

Using a 10 key, loosen the octane corrector mounting bolt and, turning the distributor sensor housing, align the marks (red risk on the rotor and arrow on the stator).

How to change spark plugs and set UAZ ignition timing

While holding the sensor in this position, tighten the bolt.

Make sure the slider is against the contact of the first cylinder cover and check that the high voltage wires of the remaining cylinders are connected correctly - counting counterclockwise from the first cylinder ndra is in order 1–2–4–3.

We recommend that you additionally check the correct ignition timing while driving.

To do this, moving in fourth gear at a constant speed of 50-60 km / h, sharply press the "gas" pedal.

If, at the same time, detonation (it sounds like a knock of valves) appears briefly - for 1-3 seconds, then the ignition moment has been chosen correctly.

Continued detonation indicates excessive ignition timing.

We reduce it by one division with an octane corrector.

The absence of detonation requires an increase in the ignition timing, after which the test must be repeated.