On the ZMZ0-402 engine, an ignition distributor sensor (1908.3706) is installed - contactless, with a sensor (generator) of control pulses and built-in vacuum and centrifugal ignition timing controllers.
The distribution sensor performs two functions: it sets the moment of sparking and distributes high voltage pulses to the cylinders in accordance with the order of their operation. For this, a slider is used, put on the shaft of the distribution sensor.
An interference suppression resistor* is installed in the slider.
The switch (1313734) opens the power circuit of the primary winding of the ignition coil, converting the control pulses of the sensor into current pulses in the ignition coil.
Ignition adjustment ZMZ 402
1 Set the crankshaft to a position corresponding to an ignition timing of 5°.
2. To do this, on the ZMZ-402 engine, we combine the middle mark on its pulley with the tide on the block cover (the end of the compression stroke of the first cylinder).
3. For the UMZ-4215 engine, we set the first mark on the pulley against the pin on the timing gear cover.
4. If the distributor sensor is not removed from the engine, then the compression stroke of the first cylinder is determined by removing the distributor cover, the slider should stand against the internal contact of the cover connected by a wire to the candle of the first cylinder.
Otherwise, we turn out the candle of the first cylinder. After closing the hole with a paper stopper, rotate the crankshaft. The air expelled from the plug will indicate the start of the compression stroke.
4. Using the “10” key, loosen the octane corrector screw
5 . We set its scale to zero division (the middle of the scale).
6. Using the “10” key, loosen the screw securing the octane corrector plate
Adjustment of the ignition moment of the ZMZ-4027 engine. By turning the housing of the sensor-distributor, we combine the "marks" (the red risk on the rotor and the arrow on the stator). While holding the sensor in this position, tighten the screw.
Make sure the slider is against the contact of the cover of the first cylinder and check the correct connection of the high voltage wires of the remaining cylinders - counting counterclockwise from the first cylinder in the order of 1-2-4-3.
After you have done everything, check the correct ignition timing while driving. We start the engine, warm it up and when we have already switched to fourth gear at a speed of 50 - 60 km / h, we sharply press the gas. If, at the same time, detonation (by sound it is similar to the knock of valves) appears briefly - for 1-3 seconds - the ignition moment is selected correctly. Prolonged detonation indicates an excessive ignition timing, we reduce it with an octane corrector by one division. The absence of detonation requires an increase in the ignition timing, after which the test must be repeated.
The ZMZ 402 engine is one of the products of the Russian auto industry, widely used in the automotive industry. These power units were equipped with individual models of Volga, UAZ, Gazelle cars. To ensure the normal operation of the motor on the machine, it is correctly set ignition. Next, you will learn how the distributor is installed on the 402 engine and what should be considered when completing the task.
In order to correctly set up and adjust the ignition of the ZMZ 402, you should know some aspects about the operation of the unit. On such motors, an installed contactless distributor, supplemented by a control signal generator and mounted advance regulators - vacuum and centrifugal (video creator - smotri Vidik).
The distributor is designed to perform certain functions:
- determines the moment of occurrence of a spark;
- transmits high voltage signals to the cylinders of the unit, taking into account the order of their operation.
For the correct dispersal of impulses, a slider mounted on the pulley of the mechanism is used. The slider is equipped with a resistor and is designed to suppress interference. The switching device performs the function of opening the circuit of the ignition coil winding, converting the control signals from the regulator into short-circuit current signals.
Read also
To set correctly ignition on the 402 engine, you need to take into account the properties of the accounting software (software) listed below:
How to set the ignition on a 402 engine carburetor.
- the order of functioning of the cylinders is at first the 1st, then the 2nd, later the 4th and 3rd;
- the rotor of the distribution element rotates counterclockwise;
- on a centrifugal device, the lead angle is from 15 to 18 degrees;
- on a vacuum device) myth indicator from 8 to 10 degrees;
- free play on the NW must not exceed 0.8 mm;
- the resistance index of the resistor is expected from 5 to 8 kOhm;
- the SZ resistance parameter should vary in the region of 4-7 kOhm;
- in the stator winding, the resistance level must be less than 0.45 and even not less than 0.5 kOhm.
Ignition on 402 engines.
We set the distributor drive correctly. We regulate ignition, video for citizens without driving skills. Everything is very simple.
Disassembled distributor for ZMZ
How to install yourself ignition?
How is the ignition installation done on the ZMZ 402? The crankshaft must be put in a position that corresponds to a lead angle of 5 degrees.
You need to set the moment like this:
- On the power unit, we combine the average risk on its shaft on the cylinder head cover, in other words, at the end of the compression stroke on cylinder 1.
- If the distributor has not been dismantled from the unit, there is an option to identify the compression stroke on cylinder 1 by opening its cover. It is necessary that the slider be installed opposite the internal contact, which is connected by means of a cable to the candle. If it is found that compression does not come out, the SZ installed in the first cylinder is dismantled. After this fact, the hole will need to be closed with rags, and preferably with paper. The crankshaft must begin to turn, at the moment when the cardboard cork is knocked out by the air flow, the compression stroke will begin.
- Now a 10 wrench will come in handy - thanks to its use, you need to slightly loosen the octane corrector bolt, while there is no need to unscrew the screw itself.
- Further, it follows expose its scale to zero, which is about the middle of the scale.
- After completing these steps, using a 10 wrench, you need to loosen the bolt that fixes the octane corrector plates.
- Now it is necessary to turn the distributor housing in such a way that the marks are aligned. Namely, we are talking about a reddish mark located on the rotor, in addition to the risk on the stator. When the installation of the device drive is completed, the distributor must be held in this position with one hand, the bolt is tightened with the 2nd hand.
Read also
1. Set marks. 3.5. Set the scale to zero. 3. Align the distributor marks.
Some expose ignition stroboscope. From time to time, setting the ignition timing does not give results - the engine continues to troit and does not work at full power. The reason is the inoperability of the distributor in general. The problem can be solved by replacing or repairing the distributor.
Video "Step-by-step installation of a distributor on ZMZ 402"
Adjustment of the ignition moment of the ZMZ-402 engine
Page 1 of 2.4
On the ZMZ0-402 engine, an ignition distributor sensor (1908.3706) is installed - contactless, with a sensor (generator) of control pulses and an integrated vacuum and centrifugal ignition timing controller.
During the operation of the car, periodically there is a need for adjustment work, whether it is the correction of the ignition angle or the adjustment of valve clearances. And the 402 engine needs to perform a valve adjustment procedure every 15 thousand kilometers, since if thermal clearances are violated, the internal combustion engine (ICE) will lose power and fuel consumption will increase. This article is about just that.
Frequency of adjustment work
Despite the fact that the ZMZ 402 engine has been discontinued, it remains quite popular among Russian motorists. This is due to the fact that it does not consume much fuel and is easy to maintain.
The frequency of adjustment directly depends on the driving style, vehicle load, and the correct use of a particular brand of gasoline. If the car is operated without a sharp drive, not heavily loaded, then the adjustment period is 15 thousand kilometers, if the vehicle is used for cargo transportation, then 10 thousand km. Well, if the wrong type of fuel is used for the cylinder head (cylinder head), regardless of the ignition system settings, valve clearances are adjusted after 5-6 thousand kilometers.
The GAZ car family is equipped with the following ICE models: 402, 405 and 406 engine. 402 engine is installed both on the Volga and on the GAZelle. Now it's time to move on to the indicators of acceptable standards.
Permissible clearance standards
Why are valves adjusted at all, and what will happen if it is not done on time? The consequences can lead to burnout of the cylinder and, as a result, to expensive and time-consuming engine repairs 402. In other words, this procedure allows you to maintain the internal combustion engine parts in working condition.
There are several clear signs that it's time for an adjustment procedure:
- knocking of valves in the engine;
- unstable work;
- power drop;
- increased fuel consumption.
Acceptable rates are shown below:
- 1 and 4 cylinders. For these cylinders, the tolerances on the suction valves will be in the range of 0.40-0.45 mm, and for the exhaust 0.35-0.40 mm.
- 2 and 3 cylinders. Here, the indicators for both intake and exhaust will be in the range of 0.40-0.45 mm.
The order of operation of the cylinders in the GAZ 402 engine is as follows: 1-2-4-3. A full duty cycle for a four-stroke engine is two revolutions of the crankshaft, which in degrees would mean 720 °, and for a two-stroke engine - 360 °.
Preparatory process
Before proceeding with the adjustment work with your own hands, you need to prepare the necessary tools and consumables, which include:
- set of probes for measurement;
- a set of keys (end or ring);
- new valve cover gasket;
- crankshaft ratchet key;
- candle key. Needed to unscrew the spark plugs;
- Phillips and flathead screwdrivers;
- clean rag.
Upon completion of the preparation, when all the required tools are prepared, you can proceed directly to the adjustment work.
The process of adjusting the angles of thermal gaps
For those who are wondering how to adjust the valves on a car with a 402 engine, the entire process will be presented below in detail. It is important to remember that the process itself should be performed on a cold engine, since a combustible mixture can burn a motorist on a warm engine.
Valve adjustment on a 402 engine is performed in the following way:
- Disconnecting the hose. The first step is to disconnect all hoses suitable for the valve cover, as well as the accelerator cable.
- Removing the air filter and valve cover. Then you should remove the air filter with the housing, and unscrew the 6 bolts securing the valve cover.
- Removing spark plugs.
- Setting the first cylinder to TDC. The next step in the adjustment process will be to set the first cylinder to top dead center (TDC). To do this, it is necessary that the third mark on the crankshaft pulley coincides with the mark on the body of the engine block. This is done by turning the crankshaft.
- Valve adjustment sequence. The valve adjustment procedure is as follows: 1, 2, 4, 6, the next step is to turn the crankshaft one full turn clockwise until the marks match. Further, 3, 5, 7, 8 valves are regulated.
- Adjustment process. Using a socket for 11 or a screwdriver, it is necessary to hold the adjusting screw, and at this moment unscrew the nut that fixes it. Using a feeler gauge of the right size, measure (the feeler should move with little effort), if the measurement of the thermal gap is normal, then you can proceed to the next valve.
- Installation work. The next step is to assemble in the reverse order, i.e. the spark plugs, valve cover with a new gasket are installed back, but the bolts must be tightened according to the recommended tightening torques (this figure is 0.5-0.8 N.m (kg.m)), air filter and hoses.
- Checking with the engine running. Now you should start the internal combustion engine and give it a little time to work until it warms up completely, then listen to its work. If there is no metallic ringing or dull clatter, this will mean that the adjustment of the thermal clearances is correct.
In this way, the valves are adjusted and the correct operation of the internal combustion engine is adjusted. This procedure is suitable for all cars with a 402 engine, whether it is a GAZ 3110 (Volga) or a GAZelle.
Summarizing
It's time to sum up a little. Timely adjustment of valves on cars with a 402 carburetor engine allows you to extend the life of the components included in the internal combustion engine, and is also responsible for the correct and trouble-free operation of the internal combustion engine itself. As you can see, the process itself does not take much time, but at the same time, when adjusting the thermal clearances of the valves, you should be careful in order to do everything right.
Set the crankshaft to a position corresponding to the ignition timing of 5 °. To do this, on the ZMZ-402 engine, we combine the middle mark on its pulley with the tide on the block cover (the end of the compression stroke of the first cylinder).
For the UMZ-4215 engine ...
... set the first mark on the pulley against the pin on the timing gear cover.
If the distributor sensor is not removed from the engine, then the compression stroke of the first cylinder is determined by removing the distributor cap ...
The slider should stand against the internal contact of the cover, connected by a wire to the candle of the first cylinder.
Otherwise, we turn out the candle of the first cylinder. After closing the hole with a paper stopper, rotate the crankshaft. The air expelled from the plug will indicate the start of the compression stroke.
With the “10” key, loosen the octane corrector screw ...
... and set its scale to zero division (middle of the scale).
Using the “10” key, we loosen the screw securing the octane corrector plate ...
... and, turning the housing of the sensor-distributor, we combine the "marks" (the red risk on the rotor and the arrow on the stator). While holding the sensor in this position, tighten the screw.
Make sure the slider is against the contact of the cover of the first cylinder and check the correct connection of the high voltage wires of the remaining cylinders - counting counterclockwise from the first cylinder in the order of 1-2-4-3.
We recommend that you additionally check the correct ignition timing while the vehicle is running. 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 (by sound it is similar to the knock of valves) appears briefly - for 1-3 seconds - the ignition moment is selected correctly. Prolonged detonation indicates an excessive ignition timing, we reduce it with an octane corrector by one division. The absence of detonation requires an increase in the ignition timing, after which the test must be repeated.
The ZMZ 402 engine is one of the products of the Russian automotive industry, widely used in the automotive industry. These power units were equipped with individual models of Volga, UAZ, Gazelle cars. To ensure the normal operation of the motor on the machine, the ignition must be set correctly. In this article, we will explain how the distributor is installed on a 402 engine and what should be considered when performing the task.
In order to properly configure and adjust the ignition of the ZMZ 402, you need to know some of the nuances about the operation of the power unit. On such motors, an installed contactless distributor, supplemented by a control signal generator and mounted advance regulators - vacuum and centrifugal (video author - smotri Vidik).
The distributor is designed to perform certain functions:
- determines the moment of the appearance of a spark;
- transmits high voltage signals to the cylinders of the power unit, taking into account the order of their operation.
For the correct distribution of impulses, a slider mounted on the pulley of the mechanism is used. The slider is equipped with a resistor and is designed to suppress interference. The switching device performs the function of opening the circuit of the ignition coil winding, converting the control signals from the regulator into short-circuit current signals.
To correctly set the ignition on a 402 engine, the system characteristics below must be taken into account:
- the order of functioning of the cylinders is first the first, then the second, then the fourth and third;
- the rotor of the distributing element rotates counterclockwise;
- on a centrifugal device, the lead angle is from 15 to 18 degrees;
- on a vacuum device, this figure is from 8 to 10 degrees;
- backlash in the NW should be no more than 0.8 mm;
- the resistance index of the resistor should be from 5 to 8 kOhm;
- the SZ resistance parameter should vary in the region of 4-7 kOhm;
- in the stator winding, the resistance level should be no more than 0.45 and no less than 0.5 kOhm.
Disassembled distributor for ZMZ How to install the ignition yourself?
How is the ignition installed on the ZMZ 402? The crankshaft must be put in a position that corresponds to a lead angle of 5 degrees.
You need to set the moment like this:
- On the power unit, we combine the average risk on its shaft on the cylinder head cover, that is, at the end of the compression stroke on cylinder 1.
- If the distributor has not been removed from the power unit, the compression stroke on cylinder 1 can be detected by opening its cover. It is necessary that the slider be installed opposite the internal contact, which is connected by cable to the candle. If compression cannot be determined in this way, it is possible to dismantle the SZ installed in the first cylinder. After that, the hole will need to be closed with a rag, and preferably with paper. The crankshaft must begin to rotate, and at the moment when the paper cork is knocked out by the air flow, the compression stroke will begin.
- Now you need a 10 wrench - with it, you need to slightly loosen the octane corrector bolt, while the screw itself does not need to be unscrewed.
- Next, you should set its scale to zero, this is approximately the middle of the scale.
- After performing these steps, using a 10 wrench, it is necessary to loosen the bolt that fixes the octane corrector plates.
- Now you need to turn the distributor housing so that the marks are aligned. In particular, we are talking about a red mark located on the rotor, as well as a risk on the stator. When the installation of the device drive is completed, the distributor must be held in this position with one hand, the bolt is tightened with the other hand.
Many expose the ignition with a strobe. Sometimes setting the ignition timing does not work - the engine continues to troit and does not work at full power. The reason is the inoperability of the distributor as a whole. The problem can be solved by replacing or repairing the distributor.
AvtoZam.com
Page 1 of 2
On the ZMZ0-402 type engine, an ignition distributor sensor (1908.3706) is installed - contactless, with a sensor (generator) of control pulses and built-in vacuum and centrifugal ignition timing controllers.
The distribution sensor performs two functions: it sets the moment of sparking and distributes high voltage pulses to the cylinders in accordance with the order of their operation. For this, a slider is used, put on the shaft of the distribution sensor.
An interference suppression resistor is installed in the slider.
The switch (1313734) opens the power circuit of the primary winding of the ignition coil, converting the control pulses of the sensor into current pulses in the ignition coil.
| Technical characteristics of the ignition system |
|
| The order of operation of the cylinders | |
| Direction of rotation of the distributor rotor | counter-clockwise |
| Ignition advance angle max, deg: |
|
| centrifugal regulator | |
| vacuum regulator | |
| Spark plug gap, mm | |
| Runner resistor resistance *, kOhm | |
| Candle tip resistance, kOhm | |
| Resistance of the central contact of the cover *, kOhm | |
| Stator winding resistance, kOhm | |
| * On part of the sensors, instead of a resistor, a cover with a central carbon contact is installed. |
Ignition timing adjustment
Set the crankshaft to a position corresponding to the ignition timing of 5 °.
| R |
is. 1To do this, on the ZMZ-402 engine (Fig. 1), we combine the middle mark on its pulley with the tide on the block cover (the end of the compression stroke of the first cylinder).
avtomechanic.ru
Adjustment of the ignition moment of the ZMZ-402 engine
On the ZMZ0-402 type engine, an ignition distributor sensor (1908.3706) is installed - contactless, with a sensor (generator) of control pulses and built-in vacuum and centrifugal ignition timing controllers. The distribution sensor performs two functions: it sets the moment of sparking and distributes high voltage pulses to the cylinders in accordance with the order of their operation. For this, a slider is used, put on the shaft of the distribution sensor. An interference suppression resistor* is installed in the slider. The switch (1313734) opens the power circuit of the primary winding of the ignition coil, converting the control pulses of the sensor into current pulses in the ignition coil.
Ignition adjustment ZMZ 402
1 Set the crankshaft to a position corresponding to an ignition timing of 5°. 2. To do this, on the ZMZ-402 engine, we combine the middle mark on its pulley with the tide on the block cover (the end of the compression stroke of the first cylinder). 3. For the UMZ-4215 engine, we set the first mark on the pulley against the pin on the timing gear cover. 4. If the distributor sensor is not removed from the engine, then the compression stroke of the first cylinder is determined by removing the distributor cover, the slider should stand against the internal contact of the cover connected by a wire to the candle of the first cylinder. Otherwise, we turn out the candle of the first cylinder. After closing the hole with a paper stopper, rotate the crankshaft. The air expelled from the plug will indicate the start of the compression stroke. 4. Using the “10” key, loosen the octane corrector screw 5. We set its scale to zero division (the middle of the scale). 6. Using the “10” key, loosen the screw securing the octane corrector plate Adjusting the ignition timing of the ZMZ-4027 engine. By turning the housing of the sensor-distributor, we combine the "marks" (the red risk on the rotor and the arrow on the stator). While holding the sensor in this position, tighten the screw. Make sure the slider is against the cover contact of the first cylinder and check the correct connection of the high voltage wires of the remaining cylinders - counting counterclockwise from the first cylinder in the order of 1-2-4-3.
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Adjustment of the ignition moment of the ZMZ-402 engine
Page 2 of 2
If the distributor sensor is not removed from the engine, then the compression stroke of the first cylinder is determined by removing the distributor cover, the slider should stand against the internal contact of the cover, connected by a wire to the candle of the first cylinder (Fig. 3).
Otherwise, we turn out the candle of the first cylinder. After closing the hole with a paper stopper, rotate the crankshaft. The air expelled from the plug will indicate the start of the compression stroke.
We set its scale to zero division (middle of the scale) (Fig. 5).
By turning the housing of the sensor-distributor, we combine the "marks" (the red risk on the rotor and the arrow on the stator). Holding the sensor in this position, tighten the screw (Fig. 7).
Make sure the slider is against the cover contact of the first cylinder and check the correct connection of the high voltage wires of the remaining cylinders - counting counterclockwise from the first cylinder in the order of 1-2-4-3.
After you have done everything, check the correct ignition timing while driving. We start the engine, warm it up and when we have already switched to fourth gear at a speed of 50 - 60 km / h, we sharply press the gas. If, at the same time, detonation (by sound it is similar to the knock of valves) appears briefly - for 1-3 seconds - the ignition moment is selected correctly. Prolonged detonation indicates an excessive ignition timing, we reduce it with an octane corrector by one division. The absence of detonation requires an increase in the ignition timing, after which the test must be repeated.
