"Chevrolet Niva" (VAZ-2123) - engine: device, characteristics, repair

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:41

The domestic engine 2123 is installed on cars of the Chevrolet Niva series and some other cars. The motor has a decent power rating for its class, among the design innovations is a four-cylinder design with a vertical placement mechanism. The unit has an integrated fuel supply control option; it complies with the Euro-2 standard for the emission of harmful substances. If we compare the updated model with its predecessors, one noticeable plus can be noted - a reduced noise level. This figure was achieved thanks to the presence of hydraulic chain tensioners and a single-row transmission mechanism.

The picture shows the engine from the front:

1. Idler pulley.
2. Compressor drive belt.
3. Coupling.
4. Thermostat.
5. Throttle.
6. Outlet pipe.
7. Pump pulley.
8. Phase indicator.
9. Stretchroller.
10. cylinder head.
11. Generator.
12. Pump pulley.
13. Support roller.
14. Cylinder block.
15. Drive belt.
16. Crankshaft indicator.
17. Auxiliary pulley.
18. Compressor drive pulley.
19. Crankcase pan.

Characteristics of the VAZ-2123 engine

The following are the main parameters of the motor in question:

• a kind of "engine" - a four-cylinder gasoline engine with electronically controlled fuel injection;
• power indicator - 80 hp p.;
• working volume - 1690 cu. see;
• fuel tank capacity - 58 l;
• speed threshold - 140 km/h;
• max torque - 127.5 Nm;
• gasoline consumption in mixed mode - 10-11 l / 100 km;
• compression – 9, 3;
• cylinder size in diameter - 82 mm;
• number of valves - 8 pieces;
• weight - 127 kg.

It is worth noting that the 2123 engine was mounted not only on the Chevrolet, but also on modifications of the VAZ-21213, VAZ-21214.

Design Features

The design of the camshaft of the motor in question, in comparison with its predecessors, has not undergone any special changes. The mechanism is also equipped with a bush-roller type roller chain, which is placed in one row. Therefore, all the sprockets of the unit are in a single row configuration. As a result, the developers managed to improve the operation of the oil transfer pump. Oil change intervals remain the same.

The rest of the units and parts are also notunderwent global processing, formed according to the principle of modification 21214. An additional confirmation of this fact is the installation of a spring-hydraulic system, which has characteristic features for most of the latest VAZ models. The engine cooling arrangement of the 2123 Chevrolet Niva is equipped with a liquid pump and a generator, which are driven by a crankshaft pulley. The traction force is transmitted by the V-ribbed belt.

View of the motor on the right is shown in the top picture:

1. Starter shield.
2. Flywheel.
3. Release Collector.
4. Tube.
5. Receiver.
6. Throttle.
7. Thermostat.
8. Coolant pump.
9. Compressor.
10. Cylinder block.
11. Drain plug.
12. Right support.

Major changes

The transmission in the motor of the series in question is called Gates. This is a regular belt with the following characteristics:

• Standard length 1888mm;
• element width – 17 mm;
• number of wedges – 5 pieces

In the updated 2123 engine, the following updates are also included in the design nuances: a different configuration of the engine compartment and a redesigned bridge beam. The shape has changed due to the lack of a front axle gearbox lock directly to the power unit. Therefore, this variant is not compatible with accessories and elements of earlier versions from this manufacturer.

Air intake

New Chevrolet Niva (2018)equipped with a completely redesigned air intake system. The main difference is a significant increase in the dimensions of the air filter. This is visually noticeable in the impressively grown body. In addition, the design of the inlet pipes, receiver, throttle element has changed.

The electronic system of the vehicle has also been transformed. The main control of the “engine” is carried out by the Bosch controller. In other variations, an analogue of "January 7, 2" was mounted. This feature affects the comfortable interface for the consumer, and also allows you to control fuel consumption thanks to an improved injection control system with a parallel pair configuration. As a result, the new Chevrolet Niva (2018) began to comply with Euro-2 standards in the standard version. To reduce the emission of harmful substances, it is possible to additionally install a phased fuel supply. This approach raises the bar for sustainability to Euro 3 while optimizing its more accurate delivery.

Other transformations

Among other alterations and innovations in the version under consideration, the following points can be noted:

• Fuel mechanism with Siemens injectors.
• The ignition module has not changed, copies analogues from the modification period 2112.
• The generator is marked with serial number 9402.3701-01. The element is at the top.
• As a starter for ignition, a model is provided under the index 5722.3708. Main featurenode - the presence of a planetary type gearbox, the power limit is 1.55 kV.
• The power unit is protected by a reinforced plastic casing.

Faults and repair of the VAZ-2123 engine

The following are the main breakdowns of the motor in question and how to fix them:

1. Excessive clogging of the fuel lines causing insufficient fuel to enter the combustion chamber. The problem can be solved by flushing the system with water or compressed air.
2. Deterioration of the filter element and malfunction of the connections between the engine and the gasoline supply pipe. To ensure normal fuel supply, it is necessary to replace the filters, repair the connections.
3. Pump malfunction (not enough fuel or not at all). The filter needs to be cleaned or replaced.

Engine stalls at idle or while driving

In this case, problems with the 2123 engine may be of the following plan:

1. There is no required level of pressure in the fuel supply system (the same applies to diesel modifications). Check the he alth of the pump, if necessary, repair it or change it to a new version.
2. Violation of the adjustment of the functioning of the power unit at idle. The regulator needs to be replaced, as it is very troublesome and time-consuming to repair it yourself.
3. There is an unstable crankcase ventilation, air enters the brakeboosters or fuel supply hoses. It is necessary to check the integrity of all hoses and connections, as well as tighten the existing clamps.

Power mismatch with rated power

In this regard, the engine 2123 has the following problems:

1. Incomplete throttle opening. The throttle should be checked and corrected. Special skills are not required here, it is quite possible to solve the problem yourself.
2. Breakdown of the electronic element in the throttle position sensor, causing insufficient supply of gasoline to the working chamber. In this case, it is best to simply replace the faulty indicators with new ones.
3. Irregularities in the ignition system. They check the batteries and the condition of the spark plugs.

Modernization

There are several methods to improve the design of the VAZ-2123 engine. Tuning will make it possible to slightly increase the power parameter and improve overall performance. Too high results from modernization should not be expected, nevertheless, certain progress will take place. Before carrying out work, it is worth considering: is the game worth the candle?

To begin with, you can try to increase the displacement of the piston, which will increase the volume by 0.2 liters. Boring is carried out to increase the inner diameter of the sleeve, after which pistons with rings are selected for the updated dimensions.

In addition, the engine is equipped with a crankshaft with shortened connecting rods and increased in lengthshoulders. Only replacing the CPG and KShM will not be enough. Since the volume of liners will increase, an increase in the supply of the fuel-air mixture will be required with improved ventilation of the cylinders. To do this, you will need to bore the inlet and outlet sockets of the cylinder head, change the valves to larger analogues, expand or redo the seats.

Some users completely change the exhaust assembly while increasing the diameter of the outlet pipes and replacing the catalysts with flame arresters. It should be borne in mind that such transformations in the 2123 engine block require reconfiguring the functioning of the fuel supply, since the standard portion will no longer be enough. From this it follows that chip tuning will be needed. The increase in power is on average about 15%, however, fuel consumption also increases.

Other tuning options

One of the improvement options is to improve the cylinders for more efficient operation of the updated piston. The reformation involves boring these elements to a width of 84 mm. Properly done work in this direction will allow the owner to get an increased volume of the Chevrolet Niva 2123 engine up to 1.9 liters. In this case, it will be necessary to additionally change some parts associated with the assembly. Replacing the old carburetor with a new version, as well as installing lightweight connecting rods, will also make it possible to slightly increase the power of the car.

Replacing the valve train

It must be taken into account that the modernization of the Chevrolet Niva power unit will not have a significantimpact in terms of improving vehicle performance. This is due to the fact that all the features of the vehicle are designed for high cross-country parameters, and not for speed performance. Consequently, the money and time spent on chip tuning, replacement of the valve mechanism, updating engines do not always give the desired result.

In order for the modernization of the domestic SUV to bring a visible effect, attention should be focused on improving traction characteristics, which is already one of the advantages of this car. In this direction, you should pay attention to such points:

1. Boring of a regular piston for an increased diameter. This will make it possible to increase the fuel volume of the engine. Just two millimeters of difference will allow you to fit not 1.7, but 1.85 liters of fuel, which is not so little.
2. Improving the piston itself in the power unit will give another 0.2 liters to the volume.
3. Completely replacing the 2123 piston mechanism with cover with an 88 mm version will increase the volume to two liters.

An important point - any attempt to tune the motor by an ignorant person without the participation of a specialist can lead to the opposite effect or failure of the unit.

Conclusion

Despite the fact that the "engine" in question is not far from its predecessor in terms of its technical parameters, it provides quite a lot of interesting and useful transformations, including a well-thought-out cooling system for the Chevrolet Niva 2123 engine. Many users believethat such a simple motor can be filled with low-quality, cheap oil. This is far from true. This approach reduces the life of the motor, especially in terms of cylinder walls. But with regular and proper maintenance, the power unit will last its intended period, and maybe more.