VAZ-21074 injector: the last of the "classics"
Content
The latest version of the Zhiguli in the classic version was the VAZ-21074, which later became one of the most popular Soviet and then Russian cars. The VAZ-21074 injector was greeted by numerous admirers of the "seventh" model with undisguised enthusiasm, and, by and large, the car as a whole lived up to the expectations of motorists. At the time of release, the car was considered the fastest rear-wheel drive sedan of the models previously released by the Volga Automobile Plant. In 2006, in order to comply with environmental safety conditions and improve technical parameters, an injection engine was installed on the VAZ-21074.
Overview of VAZ-21074 injector models
The start of serial production of VAZ-21074 cars dates back to 1982, when the first copies of this model rolled off the assembly line of the Volga Automobile Plant. At that time, the car was equipped with a carburetor power system: the injector on the VAZ-21074 appeared only in 2006. The advantages of the injection method of fuel supply are no longer a revelation to anyone, and after this system was implemented on the VAZ-21074:
- the engine started to start better in conditions of negative temperatures, without requiring a long warm-up;
- at idle, the engine began to work more smoothly and quietly;
- reduced fuel consumption.
The disadvantages of the VAZ-21074 include:
- the low location of the exhaust pipe catalyst, which increases the risk of damage to this expensive part;
- the inaccessibility of some parts and sensors, which was the result of the fact that the body of the old type was not designed for the injection system - in the carburetor version there is much more space under the hood;
- low level of sound insulation, which reduces the degree of comfort of the car.
The presence of a computer control unit allows you to respond in a timely manner to the occurrence of malfunctions, since a breakdown signal is immediately sent to the instrument panel. The control scheme of the engine and its systems used in the VAZ-21074 allows you to control the composition of the fuel mixture, turn the fuel pump on and off using electronics, and continuously monitor all components and mechanisms.
The control scheme includes:
- Motor diagnostic block;
- Tachometer;
- Lamp for monitoring malfunctions of the control system;
- Throttle sensor;
- Throttle valve;
- Radiator cooling fan;
- Fan relay;
- Control block;
- Ignition coil;
- Speed sensor;
- Ignition section;
- Temperature sensor;
- Crankshaft sensor;
- Fuel pump relay;
- Fuel tank;
- Gasoline pump;
- bypass valve;
- Safety valve;
- Gravity valve;
- Fuel filter;
- Adsorber purge valve;
- Reception pipe;
- Oxygen sensor;
- Battery;
- Egnition lock;
- Main relay;
- Nozzle;
- Fuel pressure control;
- Idling regulator;
- Air filter;
- Air flow sensor.
The identification plate of the VAZ-21074 car can be found on the bottom shelf of the air inlet box, which is located under the hood near the windshield, closer to the passenger seat. Next to the plate (1) is stamped VIN (2) - machine identification number.
Passport data on the plate are:
- Part number;
- Manufacturing plant;
- Indication of conformity and type approval number of the vehicle;
- An identification number;
- Model of the power unit;
- The maximum allowable force on the front axle;
- Maximum permissible load on the rear axle;
- Version of execution and complete set;
- The maximum permitted weight of the vehicle;
- The maximum permitted weight with a trailer.
The alphanumeric characters on the VIN number mean:
- the first three digits are the manufacturer's code (in accordance with international standards);
- the next 6 digits are the VAZ model;
- Latin letter (or number) — year of manufacture of the model;
- the last 7 digits are the body number.
The VIN number can also be seen in the trunk on the left rear wheel arch connector.
Proezdil I was on it for two years, and during that time I changed only consumables and one ball. But then one winter there was an emergency. I went to visit the village, and on the street there was an incredible dubak, somewhere around -35. While sitting at the table, a short circuit occurred and the wiring began to melt. It's good that someone looked out the window and blew the alarm, the incident was liquidated with snow and hands. The car stopped being on the move, and a tow truck brought it to the house. Having examined all the consequences in the garage, I thought that not everything was as scary as it seemed at first glance, though the wiring, all sensors and some parts had to be disposed of. Well, in short, I decided to restore, called a friend who was famous among his friends as a good mechanic.
After a short search for spare parts, it became clear that the injector would be problematic to restore, since the required components are not all available, and the price tag for them is hoo. As a result, they threw out the idea to fix the injector, deciding to make a carburetor.
Specifications VAZ-21074 injector
The most significant feature of the VAZ-80 model that appeared in the early 21074s, which distinguished it from other modifications of the "seven" - equipment with a 1,6-liter VAZ-2106 engine, which initially worked only on gasoline with an octane rating of 93 or higher. Subsequently, the compression ratio was lowered, which allowed the use of lower grades of fuel.
Table: technical characteristics of the VAZ-21074
| Parameter | Value |
| Engine power, l with. | 75 |
| Engine volume, l | 1,6 |
| Torque, Nm / rev. in min | 3750 |
| Number of cylinders | 4 |
| Cylinder arrangement | inline |
| Acceleration time to a speed of 100 km/h, seconds | 15 |
| Maximum speed km / h | 150 |
| Fuel consumption (city/highway/mixed mode), l/100 km | 9,7/7,3/8,5 |
| Transmission | 5MKPP |
| Front suspension | independent multi-link |
| Rear suspension | dependent |
| Front brakes | disk |
| Rear brakes | drum |
| Tire size | 175 / 65 / R13 |
| Drive size | 5Jx13 |
| Body type | sedan |
| Length m | 4,145 |
| Width, m | 1,62 |
| Height, m | 1,446 |
| Wheelbase, m | 2,424 |
| Ground clearance, cm | 17 |
| Front track, m | 1,365 |
| Rear track, m | 1,321 |
| Curb weight, t | 1,06 |
| Full weight, t | 1,46 |
| Number of doors | 4 |
| Number of seats | 5 |
| Drive unit | rear |
The dynamic performance of the VAZ-21074 is inferior to most budget foreign cars, but the domestic motorist appreciates the "seven" for other qualities: spare parts for a car are inexpensive and publicly available, even a novice driver can repair almost any unit and unit on his own. In addition, the machine is extremely unpretentious and adapted for operation in Russian conditions.
Video: the owner of the VAZ-21074 injector shares his impressions about the car
The engine from the VAZ-2106 was installed on the VAZ-21074 without changes: among other things, the camshaft chain drive was left, which, compared to the belt drive (used in the VAZ-2105), is more durable and reliable, although more noisy. There are two valves for each of the four cylinders.
Compared to previous models, the gearbox has been noticeably improved, which has a fifth gear with a gear ratio of 0,819. The gear ratios of all other speeds have been reduced in relation to their predecessors, as a result of which the gearbox works more “softly”. Borrowed from the "six" rear axle gearbox is equipped with a self-locking differential with 22 splines.
The DAAZ 2107-1107010-20 carburetor, which was installed on the VAZ-21074 until 2006, has established itself as a fairly reliable mechanism, which, however, was very susceptible to fuel quality. The appearance of the injector added to the attractiveness of the model, thanks to new features: now it was possible, by reprogramming the control unit, to change the engine parameters - to make it more economical or vice versa, powerful and torquey.
The front pair of wheels has an independent suspension, the rear one has a rigid beam, thanks to which the car is quite stable when cornering. The fuel tank holds 39 liters and allows you to travel 400 km without refueling. In addition to the fuel tank, the VAZ-21074 is equipped with a number of other filling tanks, including:
- cooling system, including a radiator, an engine cooling jacket, an expansion tank. The system is filled with a coolant volume of 9,85 liters;
- housing 5MKPP - 1,35 l of TAD-17 oil;
- engine crankcase - 3,75 liters of engine oil;
- rear axle — 1,3 l of TAD-17 oil;
- steering column housing - 215 ml of hypoid oil;
- windshield washer - 2 liters of liquid;
- hydraulic clutch - 200 ml of brake fluid.
For anti-corrosion coating of the bottom, polyvinyl chloride plastisol D-11A is used. With a top speed of 150 km / h, the car accelerates to "hundreds" in 15 seconds. From the closest predecessor - the "five" - VAZ-21074 received a brake system and a similar appearance. These two models are different:
- trunk and hood shapes;
- radiator grilles;
- rear lights;
- chrome bumpers.
Salon VAZ-21074
The design of all modifications of the VAZ-2107 family (including the VAZ-21074 injector) provides for the layout of components and assemblies according to the so-called classical scheme, when the rear wheels are driven and the engine is maximally shifted forward, thereby ensuring optimal weight distribution along the axles and, as a result, improving vehicle stability. Thanks to this arrangement of the power unit, the interior turned out to be quite spacious and turned out to be located inside the wheelbase, i.e., in the zone of the best smoothness, which could not but affect the comfort of the car.
Interior trim is made of high-quality non-reflective materials. The floor is covered with polypropylene-based non-woven mats. The body pillars and doors are upholstered in semi-rigid plastic, covered on the front side with capro-velour, velutin is used for seat upholstery. The ceiling is finished with a PVC film with a duplicated foam pad, glued to a plastic molded base. Due to the use of various mastics, layered bituminous gaskets and felt inserts:
- heat and noise insulation of the cabin is achieved;
- vibration is eliminated;
- Metal components are protected from corrosion.
Video: how to improve the VAZ-21074 injector
The front seats feature reclining reclining backrests that can be moved on sleds for the most comfortable seating position. The rear seats are fixed.
The instrument panel VAZ-21074 consists of:
- Voltmeter;
- speedometer;
- Odometer;
- Tachometer;
- coolant temperature gauge;
- Econometer;
- Block of control lamps;
- Daily mileage indicator;
- Fuel level control lamps;
- Fuel gauge.
When I sat down and drove off, at first I was completely confused, before that I drove foreign cars, but here the steering wheel is twisted tightly to press the pedal, probably the strength of an elephant is needed. I arrived, immediately drove a hundred, it turned out that the oil and filters in it were not changed at all, I changed it. Of course, it was difficult to ride in the first place, although the engine and gearbox suited me initially. Then it happened that I had to go far, I almost turned gray on this trip. After 80 km, I no longer felt my back, however, I also almost became deaf from the endless roar of the engine, and when I refueled at an unknown gas station, she almost got up at all. I arrived with sin in half, went to clean the fuel system, but looked, they say the car is in good condition, it’s just that the rear-wheel drive was not modernized from the Soviet Union. They conjured something there, reflashed, shoved the unimaginable, but the fact dug up: the consumption decreased several times, and the power was added to the machine. I gave 6 pieces for this repair, there was only one more repair, when the windshield was smashed with a stone, and he bounced off and left a dent on the hood, gave another thousand. In general, when I got used to it, everything became normal. Aut, I think it justifies its money, the car is reliable, and there are no problems with spare parts. Most importantly, you need to keep an eye on the car, change everything on time and not tighten it even with a burnt out light bulb, otherwise the consequences may result in no one knows what.
The gearshift scheme of a 5-speed gearbox differs from a 4-speed one only in that a fifth speed has been added, to turn it on, you need to move the lever to the right to the end and forward.
The use of an injection fuel supply scheme in a VAZ-21074 vehicle adds manufacturability to the vehicle, allows you to save gasoline and control the amount of mixture supplied to the engine using electronics. Despite the fact that the model has not been produced since 2012, the VAZ-21074 continues to be in demand in the secondary market, thanks to its more than affordable price, ease of maintenance, and adaptation to Russian roads. The appearance of the car is quite easy to tune, due to which the car can be given exclusivity, and its design can be made more relevant.
