VAZ-2104 Tank volume, trunk Load capacity Fuel consumption
Since the end of 1984, this five-seater station wagon with a classic layout, belonging to the second generation of the “classics,” replaced the “first” generation station wagon, the VAZ-2102, on the assembly line, but they were produced together for another year. The Zhiguli station wagon VAZ-2104 remains the most popular domestic small utility vehicle.
Expert advice
After completing the procedure for adjusting the VAZ-2105 carburetor device, experienced auto mechanics recommend paying attention to the following critical points:
- Valve location - is in the retracted position, with the idle speed jet touching the seat in the carburetor body.
- Lubricating the rubber seal with special motor oil.
- The location of the air damper intended for cold passage is in a vertical plane, while the suction handle is lowered.
- The condition of the solenoid valve - the presence of damage and malfunctions is checked as follows:
- turn on the ignition;
- remove and put the connector on the valve;
- listen to the sounds coming from the solenoid valve.
VAZ-2104 Zhiguli - video review
The car enjoys a strong reputation as a family car and a delivery van for the city “tent trade”, so, perhaps, the fashion for it will never go away. The following factors played an important role in this: availability of spare parts and service, decent cargo volume in the cabin, relatively modern design (albeit obsolete, but for a station wagon this is not the biggest drawback) and relatively low cost. In the basic configuration, the interior trim is quite ascetic, like that of the basic VAZ-2105 sedan.
At the same time, they produced a more powerful modification of the VAZ-21043 with a VAZ-2103 engine with a displacement of 1.5 liters (carburetor 2107) and a five-speed manual transmission VAZ-21074, completely unified with a four-speed gearbox, which makes the car more dynamic and pleasant to drive. Some cars, starting from the 90s, are equipped with a VAZ-2107 type dashboard. The cost in this case is slightly higher. Station wagons of the VAZ-21047 modification, equipped with a radiator trim, a five-speed gearbox, electrical equipment and an interior with bucket front seats from the VAZ-2107, are valued even more expensive on the market. In fact, this option can be considered a modification of the “luxury” VAZ-2107 with a station wagon body.
The modernizations that affected the VAZ-2105 or VAZ-2106 models left the “four-station wagon” aside, but nevertheless, some differences in the electrical and power systems are possible on the 1984, 1988 and 1990 models. The folding rear row of seats allows you to increase the volume of the luggage compartment from 375 to 1340 liters, and then you can even transport a two-chamber refrigerator in a package. But the back of the rear seat folds only entirely, because of this it is impossible to transport long cargo and one or two passengers in the back seat at the same time.
The body design allows you to place a long trunk on the roof, but it is not recommended to overload it: the calculated rigidity of the station wagon body is significantly lower than that of the VAZ-2105 and VAZ-2107 sedans (therefore, there are stampings on the roof panel to increase rigidity). The total load of the car should not exceed the permissible 455 kg, otherwise during movement, due to dynamic loads, the body and load-bearing parts will deform and disrupt the suspension geometry. You should also not get carried away with towing heavy trailers - the body may “drive”. By the way, because of this, you should not overpay for the presence of a tow bar on a used vehicle.
Therefore, when buying a VAZ station wagon from two or three years ago, test the car on the move and carefully (it is advisable to invite a specialist) examine the mounting locations of the suspension shock absorbers, levers and power elements of the chassis. The lifting rear door on cars until 1994 was equipped with windshield wipers only in export versions, among which recently versions of the VAZ-21044 (1.7-liter engine) equipped with a central injection system instead of a carburetor and a catalytic converter have become common. based on the station wagon, I assembled a VAZ-21043-33 pickup truck with a carrying capacity of 450 kg in small batches.
Troubleshooting the fuel system of the Lada 2107 with your own hands, Repair instructions for the power system of the Lada 2105, troubleshooting and inspection of the batteries of the VAZ 2104, VAZ 2105, VAZ 2107. Maintenance of the Lada 2104 engine. Repair instructions for the engine and systems: power supply, cooling and lubrication of the Lada 2105. Inspection and repair of the crankshaft and camshaft, piston group of Lada 2107. Instructions for disassembling and assembling the cylinder head and block.
Diagram of the main dosing system of the carburetor VAZ 2104, VAZ 2105, VAZ 2107 and econostat (the econostat spray is located in the second chamber of the carburetor. In the diagram it is conventionally shown in the first chamber): 1 - emulsion jet of the econostat; 2 — emulsion channel of the econostat; 3 — air jet of the main dosing system; 4 — econostat air jet; 5 — econostat fuel jet; 6 — needle valve; 7 — float axis; 8 — locking needle ball; 9 — float; 10 - float chamber; 11 — main fuel jet; 12 - emulsion well; 13 - emulsion tube; 14 — axis of the throttle valve of the first chamber; 15 — spool groove; 16 — spool; 17 — large diffuser; 18 — small diffuser; 19 – sprayer
Diagram of the carburetor idle system for VAZ 2104, VAZ 2105, VAZ 2107: 1 - throttle body; 2 — throttle valve of the first chamber; 3 - holes for transition modes; 4 - adjustable hole; 5 — air supply channel; 6 – economizer needle; 7 — forced idle economizer housing; 8 — economizer cover; 9 — hose connecting the economizer to the pneumatic valve; 10 — adjusting screw for the amount of mixture; 11 — adjusting screw for the composition (quality) of the mixture; 12 — emulsion channel of the idle system; 13 — carburetor body cover; 14 — air damper; 15 — air jet of the idle system; 16 — fuel jet of the idle system; 17 — fuel channel of the idle system; 18 - emulsion well; 19 — pneumatic valve; 20 - hose going to the inlet pipe
Diagram of the drive of the throttle valves of the Lada classic carburetor: 1 - pneumatic drive nozzle located in the diffuser of the first chamber; 2 — throttle valve drive lever; 3 - lever rigidly connected to the axis of the throttle valve of the first chamber; 4 - lever limiting the opening of the throttle valve of the second chamber; 5 — pneumatic drive jet located in the diffuser of the second chamber; 6 - lever connected to lever 9 through a spring; 7 — axis of the throttle valve of the second chamber; 8 — pneumatic drive rod; 9 — throttle control lever of the second chamber; 10 — channel for supplying vacuum to the pneumatic drive; 11 — rod bushing; 12 — pneumatic drive of the throttle valve of the second chamber
Diagram of the carburetor starting device for VAZ 2104, VAZ 2105, VAZ 2107: 1 - choke control lever; 2 – air damper; 3 — air pipe of the first chamber; 4 - traction; 5 — starting rod; 6 - diaphragm; 7 - adjusting screw; 8 - cavity communicating with the throttle space; 9 — telescopic rod; 10 — throttle valve drive lever; 11 - sector (antenna); 12 — axis of the throttle valve of the first chamber; 13 — lever on the axis of the throttle valve of the first chamber; 14 - lever connected to the air damper
Diagram of the accelerator pump of the carburetor VAZ 2104: 1 - screw valve; 2 - spray; 3 - fuel channel; 4 - bypass jet; 5 - float chamber; 6 — accelerator pump drive sector; 7 — drive lever; 8 — return spring; 9 — diaphragm cup; 10 — pump diaphragm; 11 — inlet ball valve; 12 — pump vapor chamber
The VAZ-2107 car is equipped with an emulsion-type carburetor, two-chamber, with a falling flow. It has a balanced float chamber, two main metering systems, an enrichment device (econostat) with a pneumatic drive, a crankcase gas suction system behind the throttle valve, a pipe for supplying vacuum to the vacuum ignition timing regulator of the ignition distributor, an autonomous idle system with an electronically controlled forced idle economizer by engine crankshaft rotation speed. The throttle valve of the first chamber is opened from the carburetor control pedal inside the car, and the throttle valve of the second chamber is opened from a pneumatic drive. The choke has a diaphragm trigger for starting a cold engine. A mechanically driven diaphragm-type accelerator pump supplies fuel to the first chamber. The carburetor is mounted on four studs in the intake manifold. Carburetor calibration data.
Adjusting the engine idle speed
NOTE: Blue bushings are installed at the factory, and red bushings are installed at service stations.
Screws for adjusting the idle speed system of the VAZ 2105 carburetor: 1 - mixture quantity screw; 2 - mixture quality screw
The idle speed adjustment of the VAZ 2104, VAZ 2105, and VAZ 2107 engines is carried out by screw 2, which determines the composition of the mixture, and screw 1, which controls the amount of the mixture. To ensure that the car owner does not violate the factory settings, restrictive plastic bushings are pressed onto the screws, allowing the screws to be turned only half a turn. If it is not possible to adjust the CO content in the exhaust gases with the bushings, then by unscrewing the screws, break the heads of the bushings, unscrew the screws, remove the bushings from them and screw the screws back into the carburetor. The idle speed adjustment of the VAZ 2107 is carried out on a warm engine (coolant temperature 90–95°C and oil temperature 75–90°C) with adjusted clearances in the gas distribution mechanism and with a correctly adjusted ignition timing.
Carry out the adjustment in the following order: - use screw 1 to set the crankshaft rotation speed to 820–900 min-1 according to the stand tachometer, - use screw 2 to achieve the concentration* of CO in the exhaust gases within 0.5–1.2% at this position of screw 1; — use screw 1 to restore the crankshaft speed to 820–900 min-1, — if necessary, use screw 2 to restore the CO concentration to 0.5–1.2%;
Installation of restrictive bushings on the screws for adjusting the carburetor idle speed system: a - on the mixture quantity screw; b - on the mixture quality screw
— press the VAZ 2105 restrictive plastic bushings onto the screws, orienting the splines of the bushings relative to the mounting lugs.
Setting the fuel level in the float chamber
Setting the fuel level in the carburetor float chamber: 1 - carburetor cover; 2 — needle valve seat; 3 - emphasis; 4 - needle valve; 5 — locking needle ball; 6 — valve needle pull-out fork; 7 — float bracket; 8 - tongue; 9 — float; 10 - gasket
The fuel level required for normal operation of the VAZ 2107 carburetor is ensured by the correct installation of serviceable elements of the shut-off device. The distance between the float and gasket 10 adjacent to the VAZ 2104 carburetor cover (size A) should be 6.5 ± 0.25 mm; this size is adjusted by bending tongue 8. In this case, the supporting surface of the tongue must be perpendicular to the axis of the needle valve and must not have nicks or dents. Check with caliber 67.8151.9505. Hold the carburetor cover vertically so that the float tongue 8 lightly touches the ball 5 of the needle valve 4 without recessing it. Adjust the value of 8±0.25 mm of the maximum stroke of the float by bending the stop 3. The pull-out fork 6 of the valve needle should not interfere with the free movement of the float. When installing the carburetor cover, check that the float does not touch the walls of the float chamber.
NOTE Always check the float installation when replacing a float or needle valve; in the latter case, the valve gasket must also be replaced.
