Engine VAZ-21124 - 16-valve representativeline of power units produced by JSC AvtoVAZ since 2004. In fact, this model was the result of another improvement in the VAZ-2112 engine and was installed on production cars: VAZ-21104, 21114, 21123 "Coupe", 21124, 211440-24. Later it was used to create more powerful plants: VAZ-21126 and VAZ-21128 engines of the production enterprise Super-auto.
In general, the power unit remained quite traditional, i.e. four-stroke, with one row of cylinders, an upper camshaft arrangement and a distributed fuel injection (injector).
First of all, the updated cylinder blockdiffers from its predecessor by its height (the distance between the axis of rotation of the crankshaft and the highest point of the block): in the VAZ-2112 it was 194.8 mm, in 21124 it was 197.1 mm. Due to this, the volume of cylinders (up to 1.6 cm3).
For fixing the head, the diameters of the bolt holes have been changed, now their thread must correspond to the dimensions M10 x 1.25.
Another feature of the improved blockconsists of special nozzles built into the bearings of the main bearings (2, 3, 4 and 5). During the operation of the engine, oil is supplied through them, which cool the piston head.
The engine 21124 has crankshaft, crankwhich (R = 37.8 mm) provides an increased stroke of the piston. The same crankshaft with the marking "11183", cast on its sixth counterweight, is installed on the power units 21126 and 11194.
The pulley for the operation of the gas-distributing mechanism is marked "2110-1005030". And the transverse profile of its teeth is a parabolic shape.
A damper through which, through a poly-belt drive generator, as well as additional units not provided for in the basic configuration, thanks to the special arrangement of its pulley, the torsional vibrations arising on the shaft are significantly suppressed. And the master disk entering the damper construction allows the special sensor to read the crank angle.
For the functioning of the timing mechanism in the constructionThe 16-valve engine 21124 uses a 25.4 mm wide belt that has 136 parabolic teeth and is marked as "2112-1006040". The resource before a possible replacement is 45 thousand km.
If no additionalhinged aggregates, namely the SUR pump and the air conditioning compressor, then the belt with the marking "2110-3701720 6 PK 742" (working length - 742 mm) is used in the generator drive.
If the GUR pump is installed, a belt of a different size - 1115 mm - is installed to drive the generator. Its marking is "2110-1041020 6 PK 1115".
The model with the compressor for the air conditioner has an even longer generator belt - 1125 mm, with the marking - "2110-8114096 6 PK 1125".
The renewed engine also received new pistons inthe bottom of which are provided with valve holes: each piston is made with four grooves 5.53 mm deep, which are designed to prevent bends (breakage) of the valves in the event of a break in the timing belt.
Earlier, if this happened, the connection was lostvalves with a cranked shaft, their movement ceased, but the shaft, carried by the flywheel, continued to rotate by inertia, and accordingly, the pistons also moved. As a result, they collided with the valves. The result is that they bent, broke or even pierced the bottom of the piston.
The dimensions of the piston rings, which can be both cast iron and steel, remained the same: 82 mm.
The piston pin has a floating fit, and its axial fixation is provided by the locking rings. The length of the finger is 60.5 mm, and its diameter is 22 mm.
The connecting rods of the engine 21124 are interchangeable with the connecting rods of model 2112.
The six-valve cylinder head differs from that installed on 2112, only the increased surface area allocated for the installation of the intake manifold flanges.
To control the valves on the top of the cylinder headtwo camshafts are installed: one for the intake group, one for the exhaust manifold. To distinguish them, the manufacturer puts stamps that are on the neck of the shafts behind the second cam. If the last digit is 14, then the shaft is exhaust, if 15, then, respectively, the intake. In addition, the inlet camshaft next to the first cam has an untreated metal band.
Since the head is provided with hydropushers, this saves the car owner from adjusting the thermal gaps between the cams and the valves.
However, this convenience forces the drivercarefully monitor the cleanliness and quality of the oil, since the mechanism of the hydro tappet is very sensitive to foreign impurities in the lubricant, the presence of which can lead to its failure, and it is not subject to repair, only a complete replacement.
Valves of the valves of the sixteen-valve motor have a diameter of 7 mm, in the eight-valve they are 1 mm larger.
Как уже говорилось выше, распредвалы вращаются thanks to the belt drive coming from the crankshaft. The marks for correct setting of the working phases of the motor on pulleys 21124 are offset by two degrees relative to the same marks applied to the pulleys of the power unit 2112.
Toothed pulleys of an inlet and final shaftdiffer from each other and are marked by their marking: intake - "21124-1006019", graduation - "21124-100606020". In addition, the intake pulley has a circle near the hub and a curtain on the inside, at the outlet there is no such curtain.
The design of the intake system used plastic pipe, which simultaneously performs the functions and the intake manifold and receiver.
As part of the release of constructorsengine used katkollektor - site, previously not used in models of the WHA and is a neutralizer, constituting one with the receiving tube.
First of all, it should be noted that the VAZ-21124a new type of fuel rail is used, made of stainless alloy and different from the one on the VAZ-2112, primarily because there is no drain line in the fuel system. The required gasoline pressure in the line is maintained by a special valve installed in the fuel pump.
As for the ignition system, it is special inIt is that high-voltage wires were excluded from its design. The fact is that on the engine 21124 each candle got a separate ignition coil.
Coils are fixed directly on the candles and plus have an additional attachment to the cylinder head cover. Thanks to this innovation, the reliability and efficiency of the ignition system has increased significantly.
Many car owners vazovskih models of carsknow that the engine's operating temperature is considered to be 90 degrees Celsius. However, with the advent of the 16-valve engine series VAZ-2112, this rule was not so unambiguous. The fact is that with the introduction of environmental requirements, the engines were modernized, and in connection with this manufacturer the temperature range was changed for them. Now engine temperature fluctuations in the range of 87–103 degrees are considered normal.
In conclusion, it should be mentioned that the oilengine 21124 must comply with the viscosity of 5w30, 5w40, 10w-40 or 15w-40. The dry engine includes 3.5 liters of lubricating fluid, but after draining about 800 grams remains in the crankcase, respectively, when re-replacing the fill volume will decrease.
