Characteristics of VAZ-2112 engines 16 valves: comparison of 124 and 21120

The VAZ 21124 engine with 16 valves appeared in 2004, by reconstructing and improving the 2112 engine and was mounted on cars produced by the AVTOVAZ concern, models 2111, 2112, 2111.

The updated internal combustion engine received an increased displacement - 1.6 liters. The increased engine volume of the VAZ 21124 was achieved by increasing the distance between the axes of the main and connecting rod journals of the crankshaft by 7.3 mm (it was 30.5 mm, now it is 37.8 mm). Moreover, the increase in volume occurred without changing the diameter of the cylinders; it remained the same - 82 mm.

Thus, the designers' intention was achieved - bringing the environmental characteristics to the European level. Let's consider its description in more detail.

Design features

The main part of the engine, the cylinder block (catalog number 11193-1002011), also differs in size from its predecessor. It is factory painted blue. Its height, the distance from the crankshaft axis to the upper plane, became 197.1 mm, versus 194.8 mm on the 2112 model.

The dimensions of the holes for the block head mounting bolts have changed; they are from the hoist with M10×1.25 threads. The main bearing supports on the 124th engine, from the second to the fifth, are equipped with channels designed to supply oil that cools the piston during operation.

The crankshaft installed is the same as on models 21126 and 11194, with the marking 11183 cast on the sixth counterweight. Due to the crank radius of 37.8 mm, a piston stroke of 75.6 mm was provided. A toothed pulley is installed on the shaft for timing belt drive. The belt is 25.4 mm wide and has 136 teeth, parabolic in shape. Belt service life is 45,000 km.

The pulley is designed to drive additional units using a V-belt. Three types of belts are used, differing in length, depending on the equipment:

• If the drive is only for the generator, the belt length is 742 mm.
• With power steering - 1115 mm.
• With power steering and air conditioning 1125 mm.

The pulley is designed in such a way that it acts as a damper, reducing the torque loads acting on the shaft. Another function is to determine the position of the crankshaft using a sensor and a gear mounted in the damper.

The improvement affected the pistons. Their bottoms are made with valve recesses 5.53 mm deep to avoid the valves hitting the piston bottom when the timing belt breaks.

On previous VAZ 16v models without recesses or with recesses of shallower depth, in such a situation there was a risk of bending the valves, which led to expensive repairs. So, concerns and frequently arising questions about whether the valves bend on this engine have been removed.

Oil scraper and compression rings are made of steel or cast iron. The pistons and connecting rods are connected using floating pins, 22 mm in diameter, 60.5 mm in length, secured with retaining rings. The pins and connecting rods are borrowed from the VAZ 2110 modification.

The block head for the 16 valve LADA 21124 engine has an enlarged docking area for the intake manifold flange. Both camshafts for the exhaust and intake valves, as well as the valves themselves, springs, and hydraulic compensators have also been preserved from the previous modification of the engine.

In order to avoid confusion, the shafts are marked with a digital code. If it ends at 14, then this is the exhaust valve shaft, if at 15, then this is the intake shaft.

Another difference is that there is a raw strip on the intake shaft, next to the first pushrod. By adding hydraulic compensators to the design, the manufacturer eliminated the need to maintain valves in terms of adjustment. But, they are very sensitive to the cleanliness and quality of the lubricant. Low-quality oil will quickly damage parts and must be replaced; such repairs are not provided for the VAZ 124.

The spring-valve group is similar to model 2112. Valves with one spring and rods with a diameter of 7 mm (on eight-valve heads their diameter is 8 mm). Toothed pulleys with marks for setting the valve timing are installed on the camshafts. Compared to model 2112, the marks are shifted relative to each other by 2°.

Description

The VAZ 21124 engine is part of the line of 16-valve power units produced by AvtoVAZ JSC. It is an in-line 4-cylinder unit with overhead camshafts and electric fuel injection (injector).

The gas distribution mechanism is driven by a belt, which needs to be changed after any 45,000 km. With all this, the manufacturer advises inspecting it for damage and eliminating sagging any 15 thousand km of the distance traveled.

The VAZ 21124 engine is assembled on the basis of the highest (197.1 mm) cylinder block modification 11193-1002011, the introduction of which made it possible to increase the piston stroke to 75.6 mm. This led to an increase in the useful cylinder size to 1.6 liters, torque and power of the unit.

The developers of motor 21124 managed to remove a significant defect inherent in almost all motors. If the drive belt breaks, the unit does not bend the valve. This was achieved by equipping the pistons with special holes that prevent contact between the piston and the valve in an emergency.

The introduction of hydraulic pushers made it possible to abandon the need to regulate valve mechanism clearances. True, with all this, the sensitivity of the engine to the quality of engine oil has increased.

The features of the VAZ 21124 engine also include:

• absence of high-voltage wires. Instead, a separate ignition coil was installed on each spark plug;
• the presence of special nozzles designed to cool the piston bottoms. They are pressed into bearing supports.

Tuning

Simple firmware or chip tuning for 124 engines not the technical characteristics . To significantly increase power, it is necessary to modify the engine.

• The simplest and most common tuning of the 21124 engine is the installation of sports camshafts, a direct-flow resonator, an increased throttle - in this way you can increase the power to 120 hp. Installing a lighter piston engine can add some power to this. This, at the same time, will reduce the fuel consumption of the VAZ 21124.
• About 150 hp can be ensured by modification of the cylinder head and installation of camshafts with increased valve opening phases.
• Installing a compressor has approximately the same effect; it is installed on eight-valve and sixteen-valve engines.
• Stable engine operation at any speed is ensured by installing four chokes, one for each cylinder. According to popular experience, the most suitable option is to install an injection system from ToyotaLevin. To do this, a set is assembled from the chokes themselves, an adapter manifold, a zero-resistance filter, injectors, an absolute pressure sensor and a fuel pressure regulator. Due to the fact that the speed exceeds the limit, it is necessary to install lightweight piston and wide-phase camshafts. With this modification, engine power can reach 200 hp. But such modernization sharply reduces the service life of the engine, is fraught with frequent breakdowns and the need to carry out serious repairs of the VAZ 124, due to the fact that the engine easily and often spins up to 9,000 rpm.

An exhaust manifold

This system is designed to improve the release of exhaust gases. People call this system “spider”, and there can be mainly two options: “4-1”, “4-2-1”.

Three types of collectors

It is advisable to install the exhaust system after working with the gas distribution mechanism, pistons, “nulevik” or chip tuning. Single-purpose installation of this system will not bring the desired results.

Malfunctions and repairs

The most common malfunction that VAZ 2110 owners encounter is when the 21124 engine fails. This is expressed in unstable engine operation, interruptions in operation, increased vibration, noise and gasoline consumption. What could be the reasons for this unpleasant phenomenon and what repairs will be required on the VAZ 21124 engine.

If the engine in any VAZ 2110 car is malfunctioning, then, firstly, you need to find out the reason, diagnose the ignition, fuel supply system, gas distribution mechanism, electronics and mechanical parts (pistons and crankshaft) and repair the VAZ 124, even if you do it yourself .

• Ignition - the wires are removed from the spark plugs one by one. If the friction increases when the wire is disconnected, then the cylinder is working. If it still troits, that means the problem lies there. In this case, the spark plug and high-voltage wire are checked. The easiest way is to install new ones, and if the problem is not solved, then the diagnosis must be continued by checking the ignition module. You can also try to replace it with a working one, or test its circuit with a multimeter.
• The cause of interruptions may be poor quality fuel. In this case, you need to change it and also wash the injectors.
• The piston and valve groups are tested together. First, you can disconnect the breather hose. If white smoke comes from the breather, then the problem is hidden in the pistons, or rather in their rings. If there is no smoke, then it is necessary to measure the compression. Reduced compression usually indicates a valve failure. If compression is normal, you can try adjusting the valves. Engine malfunctions can occur due to clamped or, conversely, too loose valves. These cases threaten to carry out the most complex and expensive repairs of the VAZ 21124.
• Interruptions can also occur due to a faulty crankshaft position sensor. It is removed, marking its position, and the resistance of the sensor coil is checked. Normally, it should show a resistance of 550-750 Ohms.

Maintainability

The VAZ-21120 impresses with its simplicity of design and high maintainability. There are no problems finding spare parts. They can be easily found in any specialty store. The only “underwater reef” when purchasing the necessary parts is the high possibility of running into a fake. The Chinese manufacturer is especially famous for counterfeit spare parts.

The cast iron cylinder block allows for major repairs of any complexity. At the same time, you can restore the engine in a garage. Car service centers are also happy to take on repair work.

In general, the internal combustion engine of the VAZ-21120 was not entirely successful, but the ease of maintenance and repair largely compensates for this shortcoming. It is important to remember that the service life of the latter depends on the attitude of the car owner towards the engine.

Technical characteristics of the VAZ 21124 1.6 16v engine

Official fuel consumption rate for VAZ 2112

The gasoline consumption declared by the plant (in l/100 km) is presented in the table.

The consumption rates and power of power plants published by the VAZ manufacturer depend on the year of manufacture of the car (the discrepancy does not exceed 0.1-0.2 liters). The output of early 21120 engines was 94 hp. s., later due to modernization the parameter dropped to 92 or 91 liters. With. A similar situation arises with the 2111 engines; early models had a power of 79 hp. With.

Regardless of the volume and year of manufacture, the engines are designed to use gasoline with an octane rating of at least 95 units.

Design features of the Lada 21124 16 valve engine

First of all, the internal combustion engine differs from the previous 1.5‑liter VAZ 2112 in a higher block. And an increase in the piston stroke by 4.6 mm made it possible to increase the engine displacement to 1.6 liters. Thanks to the holes in the piston bottoms, this power unit does not bend if the valve belt breaks.

This motor has received a number of modern design solutions. In addition to the previously used hydraulic compensators, it was the first to use individual ignition coils. And the catalytic collector allowed it to comply with strict environmental standards of EURO 3 (later EURO 4).

Popular blogger Evgeny Travnikov compares the characteristics of the 24th and 26th internal combustion engines.

The magazine Behind the Wheel wrote about the new AvtoVAZ engines 21114 and 21124

What cars was it used in?

Only three VAZ models using the 2112 engine left the assembly line of the manufacturer's plant:

• 21103 – sedan;
• 21113 – station wagon;
• 2112 – sedan, GLI luxury and Standard versions.

VAZ-2112

Since the characteristics of the engine 21124 and internal combustion engine 21128 are not too different from the original, it was mounted on the same VAZ Lada. The modification of the 21126 engine was equipped exclusively with Prioras.

Reviews of engine 21124 its pros and cons

This power unit at one time replaced the 1.5-liter VAZ 2112 engine and, in theory, should have become more powerful than its predecessor, but in reality it turned out to be even a little weaker due to the catalytic converter. The owners were upset that with the transition to a larger volume, the power did not increase.

Great progress was the emergence of individual coils; there were much fewer failures in the ignition system. In all other respects, this is a typical VAZ engine of its time.

How to regulate fuel consumption on a VAZ 2112

We have already considered the factors and reasons that affect the use of gasoline in the VAZ 2112. Now you need to know what needs to be done to prevent gasoline consumption from increasing or how to reduce it. The main points to prevent increased fuel consumption are:

• constantly change the fuel filter;
• monitor the operation of the engine system;
• change candles that become black and oily over the years - non-functional;
• watch the condition of the fuel pump mesh so that it does not fall into the glass;
• The catalyst and exhaust must function.

By adhering to these rules, you can save on fuel costs for the VAZ 2112 by 7.5 liters.

Basic rules for reducing gasoline consumption

An attentive driver must constantly monitor all indicators of the car. Monitor the oil level, monitor engine operation, and monitor all filters and strainers. If you bought a car that has already traveled a certain number of kilometers and its fuel consumption exceeds 10 liters, then you should immediately take the following actions:

• change oil (adjust level);
• replace the filter;
• check the quality of gasoline;
• observe the performance of the fuel pump;
• regulate driving maneuverability.

If all this does not lead to the desired result, then you need to do computer diagnostics of the car.

Maintenance regulations for internal combustion engine VAZ 21124

The service book recommends that you undergo zero maintenance at a mileage of 2,500 km and then service the engine every 15,000 km, but on the forums they advise reducing this interval to 10,000 km.