The engine power of a car like the VAZ 2114 may seem insufficient for many car enthusiasts. However, this can be fixed. Let's figure out how to convert an 8-valve engine to a 16-valve in a VAZ 2114
If you install a cylinder head with 16 valves, the car's power can exceed all expectations. The reason for this is that the engine cylinders with a similar block head can be filled with a special air-fuel mixture.
As a result, the power of the power unit increases significantly. It is important to note that this is an absolutely safe way to increase the “strength” of your car. So how to convert an 8 valve engine to a 16 valve VAZ 2114?
The question also arises about the difference in power of cars. For example, the power of a car whose engine has a volume of 1.5 liters and 77 horsepower can be significantly improved. If you replace the 8-valve head with a 16-valve one, it will increase to 90 “horses”!
This is quite a big difference, so you should figure out what needs to be done (and in what order) to improve your own car.
16 valve head
Features of engine disassembly
The first thing to do is to disassemble the engine as carefully as possible. This element of the car is the most valuable, so you need to disassemble the engine with extreme caution. It is best to carefully study the instructions and watch videos on the Internet about how craftsmen cope with this task, and only after that do the disassembly yourself.
Under the valve cover you can find many unpleasant defects, including the poor condition of the roller. The cylinder head may also not look its best, and the bushings may be so worn that many are surprised that they still work.
All this means that after the engine is disassembled, a lot of faults or worn parts can be found. It is best to replace each of them. This will increase the reliability of the car and will allow you not to worry that the increased power of the VAZ could become a fatal factor and lead to breakdown in the near future.
It is best to install bronze bushings. They are highly reliable and quite durable.
Why install a new power unit?
Installing a new engine can be useful for those motorists who want to improve their outdated car. Many domestic car enthusiasts know that the “nine” has pretty good driving characteristics, requires little gasoline and is generally not as demanding to maintain as foreign cars, which is why it is often tuned. Replacing an engine from an 8 cl to a more advanced model has its advantages:
- Increased power.
- Improved driving characteristics at high speeds.
- Efficient use of fuel due to the injection system.
- More stable operation of the power unit.
- No constant valve adjustment required.
But there are also disadvantages:
- You need a lot of parts and tools to replace them in your garage.
- At low speeds the 16 cl engine is slightly worse than its 8 valve counterpart.
There are two replacement options here:
- Installation of the entire engine from the 2112 model. In this case, not many parts will need to be replaced, but the cost of the entire engine may discourage this idea.
- Modification of the cylinder head for new components. This is a more economical, but very labor-intensive process.
Installation of a 16 valve head on a VAZ 2114
In order to perform this simple operation, the engine must be disassembled. It is worth warning that many parts will have to be replaced.
These include:
- antifreeze tube;
- oil pump;
- oil sump;
- various sensors;
- crankshaft and much more.
Despite the impressive list, the method described below will really help make the car even more powerful than before.
Reworking the VAZ 2114 engine
Description of the VAZ 2115 injector, all its pros and cons
The comfortable VAZ 2115 car is the founder of a popular family of domestic cars codenamed Samara-2. Attractive exterior design and extensive technical capabilities contributed to the growth of sales of the VAZ 2115 in the Russian domestic market. Without stopping at the achieved success, the manufacturer modernized the car several times, improving the functional and technical equipment of the VAZ 2115.
Conversion of an 8 valve engine into a 16 valve VAZ 2114
During the process of improving the engine, it is necessary to modify the bolts. They are used to secure the 16 valve head. To modernize a VAZ engine, there is no need to change the cylinder block, but the head still needs to be changed. In order for each bolt to fit securely into the head mounting hole, it should be adjusted not only in diameter, but also in length.
Important information. The holes that can be found in the gasket also need some work. They should perfectly match the size of the bolts. If this is not done, the level of engine reliability will decrease significantly.
After this you should change:
- first the pistons;
Piston VAZ 2114
- and then the connecting rods.
Connecting rods VAZ 2114
This must be done while assembling the cylinders.
Now it’s time to refine and adjust the wiring.
It is important to see the difference in the structure of 16 valve pistons from 8 valve pistons. In addition, the location of the sensors also differs. This means that it may be necessary to extend the wiring.
After the engine is assembled, the wiring needs to be finalized. If the car owner would not like to incur extra financial expenses, then he needs to leave the ignition module, and then connect the module using high-voltage wires. This is the easiest way to save money, so don't ignore it.
What to put?
Indeed, the most important issue among VAZ 2109 owners is the range of engines that may be under the hood of their car.
Let's look at several popular solutions that are most often found among those who decide to change the engine on their VAZ 2109.
| Option | Peculiarities |
| 16-valve cylinder head | Gas is a cheaper alternative to gasoline, which will allow you to save big in the future at gas stations. This replacement is called the easiest. But you should take into account the fact that such a replacement will pay off only if the car is used frequently, and you will have a gas cylinder in the trunk. Such work can only be done by specialists with appropriate qualifications and permits. |
| VAZ injector 1.5 liters | A good alternative that will allow you to extract more power from your improved car. The injector is more powerful, it requires less fuel, and provides better dynamics. But in practice, changing engines from VAZ to VAZ is not the best solution, since there are many options among more reliable, powerful imported cars |
| Engines from Priora and VAZ 2112 | Not bad domestic options that will easily fit into the space for the engine of your nine. Good output, excellent opportunity to transfer not only the engine, but also the gearbox itself |
| 1.5 liter engine from Honda Civic | Here we are talking about 1.5-liter engines with a capacity of 92 horsepower of the 1991-1995 model. Injection engines of that generation perfectly fit the dimensions of the engine compartment of the VAZ 2109 and have good technical characteristics. A kind of improved variation of the previous version |
| Engines from Opel | Vectra engines of 1.4, 1.6 and 1.8 liters have proven themselves well. The engines, although old, are playful, quite powerful, and relatively economical. Their main advantage is their affordable price with good build quality. If you find a decent German engine of any of the presented volumes, your VAZ 2109 will perform significantly better compared to the factory engine |
| Motors from Mitsubishi Lancer | 1.5-liter injection engines with a power of up to 100 horsepower are to the taste of many. Good dynamics, good assembly, pleasant economy. Finding such a motor is not very easy, but there shouldn’t be any big problems either. |
| An attractive replacement option that allows you to get a high-spirited, interesting, reliable Korean engine. The only important nuance is that the box from the nine does not match the features of the engine from the Korean, so you will have to change everything together | |
| VW Passat or Golf | Excellent reliability, amazing engine life, despite their age. You won’t be able to install engines from the latest versions of these German cars, because then you’ll have to redo literally everything. But engines from the 90s will take your VAZ 2109 on board very well |
| Another example of the excellent German quality of the engine that can be installed on the nine. In many ways it is similar to engines from Volkswagen and Opel in terms of characteristics, dynamics, and efficiency. It’s not difficult to find, but try to choose a motor with minimal mileage. This way you will ensure a long and carefree life for your car. | |
| Engines from FIAT | You should choose engines up to 2.0 liters. The best option is a 1.6-liter engine with 16 valves and a power of 90 horsepower. You will find such engines on the Doblo model. There are quite a lot of them at car wrecking yards, so there shouldn’t be any problems finding them. |
| Torquey, quite powerful, dynamic engine with a good margin of safety. A good solution for our roads. Japanese quality is not much inferior to the presented analogues from Germany. At one time, engines for the 626 model received many positive reviews, which is why their installation on the VAZ 2109 is recommended by many experts |
Replacing a motor is a complex operation that requires the participation of an experienced specialist. It is strongly not recommended to change the engine yourself in a garage environment.
How to convert an 8 valve engine to a 16 valve Installation features
The bolts may be visually very different from each other, but do not be alarmed. Modified bolts must be used.
Such bolts have the following characteristics:
- The diameter is equal to an 8 valve bolt;
- The length is 16 valve.
To make it easier for these bolts to fit into the hole, they should be pre-drilled. If you install the modified bolts according to all the rules and as carefully as possible, then the reliability of the engine can only be envied.
Cylinder head bolts VAZ 2114
When the car owner thinks that he is not able to perform this operation on his own, then it is better for him to seek help from qualified craftsmen with sufficient experience. They will definitely do everything right and as it should be.
An additional option to increase the power of the car is to tune the exhaust manifold. This is a great way to increase the power of your vehicle a little more.
Specifications
Motor characteristics:
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| PARAMETER | MEANING |
| Years of manufacture | 1994 – present |
| Engine weight, kg | 124 |
| Cylinder block material | cast iron |
| Supply system | injector |
| Type | in-line |
| Engine displacement | 1.5 |
| Power | 78 horsepower at 5400 rpm |
| Number of cylinders | 4 |
| Number of valves per cylinder | 2 |
| Piston stroke, mm | 71 |
| Cylinder diameter, mm | 82 |
| Compression ratio | 9.8 |
| Torque, Nm/rpm | 116 / 3000 |
| Environmental standards | EURO 4 |
| Fuel | AI 93 |
| Fuel consumption | 7.3 l/100 km combined cycle |
| Oil | 5W-30, 15W40 |
| Oil volume | 3.5 |
| When replacing, pour | 3.0 liters |
| Oil change carried out, km | 15 thousand |
| Engine life, thousand km - according to the plant - in practice | 150+ 200+ |
The engine is installed on VAZ: 21083, 2111, 2113, 2114, 2115.
Description of the components of both systems and features of the system with feedback
The converter is installed in the exhaust system in front of the additional muffler. It contains two oxidation catalysts (chemical reaction accelerators) and one reduction catalyst. Oxidation catalysts (platinum and palladium) help convert hydrocarbons into water vapor and carbon monoxide into carbon dioxide. A reduction catalyst (radium) helps convert nitrogen oxides into harmless nitrogen. Because the catalytic converter requires oxygen to neutralize hydrocarbons and carbon monoxide, and at the same time it must take oxygen to neutralize nitrogen oxides, it is necessary to very carefully maintain the balance of the air/fuel mixture (approximately 14.7:1) entering the engine.
This function is performed by an electronic control unit. The electronic control unit (ECU), located under the instrument panel on the left side of the body, is the control center of the fuel injection system. This is a specialized computer. It continuously processes information from various sensors and controls systems that affect exhaust emissions and vehicle performance. The computer also performs a diagnostic function for the fuel injection system. It can recognize system malfunctions, warning the driver about them through the “CHECK ENGINE” indicator lamp. It also stores diagnostic codes that indicate areas of trouble to help technicians make repairs.
The air filter is installed in the front part of the engine compartment with rubber clips. Filter element 9 is paper, with a large filter surface area. When replacing the filter element, it must be installed so that the corrugations are located parallel to the center line of the car. Throttle pipe 19 is fixed to the receiver. It controls the amount of air entering the intake pipe.
The flow of air into the engine is controlled by a throttle valve connected to the accelerator pedal drive. The throttle pipe includes a throttle position sensor 23 and an idle speed regulator 24. In the flow part of the throttle pipe (in front of the throttle valve and behind it) there are vacuum sampling holes necessary for the operation of the gasoline vapor recovery system. If the latter system is not used, then the fitting for purging the adsorber is plugged with a rubber plug.
The idle speed regulator 24 regulates the crankshaft speed at idle by controlling the amount of air supplied bypassing the closed throttle valve. It consists of a two-pole stepper motor and a cone valve connected to it. The valve extends or retracts according to signals from the ECU.
The throttle position sensor 23 is installed on the throttle pipe body 1 and is connected to the throttle valve axis. The sensor is a potentiometer, one end of which is supplied with a 5 V supply voltage, and the other end is connected to ground. From the third terminal of the potentiometer (from the slider) the output signal goes to the ECU.
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