CFNA (engine): characteristics, features, problems

German-made Cars are famous for their reliability, build quality, durability. Popularity all over the world they have won and thanks to impressive technical specifications, the formation of which special place is occupied by a power plant among which is fairly modern and in demand to this day remains CFNA - engine capacity of 1.6 liters.

Production

CNFA is an inline 4-cylinder petrol engine with 16 valves, distributed injection system of fuel. One of the features of the model is a chain of gas distribution mechanism DOHC – in the head there are now two camshafts.

Currently on the market you can find two basic versions of this installation - capacities 105 and 85 HP, and timing belt. Prior to 2015, all engines were exclusively German production, but now the domestic market there are models and with the units assembled at the Kaluga plant. The main difference from "the Germans” – the timing belt.

Specifications

Up To 190 km/h allows you to accelerate the German CFNAEngine. Characteristics for the most common variant of 105 HP with a manual transmission in this case cannot be called impressive:

• Displacement – 1598 cm³;
• Torque-153 nm at 3800 rpm./min;
• Acceleration to 100 km/h – 10.5;
• Capacity – 105 HP or 77 kW at 5600 rpm./min;
• Recommended grade of fuel – AI95.

Not pleased with the fuel consumption. When driving in the city will have to fill in at 8.7 litres per 100 km on the highway – a 5.1 in the combined cycle-6.4 liters. Moreover, when you select automatic transmission, fuel consumption increases by more than half a liter.

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His performance is not impressive modification, which has CFNA (engine) – CNFB power of 85 horsepower. When driving with a manual transmission they will be:

• Maximum power – 85 HP or 63 kW at 5200 rpm;
• Maximum torque-145 nm at 3750 rpm;
• Maximum speed-179 km/h;
• Acceleration to 100 km/h – 11,9.

Are available For purchase only model with a manual transmission. Fuel consumption of this combination is similar to 105 strong Assembly. But the differences appear engines and their design. First, more powerful unit has a stepless system changing the valve timing on the intake shaft. The peculiarity of the Assembly 85 HP is the ability to use 92-octane gasoline without any consequences.

Motor Design

The Volkswagen Company in the development of the unit is not planned to introduce completely new elements – the motor turned quite normal, but some updates are still present.

The Main features of the engine CFNA occur in the gas distribution mechanism – for easy maintenance and all items are protected by plastic covers, as important mechanisms highlighted in bright color.

But the main motor – block. It is made of a light alloy of aluminum, which at the same time reduced weight and increased heat transfer. On the cylinder block carved special channels the main oil line, its flanges and tides.

Shells are thin-walled, made of cast iron. Bed of radical bearings are assembled. The cylinder head is a monolithic design made from aluminium.

Lubrication System and fuel injection

Particular attention should be paid to the lubrication system the major sites – it is the combined type. The most loaded mechanisms are processed under high pressure, and other elements two ways – directed and chaotic spray of oil flowing out from gaps between the elements. In CFNA 1.6 engine lubrication is forced by the pump into the crankcase – it is driven by the crankshaft. It is a replaceable full-flow filter made of porous paper.

The Main task of the distributed fuel injection system is a balanced feed mixture during operation of the motor. This task is possible due to the harmonious operation of the injectors and throttle knot. The first is responsible for the formation of the fuel-air mixture, the second – for accurate dosing of air entering the engine block. When the throttle is opened, the intake air mass and measured delay of the fuel mixture.

Thanks to this scheme functioning in CFNA engine receives a balanced amount of combustible mixture at each moment of its operation. This, in turn, allows to reduce energy consumption, toxic emissions and maximum power. Controls the fuel supply system of the ECU in conjunction with the controller.

Service Features

The Manufacturer guarantees the normal operation of the engine for 200 thousand km with timely and quality service. Maintenance work should be carried out every 15 thousand km while operating the vehicles in normal conditions, and twice as likely in heavy.

First you will need to change the engine oil. Pour the recommended lubricant 5W40 with a tolerance of VW-Norm 502 – it will not only provide a VW engine CFNA normal job, butincrease service life, reduce the amount of fuel consumed. Simultaneously, replace the oil filter.

To Completely change the fluid cooling system is not necessary. It is only necessary every 15 thousand miles to check its number and if necessary fill the level. The air filters and fuel change twice as often, but if you drive in extremely dusty environments, the first element should be changed every 7.5 thousand mileage.

In all other respects it should follow the normal requirements of the maintenance – regularly check the drive belts conductive hoses and lines, and CFNA the engine will not keep itself repaired.

Work

Presents serious engine problems during the operation causes. If you bought the car from the factory, the first 1-1,5 thousand km carefully watch the engine oil level – during break-in showed an increased consumption, but below the critical value the volume of lubricant never decreased.

When driving in very hot weather with an empty tank drivers can alarm loud buzzing fuel pump. To fix this problem is replacement of the filter element of the fuel supply system. Very often disturbing and buzzing sound, especially when the door driver side open – so running the same pump, and to reduce noise levels will fail.

Common problem

Every owner of a car with the engine facing one problem – knocking, rattling diesel sound during operation. Causes of high level noise are a special form of pistons, as well as in “squeeze” exhaust manifold. The problem can be solved in two ways:

1. Modified pistons marked EM – this option is preferred for machines whose warranty has not yet ended, because the work is obliged to carry out service.
2. Replace the pistons and exhaust manifold with a 4-2-1 piscatawy with simultaneous reprogramming of the control unit – this path will not only get rid of the noise, but also enhance the capacity of the installation, but to hold it will have on their own.

To Carry out such work the owners have VW POLO – merely these cars is the engine. And to perform the repair procedure will have to be periodically – after an indefinite period of time, a knock appears again – this is the motor design. But a knock disturbed only by the acoustic idyll, and does not affect resource and is not indicating the typical information.

Note

Serious trouble, you can call knocking under the hood when riding over a rough road. If your suspension, steering rack is in order, it is faulty left pillow of the engine. She very often can not withstand voltage and requires replacement.

To extend the life, use only high-quality fuel with an octane rating of at least 95 engine CFNA – the problem of unstable operation, jerks and jolts then it will pass you by. In cases that are difficult to start in extreme cold, inspect the starter.

A Frequent problem is the appearance of cracks on the standard exhaust manifold. To detect defects can be, if you pay attention to the change in the sound of the engine. The fault is eliminated by the installation of more modern “spider” 4-1 or 4-2-1 with the simultaneous reinstallation of software of an ECU.

Budget solution to this problem would be TIG welding. But to use such only after the expiration date, otherwise you will lose the right to service.

Tuning unit

The engine CNFA laid some reserve power, which guarantees the stable operation for a long period. But to use the reserves and to increase the power. Doing a simple operation horsepower can be increased from 105 to 130. To do this:

1. Purchase and install piscatawy exhaust manifold 4-1 or 4-2-1.
2. To Make or buy an intake system cold air.
3. To Reprogram the electronic control unit.

Such manipulation is usually carried out by the owners of the VW POLO. Other additional operations not make sense to carry out for the cost of all works will be higher than the price for a more powerful and modern engine.

Recommendations

To extend the life of the power plant, refuel only on trusted stations. The difference in the quality of German and domestic fuel have a serious impact on the resource.

It's All about graphite coated piston – it wears out quickly when using inferior fuel, which leads to scuffing. In any case, do not allow overheating of the installation. This greatly affects oil consumption, the lack of which instantly leads to "welding" of the connecting rod liners.

For these reasons, drivers are advised to follow mainly the quality of the used fuel and the engine oil level. Engine CFNA reviews make positive. Choose a car with such a powertrain should those looking for a budget solution for a calm and measured drive.