Ten car engines with the most complaints over the years!

An engine is a machine that converts a form of energy into mechanical energy. Its function is to convert the chemical energy of liquid or gas into heat energy after combustion, and then convert the heat energy into mechanical energy through expansion and externally output power. The power of the car comes from the engine. According to the fuel used, the common engine can be divided into gasoline engine and diesel engine. Gasoline engines use gasoline as fuel and diesel engines use diesel as fuel.

As the heart of the car, the engine provides power, economy and environmental protection for the car's walking. Through the compilation of complaint data over the years, we selected 10 engine models with the most concentrated complaints from Zhonghao, which are all equipped with high-profile brand models.

Some of the engine problems have been basically solved, and some still have problems. Although the sales volume determines the number of problems in a certain engine to a certain extent, the defects are defects. I hope that the production companies will actively optimize and try to reduce the problems. Consumers have some understanding of some ailments to choose more reliable related products. In addition, on December 2, Huaqiang Jufeng Electronic Enthusiast held the Smart Car Sub-Forum of the 3rd China IoT Conference! Invite the big coffee from NXP, ST, Renesas Electronics, Infineon, and ZTE to share it!

Ten car engines with the most complaints over the years!

1 EA888 model engine

Involved in the brand: Volkswagen series

The issue of the EA888 engine was started by the media in 2015. It is understood that this model engine is divided into different production areas and is produced in Dalian and Shanghai factories. Complaints indicate that the oil spill problem reflected by the media is not limited to the valve cover, including the engine bottom, timing chain cover, turbocharger and intake manifold. From the principle analysis, the oil leakage problem is mostly caused by the thermal deformation of the cylinder parts or the aging and poor sealing parts.

First of all, the EA888 engine cylinder head and cylinder block are made of different metal materials (aluminum cylinder head and cast iron cylinder block). In the working environment, the oil may leak due to different expansion coefficients. Some industry insiders said that the separation of oil and oil from the oil and gas into the intake manifold is also the cause of oil leakage at the intake manifold. In April, the relevant person in charge of the company responded to the oil leakage problem of the EA888 engine, saying that the 4S shop has been notified to implement the relevant solutions, and the problem of the owner has been solved. The follow-up progress needs further observation.

In addition, the EPC fault light alarm problem is also common, and many owners reflect the phenomenon of vehicle jitter, acceleration, and fault light. Professionals explained that the EPC fault light alarm is mainly caused by the dirty throttle, and it can be solved by cleaning the matching throttle in time. In addition, there is a leak in the intake system and the crankcase ventilation system, and the control unit may therefore determine that the electronic throttle system has failed.

After many parties understand that there are many reasons for the EPC fault light alarm, the most common such as the brake light switch failure will also cause such a phenomenon. At present, the number of complaints about the models of the EA888 engine in 2014-2015 has been significantly reduced. Since the official has not clearly stated the solution, it is not clear whether the problem has been solved but it seems to have a good trend.

At present, the third-generation EA888 engine has been applied in some models. If consumers consider buying, it is recommended to pay attention to the complaints about the models related to the vehicle quality network. After the verification problem has been properly solved, consider starting.

2 JL478QEE model engine

Involved in the brand: Changan Automobile

It is understood that the JL478QEE model engine complaints are mainly concentrated on the winter oil emulsification problem, while other failure problems are relatively few. Emulsification often occurs in the inner wall of the valve cover, the oil filling port, etc., mainly related to the piston gas of the engine piston ring. The exhaust gas contains water vapor, which will cause the exhaust gas to enter the crankcase. As the circulating steam of the exhaust gas condenses into water at the top of the valve cover, it emulsifies with the oil. This phenomenon is particularly serious in winter.

In fact, the engine was recalled in 2013 due to emulsification problems. The manufacturer replaced the crankcase ventilation system piping freely, cleaned the engine and changed the oil to eliminate hidden dangers. However, the effect appeared to be unsatisfactory from the later complaints. It is reported that, due to the fact that the manufacturer is located in the Chongqing area, the valve cover of the JL478QEE engine is made of resin material, which lacks the insulation capacity. The manufacturer has also adopted the method of installing the insulation layer to make up.

At present, the JL478QEE model engine has been replaced by JL478QEG. From the complaint data, it is not found that the 2015 model with JL478QEG model engine oil emulsification problem, if it is confirmed that the problem has been solved, the same model is still worth starting.

3 HFC4GB2.3C model engine

Involved in the brand: Jianghuai

The data shows that the HFC4GB2.3C engine manufacturer is produced in Hefei, Anhui. The complaints about this type of engine in the vehicle quality network mainly focus on the electronic throttle delay problem and the idle speed instability. In fact, due to the characteristics of the working principle of the electronic throttle, there are different degrees of hysteresis compared to the mechanical throttle.

The electronic throttle is mainly controlled by the engine computer, and the control unit receives the signal from each sensor and corrects the electronic throttle opening. The complaint data shows that the problem is not an engine hardware failure. The manufacturer has given a solution to install the clutch position sensor and replace the engine computer and program.

It is reported that the HFC4GB2.3C model engine has been replaced by the HFC4GB2.3D model, and there are no complaints about the 2013-2014 model. For consumers considering the purchase of models equipped with HFC4GB2.3D models, it is now possible to consider starting .

4 LDE model engine

Involved in the brand: Buick, Chevrolet

It is reported that the LDE model engine is produced by Dongyue Powertrain Co., Ltd., and the current complaints mainly focus on engine jitter caused by ignition coil failure. In fact, engine jitter is mostly caused by poor combustion quality and insufficient power. The main problems are caused by faults in the intake system, ignition system or control unit.

Judging from the complaints received so far, in addition to the oil leakage problem, the engine is likely to be related to the ignition system. Failure of the ignition coil and spark plug can cause a lack of fire in the cylinder, causing engine shake. In addition to this, the timing of the valve or the cylinder pressure is low. If the phase of the valve is misaligned or the valve is not closed, the cylinder pressure is low, which may cause the engine to shake or even stall.

The data shows that the number of complaints has been initially improved in the models with this model after the 2013 model. However, since the problem of failure involves safety hazards and it has not yet been completely resolved, consumers are not recommended to start.

5 EC5 model engine

Design brand: Dongfeng Peugeot

It is understood that the EC5 engine is produced by the engine factory located in Fuyang, and the problem of burning oil in complaints is particularly prominent. It is learned from the data that the EC5 model 1.6L engine adopts the CVVT continuously variable valve timing system, and the piston adopts an independent cooling system, and the main cause of the burning oil is concentrated at the valve oil seal and the piston ring, which has to be made Questioning whether there are defects in the new technology applied.

The piston ring of the EC5 engine is different from the conventional piston. The separate cooling system can spray the oil to the top of the piston for cooling, but whether this will bring the oil consumption is worth further consideration. In addition, the compression ratio of the EC5 model engine reaches 11:1, and if the quality and elastic strength of the piston ring are not up to standard, the pressure in the crankcase will be too high, and the oil vapor will be circulated to the PCV through the crankcase ventilation system. Or brought into the intake pipe, causing the phenomenon of burning oil.

At present, the manufacturer responded in the complaint reply: “Because the internal parts of the engine are still in the running-in phase during the running-in period of the new car, the net on the cylinder liner is deeper and the oil is more stored (the lubrication between the piston and the cylinder wall) ), but as the running-in is completed, the cylinder wall mesh tends to be smooth, the oil consumption will gradually decrease."

At present, complaints about burning oil have indeed dropped significantly. I hope this means that the problem of burning oil has been effectively solved, but it is recommended that consumers still need to wait and see.

6 EC8N8 engine

Involved in the brand: Dongfeng Citroen

The EC8 model engine is a localized design product, which is mainly used in China and Latin America and North Africa. In fact, this engine is extended to 1.8L based on the TU series 1.6L engine and is produced at the Xiangyang engine factory.

At present, the main problem of this engine is the cold start abnormal noise problem. The sound of the squeaking sound disappears after a few minutes. The owner thinks that it is mainly related to the oil lubrication and valve timing mechanism during the operation. It is reported that the EC8 engine is not positioned at the high end, so the design abandoned the timing chain using the belt timing mechanism. To ensure high accuracy in the formal system, the EC8 engine uses timing gear damping technology.

In this regard, the engineering team of EC8 has said that it has done relevant technical discussions. The application of this technology can significantly reduce the vibration of the belt and meet the technical requirements of high precision timing. However, a large number of cold-start abnormal noise complaints received by the vehicle quality network currently reflect certain design defects in the EC8 model engine. In response to the complaint, the manufacturer stated that under normal circumstances, the engine will produce a normal working sound, which is determined by the working principle of the engine, and will not affect the normal performance or life of the vehicle. Please use it with confidence.

Since the manufacturer does not currently recognize that the EC8 model engine noise is a quality problem, it may not be effectively improved in the short term. If you are concerned about or sensitive to abnormal noise, it is not recommended to purchase this product.

7 EW10 model engine

Involved in the brand: Dongfeng Citroen

The EW10 model engine is produced by Xiangfan Engine Manufacturing Plant in Puyang City, Hubei Province, and it is one of the models that were put into domestic production earlier. At present, the main complaints received by China Automotive Quality Network are low-speed flameout problems, which are concentrated in the 2010 models. After the manufacturer discovered the problem in the early stage, the cleaning throttle valve was adopted. However, some car owners said that the flameout occurred after driving a certain mileage.

It is reported that the EW10 engine engine stall problem is due to the poor stability of the engine software at low speeds, and the vehicle will occasionally appear at the start or low speed. Since the flameout problem involves safety hazards, the manufacturer recalled some vehicles equipped with the EW10 engine on September 9, 2011, and upgraded the engine software for free to eliminate the hidden troubles. Afterwards, some car owners said that the flameout problem seems to have been resolved after being processed.

Although the manufacturer has recalled this issue, from the complaints received by the current car network, there are still car owners who still report the problem of stalling the car. Due to the consideration of driving safety, it is recommended that consumers should carefully consider the purchase of models equipped with EW10 models.

8 G4FA model engine

Involved in brands: Kia, modern

The G4FA model engine is produced at the engine plant in Shunyi, Beijing. The main complaints of this type of engine are concentrated on the more serious knocking problems. The knocking is generally caused by the fact that the flame has not completely diffused after the oil and gas in the combustion chamber is ignited, and the remote unburned oil and gas is self-igniting due to high temperature or high pressure. The flame collides with the normal burning flame to generate extreme pressure, causing the engine to produce an abnormal tap.

The main causes of knocking are as follows: the ignition angle is too advanced, the engine is excessively carbonized, the engine temperature is too high, the air-fuel ratio is incorrect, and the fuel octane number is too low. Previously, the knocking problem was once deadlocked. The manufacturer upgraded the engine control unit program three times and gradually upgraded the F2-A000 version to the current F4 version. However, the knocking problem has not been alleviated, and the engine power shortage and fuel consumption have appeared. Higher problems caused the dissatisfaction of the owner.

Judging from the current complaints, there is no knocking problem in the 2013-2014 models equipped with the G4FA model engine. It can be seen that the manufacturers have already overcome the technical problems and consumers can consider starting.

9 C6 engine

Involved in the brand: Ford

The C6 model engine is produced at the Nanjing Engine Plant in Jiangsu Province, and its main complaints focus on oil spills and engine shake problems. Complaints indicate that the engine oil leakage of this model is more serious, mainly due to leakage at the crankshaft and camshaft oil seal.

The engine assembly components are assembled from multiple components. The interior is divided into two parts: the lubrication system and the cooling system. For the oil, the sealing method is adopted, which is enclosed in its separate circulation pipe. Inside. However, because the engine is in a high temperature and high pressure working environment for a long time, the requirements for the sealing components are relatively high. Under normal circumstances, due to the long-term high temperature operation of the engine, the sealing component is more prone to aging failure during use.

However, from the complaints received by the current car network, some vehicles have oil leakage problems in less than one year, which shows that the durability of the sealing components is relatively poor, and the assembly process problems are not excluded.

However, judging from the current complaints, the complaint information received by the vehicle quality network that reflects the C6 model engine has been gradually reduced since January 2014, and the problem of oil leakage has not been ruled out. If the oil spill problem is solved, the model with the C6 engine is still worthy of the consumer.

10 HR16DE engine

Involved in the brand: Nissan

The HR16DE model engine is produced by Guangzhou Huadu Engine Factory. The main feature is high fuel economy. However, judging from the current complaints, the large number of burning oil problems has also tested its durability.

In fact, the engine burning oil is a common problem, and it is no strange to the German car owners. However, this time, as the HR16DE model engine equipped with Japanese cars, the problem of burning oil in the new and old models is puzzling.

From the point of view of common sense, the problem of burning oil is mainly concentrated in the valve oil seal and the piston ring. In most cases, the engine is prone to burn oil after excessive wear. However, as can be seen from the complaints, the problem of burning oil in the HR16DE engine often occurs within one year of purchase, and there are doubts about whether the product has design defects.

At present, many owners have replaced the engine assembly, but still reflect the phenomenon of burning oil. Not only that, the problem of burning oil still exists in the 2014 model. In summary, consumers need to think twice before purchasing the relevant products before the problem is solved.

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