We continue our story about diesel engines popular in the secondary market and their features. The focus is on Korean engines manufactured by Kia / Hyundai CRDi.
Consider how reliable diesels 1.6 CRDi (U), 1.7 CRDi (U2), 2.0 / 2.2 CRDi (D), 2.0 / 2.2 CRDi (R) are.
What are the features of CRDi engines
Diesel engines with a direct injection system, which are produced by the Korean auto industry Kia / Hyundai, are called CRDi - common rail direct injection.
Diesel engines similar in design can be found in Fiat (CDTi), Ford (TDCi), General Motors (CDTi / VCDi), Mercedes (CDI / CRD), Volkswagen (TDI).
Feature of CRDI motors and their analogues in that, unlike the usual diesel engines with high-pressure fuel pumps with a cam drive, fuel is supplied to the injectors from a common reservoir (fuel rail), where it is stored under high pressure. When the ignition key is turned, the fuel is pumped by a separate pump into the rail, and then it enters the fuel injectors under pressure through the fuel lines.
Due to the constant high pressure in the system (in CRDi engines, the pressure reaches 2000 bar), diesel engines with direct injection are more economical and environmentally friendly.
- Fuel is injected in doses and is better sprayed throughout the chamber, burns more efficiently.
- Fuel pressure remains the same regardless of crankshaft speed or fuel volume.
- The opening of the injectors is controlled by the EDC control unit.
- The separation of the processes of fuel injection and its injection allows you to achieve multi-phase injection or change the pressure depending on the load on the engine, which increases the efficiency of the diesel engine and reduces detonation in the cylinders.
To the disadvantages of CRDI and similar engines include a more complex design - hence the cost and complexity of maintenance and repair, as well as sensitivity to the quality of diesel fuel.
Indeed, Common Rail engines, including Korean CRDI units, can fail due to a breakdown of the pump, injectors and other elements of the power system, even due to small third-party impurities in the fuel. With the fastidiousness of diesel fuel with a direct injection system, the opinion about their unreliability as a whole is also associated.
- Read about typical Bosch Common Rail problems
Let's see how things stand with the reliability of diesel engines that are installed on a number of Hyundai and Kia models.
Kia / Hyundai 1.6 CRDi (U)
The 1.6-liter diesel engine (D4FB) was introduced in 2005.
Together with him, they presented a 1.5-liter engine (D4FA), the only difference from the 1.6 version is the smaller diameter of the cylinders, and a 1.1-liter three-cylinder unit (D3FA), a smaller copy of the same 1.5 CRDi
- A little later, in 2008, the 1.4-liter D4FC was added to the CRDi diesel family, it is distinguished from the 1.5 version by the piston stroke.
- In 2010, the top 1.7 CRDi (D4FD) appeared in the family, which became the most popular.
Since diesel engines 1.4 and 1.7 appeared later, they are usually referred to as another generation of CRDi engines - U2.
In general, the engine family U this is the first independent development of Hyundai-Kia in terms of diesel engines with a CR injection system.
These motors are considered quite reliable, their advantages are a relatively simple design and the absence of expensive “chronic” sores to eliminate. Common Rail fuel equipment from Bosch, although picky about fuel, is considered quite resourceful.
Structurally 1.6 CRDi is a 4-cylinder unit, 4 valves per cylinder and 2 camshafts. The cylinder block is cast iron, the cylinder head is cast aluminum.
The 16-valve versions of the U-family engines, including this 1.6 CRDi, do not have a dual-mass flywheel, which reduces the cost of maintenance.
The 1.6 CRDi turbine is used with variable geometry. The timing drive is unusual, it consists of two chains and a tensioner.
All versions of the motor have hydraulic valve compensators, since 2009 phase regulators have also appeared.
All versions are equipped with proprietary swirl flaps Swirl Control Valve, electronically controlled EGR valve and particulate filter.
Power depending on the version, it varies from 90 to 136 hp. (235 - 280 Nm).
- The U1 family has two versions - LP (90 hp) and HP (115 hp)
- The U2 family also has two versions - LP (128 hp) and HP (136 hp)
We puton the:
- Hyundai i30 (1 and 3), Hyundai Accent RB, Hyundai Elantra (4)
- Kia Ceed, Kia Cerato, Kia Soul, Kia Vengra.
The owners praise the fuel efficiency of the engine and the absence of an oil burner. For a diesel engine, the unit works culturally and quietly. The engine has no problems with cold starting, it can withstand conditions down to -20 ° without problems.
Overall, the 1.6 CRDi's reliability is above average, but there are a few issues that haven't spared it.
- A proprietary problem is considered to be cracking of the "return" line, which goes from the nozzles to the tank. For this reason, the engine may not start when hot. The breakdown is solved by replacing the tube.
- One of the timing chains can stretch up to 100-150 thousand km, although the manufacturer claims an unlimited resource. Unstable engine operation and tripping may be due to a stretched chain.
- CR Bosch injectors are afraid of bad fuel. If they are dirty, the motor will twitch and stall constantly. Another reason for the same problem is a failed fuel rail pressure regulator.
- In the early years of production, owners faced the problem of prematurely dying turbines: a software bug caused the compressor to run at too high a speed. If the turbine starts to howl at low mileage, you should start by checking the boost sensor contacts.
- Interruptions in the operation of engines manufactured in the 2010s are most often associated with untimely replacement of the fuel filter.
- Dropping thrust and interruptions in power are usually attributed to dirty swirl flaps. The intake manifold, swirl flaps and EGR valve should be cleaned regularly.
The manufacturer determined the resource of 1.6 CRDi at 200 thousand km, but with good care, the engine will live one and a half times longer before overhaul.
Kia / Hyundai 1.7 CRDi (U2)
The 1.7-liter diesel, introduced in 2010, became a logical continuation of the U family and led its second generation, the U2.
This is a 4-cylinder in-line unit with 16 valves and two camshafts. The timing chain drive consists of two chains and a tensioner. The block is made of cast iron, the head of the block is made of aluminum.
Turbine - with variable geometry.
Hydraulic lifters are on all versions. D-CVVT phase regulators are also used, which is quite unusual for diesel engines.
Bosch CR fuel system with electromagnetic injectors. The engine is equipped with a particulate filter and an ERG system.
The motor is produced in two versions:
- LP with 114 hp (260 Nm)
- HP 141 hp (340 Nm)
Installed 1.7CRDion the:
- Hyundai i35 (2), Hyundai i40, Hyundai Tucson,
- Kia Carens (3), Kia Optima, Kia Sportage (3.4).
Owners praise this popular Korean diesel for confident start-up even in cold weather, inexpensive maintenance, high-torque power with moderate fuel consumption.
Disadvantages 1.7 CRDi can be attributed sensitivity of fuel injectors to fuel quality. The low prevalence of the engine complicates the repair and search for spare parts.
In addition, it has some other problems.
- The 1.7-liter diesel is characterized by oil leaks from under the valve cover. Replacing the gasket together with the cover under warranty does not solve the problem for a long time.
- If the engine troit and twitches during acceleration, the nozzles are probably worn out: from low-quality fuel, wear will be quick.
- Thrust disappears from clogged filters, especially fuel filters. It is impossible to violate the rules for replacing it, otherwise you can disable the power system.
- Electronic errors in the operation of the turbine may be associated with the wiring of the sensor: check the integrity of the contacts.
- There have been cases of engine overheating due to a broken cylinder head gasket, and the malfunction is typical for cars.
The manufacturer claims a resource of 1.7 CRDi at the level of 180 thousand km, but with good care it will last longer.
Kia/Hyundai 2.0/2.2 CRDi(D)
Diesel 2.2 of the D4EB series was produced from 2002 to 2011 in Korea. In the early years, it was installed only on the Hyundai Sonata. The engine is not an independent development of the concern, but a creation jointly with the Italians from VM Motori. After the release, the motor was modernized more than once.
Also, the D family included a 1.5 liter unit (2001-2006) and a 2.0 liter diesel engine (2000-2010).
Structurally 2.2 CRDi(D) It is a 4-cylinder cast-iron block with a 16-valve aluminum head.
A belt is used as a timing drive. Power system - Common Rail Bosch.
Power depending on the version is 139-155 hp. (343-353 HP)
Installed 2.2 CRDi (D) on large models:
- Hyundai Santa Fe (SM, SM), Hyundai Sonata (EF, NF), Hyundai Grandeur TG.
2.0 CRDi was assembled in 2000-2010 and installed on popular models:
- Hyundai Santa Fe (SM, CM), Hyundai Tucson JM, Hyundai Elantra XD, Hyundai Trajet, Hyundai Sonata NF
- Kia Sportage JE, Kia Magentis MG, Kia Carens UN, Kia Cerato LD
Power 2.0 CRDi (D) varies from 112 to 151 hp. (245-350 Nm).
Problems during operation of 2.2 and 2.0 CRDi (D) are of the same type and are mainly related to the age of the motor.
- Typical age-related sores of this diesel engine are cracking of the cylinder head and burnt washers under the nozzles.
- Fuel equipment with high mileage or the use of dubious fuel also causes problems: the nozzles become clogged with foreign fractions in the fuel, the high-pressure fuel pump starts to “drive chips”.
- It is important to change the timing belt according to the regulations, otherwise, if it breaks, the valves will bend.
- If the engine freezes at certain speeds, the ECU is probably not working correctly, and the EGR valve is covered with soot.
- The oil receiver eventually becomes clogged with burnt oil residue, which leads to starvation in the engine lubrication system and can cause the liners to rotate.
The manufacturer estimated the diesel resource 2.0 / 2.2 CRDi (D) at 250 thousand km.
Kia/Hyundai 2.0/2.2 CRDi(R)
This diesel was introduced in 2009. The R family, which, unlike D, is already a completely independent development of the Koreans, includes two units with a volume of 2.0 and 2.2 liters. The engines are assembled at the company's own plant in South Korea.
Structurally, 2.0 / 2.2 CRDi (R) differ in the following. The block and block head are cast aluminum, the motor has 2 camshafts and 4 valves per cylinder. The valves are equipped with hydraulic compensators.
Plastic intake manifold and valve cover. Turbine - with variable geometry breakers.
The timing is driven by two chains with a hydraulic tensioner. To reduce vibration, a lower balance shaft is provided.
As expected, the engine is equipped with a particulate filter and an exhaust gas recirculation system.
Bosch Common Rail power system with piezoelectric injectors.
Power of the 2.2-liter version varies from 197 - 200 hp (421 - 441 Nm).
They put such a motor on
- Hyundai Santa Fe (2, 3), Hyundai Grandeur (5.6)
- Kia Sorento (2.3), Kia Carnival (2.3)
Power 2.0 CRDi(R) is 136 HP (320 Nm) for the LP version and 185 hp. (400 Nm) for the HP version.
Put these diesels on
- Hyundai Tucson (ix35 2, 3)
- Kia Sportage (3,4)
Owners praise the fuel economy and traction of the 2.0/2.2 CRDi(R) engines. In general, these diesel engines are considered quite reliable and modern, while they do not require expensive "consumables".
The disadvantages include the sensitivity of the injectors to poor fuel and the complexity of maintenance: some repairs require highly qualified craftsmen. So, when replacing glow plugs, they often break.
We list the typical malfunctions of the 2.0 / 2.2 CRDi (R) engine.
- Tapping and other noises in the engine compartment, in the area of \u200b\u200bthe timing chain. These sounds are connected with the fact that the hydraulic tensioner channel is clogged with used oil, it needs to be cleaned.
- Fans of active driving are faced with the fact that the engine takes oil: about 0.5 liters per 1000 km.
- If the engine starts to triple or stall, it is likely that the nozzles are clogged with sediment from the fuel and impurities. Sometimes washing the injectors on the stand helps, but if they fail, they are not restored, but replaced with new piezoelectric injectors.
- Jerking of the car during acceleration and dips in engine power are a sign of a clogged fuel filter. It is inexpensive, the main thing is not to be lazy to change according to the regulations.
The Korean automaker estimates the resource of a 2.0 / 2.2 CRDi (R) diesel engine at 250 thousand km, but the experience of the owners shows that in practice the engine lives longer, the main thing is to choose high-quality fuel and service the internal combustion engine on time.
.Diesel fuel injectors can be found in our catalog
The D4EA 2.0 diesel engine has a traditional arrangement of four cylinders in one row. The fuel system of this power unit provides for the installation of a Common Rail ramp. The nozzles are designed in such a way that they can work at very high pressures. The cylinder head is either with one shaft or with two, it all depends on the number of valves installed on the engine modification.
The D4EA 2.0 CRDI engine, reviews of which are located on this page, is distinguished by direct fuel injection, provided by the injector. This is evidenced by the prefix CRDI in the marking. This makes it possible to obtain a very clean exhaust, as well as to provide a relatively low fuel consumption, given the displacement.
The turbine of the D4EA engine was usually chosen by WGT or TCI, and also worked with an air pre-cooler - an intercooler. But this does not happen everywhere, for example, the Santa Fe classic D4EA is equipped with a different supercharger - TD025M from Mitsubishi. Modern models of superchargers are capable of delivering more power to the power unit, so the dependence of the date of manufacture and power is directly proportional.
Therefore, the Hyundai D4EA engine, which is equipped with an additional WGT supercharger, is capable of delivering only about 113 hp - 120 horsepower. Motors equipped with a TCI or VGT turbine can develop 150 and 140 horsepower. With all this, regardless of power, the volumes of the combustion chamber remain identical, and only the compression ratio of the fuel changes. The VGT turbine can work without an intercooler, but it's not worth experimenting, since the air pressure is greatly increased. In addition, this supercharger model is designed to work with an individual high pressure fuel pump.
The Santa Fe 2.0 D4EA diesel engine also has a very important feature that does not apply to the turbine model being installed. This feature consists in individual adjustments of parameters for a specific car body. Depending on whether you have a crossover, sedan or minivan, the parameters will be different.
Peculiarities
The D4EA 2.0 CRDI engine, which has a very long resource, is not a classic diesel engine, it is something more. Against the background of similar engines, it stands out for its design features, which are as follows:
- Cylinders and drain channels for lubricants and coolants are bored directly into the cylinder block, which is completely made of cast iron.
- The motor device provides for the fact that a durable steel crankshaft and a cast camshaft are fixed by five supports.
- The reliability of the power unit is ensured by the fact that the cylinder head is made of aluminum, as well as the water pump housing.
- The fuel begins to burn in a separate vortex chamber, which provides additional power.
- For the distribution mechanism of gases, two schemes SOHC and DOHC are used, which are the most optimal.
- The high pressure fuel pump is driven by a gear train from the camshaft.
- The D4EA timing belt drives the gas distribution mechanism, which provides reliability in comparison with a chain drive.
- The CRDI 2.0 motor provides for the installation of an intercooler, which is made of aluminum and is made in a plate design.
- The turbine together with the air blower are brought together in one common unit, which allows for the greatest efficiency.
- The description of compressor operation is based on the combination of exhaust gases and clean air from the environment.
- Thanks to the installation of a special bypass valve, it is possible to relieve excessive pressure from the system, which allows you to extend the life of the power unit.
The D4EA motor, the characteristics of which are presented above, is distinguished by a rather interesting operation of the cylinder head with one shaft. In this case, the thermal clearances of the valves are adjusted automatically using hydraulic compensators. The dual shaft head, which is designed for DOHC operation, is not equipped with such a system, so the valves must be adjusted manually.
The D4EA motor, the reliability of which leaves no doubt, in 8 and 16 valve versions also differs in exhaust gas distribution schemes and the location of some attachments. Other components remain identical, including the ignition system and glow plugs on the D4EA 2.0 CRDI. The D4EA engine injector is also identical for both engine versions.
Flywheels are absent only on those models of the power unit that were installed on the Kia Sportage 2006 and were paired with an automatic transmission. In any other case, the motor works with flywheels.
If you pour high-quality oil into the D4EA engine and use only high-quality diesel fuel, then the life of the D4EA engine will be relatively long. The power unit works without any complaints and has no typical problems, so it has become quite widespread in the secondary market and has acquired an army of its fans. This phenomenon is also evidenced by the reviews left by the owners of cars with such power units.
Do you know what a CRDI engine is? We will explain to you! In connection with the adoption of more stringent environmental measures to release harmful substances into the environment, they began to use the Common Rail fuel system for diesel engines.
The fuel supply to the cylinder in the system proceeds under high pressure. Therefore, cars with Common Rail have gained fuel savings of the order of 15% and an increase in engine power by 40%. The CRDI system has become widespread among cars with diesel engines that are operated with this particular system.
System description
The term Common Rail literally translates from English into Russian as "common highway". Based on the translation of this term, it is this definition that is laid down in the principle of operation of this system. When it was created, a new CRDI diesel engine with direct fuel injection into the cylinder was designed.
The CRDI engine received improved performance in terms of dynamics and power, which were compared with analogues of the characteristics of gasoline engines. A special electronic unit was developed for program control of engine modes. The last step in the development of this system was the supply of high-pressure fuel to a common line.
Any diesel engine is characterized by various operating modes and variable loads. When the engine is running, a different load occurs, independent of the crankshaft speed. The question arises, how is high pressure stabilized in the system?
For this purpose, a control unit was installed that maintains a high pressure in the system by changing the amount of work of the fuel pump. Moreover, the maximum pressure is created when the crankshaft speed reaches a minimum value.
From the operating conditions of the motor, the ECU, by supplying various impulses, activates simple nozzles that are equipped with electromagnetic or piezoelectric valves.
The advantage of Common Rail lies in the optimal operation of the engine. The maximum fuel burnout output in CRDI cylinders is closely related to the high accuracy of the electronic unit and high injection pressure. Moreover, optimal results are achieved in all engine operating modes. Based on this, there is a decrease in fuel consumption and a decrease in the toxicity of exhaust gases.
With the creation of CRDI, which has significant potential, the diesel engine industry has been widely developed. Everyone knows that it is necessary to develop technologies to reduce emissions of exhaust gases into the atmosphere. Since environmental standards for toxicity are regularly increasing. Due to all these conditions, Common Rail will continue to develop intensively.
Advantages and disadvantages of the CRDI system
The insignificant presence of toxic elements in the exhaust gases is created due to the complete combustion of the fuel-air mixture, and there is a significant increase in engine power.
The main difference between the CRDI engine system is the preservation of fuel pressure at the same level and independence from crankshaft speed, fuel volume and various other factors that could affect injection under different engine operating modes.
Due to the electronic control unit, when fuel is supplied, the nozzles for injection open. A design feature of the system injectors are special electromagnetic solenoids built into them. Thank you for making this all possible.
It is also a feature of this system. In the Common Rail injector, the needle is lifted by the control of the solenoid, and not by the pressure of the fuel.
Also in the system there is a software control of the injection pressure, the amount of fuel and the injection advance angle. That is, the program is programmed into the ECU and is used under different conditions and engine operating modes.
Fuel injection and injection are completely separate processes. Which led to another advantage of CRDI, namely multi-phase injection, at least two-phase. Depending on the speed range, the number of revolutions and the load on the engine, it is possible to dynamically change the injection pressure.
In Common Rail, phased injection occurs in 1 working cycle, although earlier dual injection was assumed during the development of the system. Greater attention was paid to getting rid of detonation. Today developed systems provide nine phases of fuel injection. Phased injection has significantly reduced the running noise of the CRDI diesel engine, which is another benefit.
The exact dosage of fuel within the injection time is ensured by a high constant pressure in the rail. In previous developments with a conventional high pressure pump, this was not possible. All attempts to change the pressure led to the occurrence of undulating pulsations in the pipelines, from the pump to the nozzles.
As a result, when exposed to these waves, pipelines quickly failed. Therefore, in the high-pressure fuel pump, the pressure due to which fuel is injected into the nozzles is strictly limited. It became clear that simple high-pressure fuel pumps cannot generate a pressure of 300 kg/cm2. And the Common Rail system pretty much exceeds this figure. The CRDI system without destruction of the system and pressure fluctuations assumes a mark up to 2000 bar.
Along with the advantages, the CRDI motor has a number of significant disadvantages. One disadvantage is sensitivity to the quality of diesel fuel. Many elements of the system, namely nozzles or a pump, instantly fail when the smallest otherworldly particles or fractions enter.
Another disadvantage is the high cost of engines equipped with a CRDI system, which ultimately increases the overall cost of the vehicle. For the precise operation of the engine, which are incorporated in the design, therefore, such a system is complex.
Therefore, the possibility of repair in a garage is excluded, only in specialized services. Because the repair of the system requires special tools, diagnostic stands and various types of equipment.
When repairing a CRDI, a modular replacement of spare parts is required. And this leads to additional expensive costs. Accordingly, from the above reasons, the cost of the work performed will be quite high.
Based on the above information, it becomes clear why in Russia many car owners still regard the Common Rail diesel engine power system as an unprofitable solution. It's all about the quality of domestic fuel and the level of service for cars with such engines.
All components of the CRDI motor are made with increased precision, that is, penetration into the system of third-party elements is not allowed. Under high pressure conditions, after consuming low-quality diesel fuel, parts will instantly become unusable. And their replacement implies certain difficulties and increased costs.
Seeing unfamiliar letters, a potential car owner will definitely ask what a CRDI engine is. You need to know what you are going to buy, what you are paying honestly earned money for, what you will get for them - including, and what problems are planned in the future. What is interesting is that for some reason such a motor power system is considered almost exotic, and therefore causes some distrust.
However, this is a misconception: many automakers equip their products with it. They just call the system something else.
For example, Volkswagen calls it TDI, Fiat even has several names: CDTi, TtiD, DdiS, JTD; and General Motors may indicate that a car is equipped with a CDTi or VCDi. The names are different - the essence is one. Another interesting but little-known fact: motors with a similar power supply are widely used in shipbuilding and railway trains. This alone can significantly increase the degree of trust in her.
What is a CRDI engine can be understood by simply deciphering the abbreviation. It stands for Common Rail Direct Injection, which, as a first approximation, should be interpreted as direct (injector) injection of the fuel mixture along the highway. However, interlinear translation does not cover much the technical side of the issue, so let's figure out what we are dealing with.
The essence of the idea and the principle of its implementation
The idea is to make the pressure in the entire supply system independent of the frequency with which the crankshaft rotates and also on the volume of fuel supplied. In conventional injectors, diesel fuel is supplied to the nozzles with a lower pressure, which rises during subsequent processes.
The CRDI uses a common accumulator that creates the right pressure, after which the fuel enters a common rail, also called a common rail. The needle on the nozzle rises not as a result of exposure to higher pressure, but by a special solenoid built directly into the nozzle.
Due to the fact that the 2 most important processes - the creation of the required pressure and direct fuel injection - are separated, it became possible to carry out injection in several phases, and they can be used in parallel during one working cycle. On the first models of this system, there was a two-phase injection, in modern, more advanced variations, the number of phases has increased to 9.
What does the CRDI system provide?
Thanks to all the engineering tricks described, an engine with such an injection has a number of advantages.- The requirements for environmental cleanliness of motors are becoming more and more stringent every year. Distribution of fuel using CRDI provides the ability to fully comply with these regulations;
- A thin spray of diesel fuel allows you to spend much less fuel on the engine. Savings reach 25% for some engines;
- Precise, metered injection provides an increase in engine power by 40%;
- A side, but very pleasant consequence of using common rail injection was a noticeable decrease in engine noise - studies conducted by automakers showed a decrease in sound background by 10%.
In a word, the system favorably affected many engine characteristics.
but on the other hand
It can't be all good. Consequently, the CRDI injection system also has certain disadvantages.
The main thing that can confuse the owner of a car is the exactingness of CRDI on fuel. Diesel fuel should be almost perfect, but in our open spaces it is not always possible to fill at least a good one.
Spare parts per system cost a quarter more than more modest options. Here you can also complain that CRDI uses a catastrophically many sensors - and this is its weak point. In addition, not everywhere there are car services with sufficiently trained craftsmen. The system is of little use for self-repair: the work requires special equipment.
Of course, knowledge of what a CRDI engine is and what problems it can bring to its owner cannot be regarded as an obstacle to buying a car with such a unit. However, it’s still worth asking if there are competent specialists in your area, and it’s still worth looking for a reliable gas station in advance: such actions will either prevent possible problems, or, if they give negative results, make you think about another car.
586 | 21.09.2018
The first Korean turbodiesels with the Common Rail system appeared in 2000. That is, the Koreans have not lagged behind the global trends in the creation of diesel engines. The first-born in the CRDI family is a 4-cylinder 2-liter engine with. It was followed by a 3-cylinder 1.5-litre engine with the designation D3EA. In 2002, a 2.2-liter modification (D4EB) appeared, based on the 2-liter CRDI.
In this article, we will talk specifically about the first version of the engine - 2.0 CRDI (D4EA). Much that has been said about him is also true for his closest relatives with a volume of 1.5 and 2.2 liters. You can watch a video about the device and engine problems on our YouTube channel
You can buy a Hyundai or Kia 2.0 CRDI (D4EA) contract engine from.
The 2.0 CRDI (D4EA) engine has a cast-iron block, there are 16 valves in the aluminum cylinder head, one camshaft, valve actuation by roller levers (rockers), with hydraulic compensators. Timing belt drive. The power of the D4EA engine ranges from 112 to 150 hp. Versions more powerful than 125 hp equipped with a variable geometry turbine Garret. We are dismantling the basic version of the engine with a turbine with a bypass valve. Bosch common rail fuel system with CP1 injection pump.
By the way, this engine was widely used in Russia on the Santa Fe Classic model, which was assembled at TagAz until 2010. And in Ukraine they assembled the first "Santa" with this engine until 2006.
Reliability and engine life 2.0 CRDI (D4EA)
There is a lot of conflicting information about the reliability of this engine. Many of these engines serve without problems even with a mileage of more than 400,000 km. At the same time, quite a few 2.0 CRDI engines went to capital or were replaced with runs of about 150,000 km. Much depends on the quality of service, the "observation" of the owner and the quality of the fuel.
Turbocharger
The turbine on this engine is quite reliable, resourceful and usually does not cause problems. But the boost sensor, especially on 2.0 CRDI engines with more than 125 hp. pretty buggy. In 2014, the Koreans even announced a recall campaign, in which all high-power 2.0 CRDI engines manufactured before March 10, 2014 changed the boost sensor.
glow plugs
Glow plugs on a 2.0 CRDI engine should be changed every 3 years - they don't last longer.
One of the causes of oil
The basic 112-horsepower version of this engine is devoid of an oil separator for the crankcase ventilation system. Here, in the valve cover, there is simply an oil baffle plate. Resourceful owners of cars with this engine installed an oil separator of their own design. Due to such a frankly simple solution, a lot of oil vapor, especially when the oil separator plate is dirty, simply flies into the intake and burns out in the cylinder chambers. Periodically cleaning the valve cover is required to eliminate this cause of oil burning.
The problem with clogging of the breather of the crankcase ventilation system, which can be judged by soaring from the oil filler neck, should not be started in any case. You can get to a strong oil burn, a critical decrease in its level and to a violation of the lubrication of the crankshaft journals with the resultant turning of the liners and even the destruction of the connecting rod journals. Yes, yes, all these troubles can happen simply because of the “wrong balance” of gases in the crankcase.
The VKG valve on the 2.0 CRDI engine is membrane and usually there are no questions about it: the membrane lasts a very long time.
Fuel systemBosch
The fuel system is capricious, very sensitive to fuel quality. Worn injectors begin to drain a lot of fuel into the return line, which is why the 2.0 CRDI engine starts poorly and stalls. For uncertain operation of the engine, one injector pouring into the return line is enough.
But if the nozzle starts to spray fuel incorrectly, injecting fuel early, then you can get to the engine overhaul. Due to improper combustion of the fuel mixture, the piston in the cylinder burns and collapses with incorrect fuel spray. In general, the injectors on the 2.0 CRDI engine require close inspection and preventive testing on the stand.
In addition, refractory copper washers naturally burn out under the injectors, which causes coking of both the injector sockets and the cylinder head cavity, excess pressure arises under the valve cover and in the crankcase ventilation system.
You can buy diesel fuel injectors for a Hyundai or Kia 2.0 CRDI (D4EA) engine from.
Separate troubles are caused by failed fuel pressure regulators and a fuel pressure sensor mounted on the rail. If the regulator malfunctions, the 2.0 CRDI engine stalls during acceleration, starts uncertainly. If the pressure sensor malfunctions, it does not develop speed.
You can buy a fuel pump (TNVD) for a Hyundai or Kia 2.0 CRDI (D4EA) engine from.
Problems with the cylinder head
A lot of problems with the 2.0 CRDI engine occur in its head. Hydraulic compensators here turned out to be unreliable, they can fail. Moreover, in the saddest case, a rocker may fly off a faulty hydraulic compensator or a valve may dry out. Mechanical damage to the engine in this case will hit the owner's pocket hard.
The head of the 2.0 CRDI engine block is not favored due to valve wear: the development of a working chamfer in a valve disc-valve seat pair. Also, the cylinder head may simply crack along the channels of the glow plugs or deform.
There is a fairly fair opinion that all these troubles are due to the incorrect operation of worn fuel injectors. Therefore, if the 2.0 CRDI engine was brought to capital, then it is important to find the cause and be sure to check all the nozzles.
Cooling pump
Also behind the 2.0 CRDI engine there is such a sin as pump jamming. Since the pump is driven by a timing belt, its jamming leads to a broken belt and “Stalingrad”: the pistons and valves will collide and damage each other.
Piston group
On the pistons of the 2.0 CRDI engine, piston rings can collapse, partitions can collapse. And again, this is due to improper mixture formation, when the nozzle injects fuel not into the recess in the piston bottom, but too early - almost throughout the entire volume of the cylinder, which causes excessive heating of the piston top land.
And with frequent short city trips, when the engine does not have time to warm up or when saving on oil service, piston rings lie on the 2.0 CRDI engine.
