Replacement of Bosch atomizer injectors. Repair and causes of failure of diesel injectors

Nozzles repair of diesel engine with your own hands: 3 causes and 6 signs of failure of the part

In the process of operation of the diesel engine the efficiency of fuel atomization gradually decreases. At a certain stage it is necessary to repair or replace the injector nozzle and sometimes the whole injector. You can do it yourself without the need for costly auto service.

One of the basic elements of any fuel system, including Common Rail (CR), is the injector, whose main function:

The part of the injector from which fuel is injected is called the atomizer. Its leading edge is in the combustion chamber and is constantly subjected to mechanical and thermal stress.

The nozzle is cooled as the fuel flows through the nozzle, but this may not be sufficient over long periods of operation. Therefore, the nozzle tip is made of high-temperature-resistant materials.

In the CR system, the spray tip is integrated into the nozzle. this increases its service life.

Types of injector nozzles

The high-pressure fuel pumps (HPF) of the inline, distributor, and custom types have nozzle nozzles that are threaded into the injector. As a result, the nozzle is an integrated unit.

Repair of diesel engine injectors with your own hands: 3 causes and 6 signs of failure of the part

In-line multi-plunger, singles and distributor injectors use sprayers with threaded nozzles

CR fuel systems or pump injectors have integral (assembled) nozzles. Distance-controlled engines have stud nozzles and direct injection engines have nozzle nozzles.

In the common rail system the spray bodies are built into the injectors

Nozzle operating principle

In the CR system, the nozzles are controlled by the electronic control unit (ECU), which sends specific signals to the nozzles. This is what makes the SR different from the mechanical system, where the injectors open when a certain pressure is reached.

Electro-hydraulic nozzles also open when the fuel pressure rises. However the atomizer needle has a rim that is used as a piston. The fuel supply is high pressure, both above and below the piston.

As the pressure is equal, the needle is pressed against the seat and the nozzle is closed. There is a space (duct) above the needle that connects to the bleed line.

A valve (piezoelectric or electromagnetic) is built into this space, closing the channel during operation.

When the signal from the ECU is applied, the nozzle is triggered. The valve opens, the channel becomes free, and the fuel above the needle flows into the corresponding line.

As a result, a pressure difference occurs and the fuel that is under the needle lifts the spring that opens the atomizer orifice. At this point injection occurs.

In the absence of a signal from the ECU, the pressure stabilizes and the injector closes.

When in working order the nozzle sprays fuel in the form of a cloud. If the fuel is blasting, the nozzle is defective.

Replace the spray nozzle

In the process of operation of a diesel vehicle can be a situation when fuel consumption increases markedly, the engine power is reduced up to complete stopping. Faulty nozzle tips are often the cause. In such cases it is desirable to carry out repair work as soon as possible.

The reason of the decrease in the engine power and increased fuel consumption is often a defective atomizer

Symptoms of a faulty injector nozzle

The following symptoms are an indication that the nozzle needs to be replaced.

  • Fuel is supplied in excessive quantities. It continues to enter the engine even after the cycle is complete. Leaks appear.
  • The engine is unstable, does not start after a long stop and idle speed fluctuates. Cause insufficient fuel in the system.
  • The incomplete combustion of fuel makes the exhaust black and denser.

The engine output will be reduced as a result. In this case the nozzles need to be replaced.

Tools Required

Nozzles are normally screwed into the cylinder head. Do not use a socket wrench to remove them. Even if you can remove nozzles in this way, you will not be able to install them back. it is impossible to perform tightening with a wrench with the required force.

The main part of the nozzle body is a hexagon. To remove them you can use standard sockets 24 and 27 and a screwdriver. They must be elongated. You will also need a container with fuel for flushing injectors.

Procedure for changing a nozzle

After removing nozzles, washers and contaminants are removed from nozzle channels. Washers are pulled out with self-made hooks. After cleaning the ducts be sure to crank the starter for 10 seconds. This will ensure that the ducts are completely free of debris. In addition, it is recommended to check the function of the glow plugs and the control system.

After removing the nozzles, check their performance according to the following criteria:

  • at a certain pressure, the injector has to open;
  • no fuel should leak from the sprayer before opening the nozzles;
  • The atomization should be uniform;
  • the pressure inside the injector must remain unchanged for a period of time when the fuel supply is cut off.

Delphi

This company wanted to get ahead of Bosch and developed a more complicated injector control system. As a result, they have become more demanding on fuel quality, and therefore more likely to break down. With the body, the solenoid and the nozzle, Delphi injectors are the same as the competitor’s. There are other parts that can get “screwed up”.

  • The injector valve is the part that is sensitive to the class of fuel: the worse it is, the faster it wears out. In addition, the contacting parts of the injector during friction produce tiny chips, which also damage the valve. To detect the results of wear and tear, you need a microscope, without it you can not see the flaws.
  • Regulating pin cannot break. However, it is so small that it is often lost by inexperienced repairmen;
  • Parts for Delphi injectors are available on the market, but in some cases they are made to order and the waiting period can vary from a week to a month.

Check the injectors on the car

To determine the faulty injector does not necessarily have to dismantle the entire injection system. Diesel injector diagnosis can be done directly on the vehicle. To do this, follow the instructions below:

  • Start the car engine;
  • By adjusting the engine speed to achieve the most tangible failures;
  • Disconnect the injectors one by one. This requires loosening the cap nut securing the fuel lines;
  • When disconnecting the working injectors there will be changes in the operation of the engine. Disconnecting a faulty one will not affect operation of the engine in any way.

Audible engine malfunctions are an important prerequisite for this test method. If there are other symptoms, such as increased fuel consumption, but visually the power plant is working properly, it will be impossible to detect a faulty injector. In such case it will be possible to check diesel injectors only after their dismantling.

Preparation for removal of diesel injectors from the engine and removal of the injectors

Before you begin repair, it is very important to prevent dirt and small foreign particles from getting into the elements of the power supply system. To do this, it is recommended to first wash the cylinder head with one of the available methods (Kercher, steam cleaning, self-cleaning, etc.).д.), clean the recesses under the injectors and the injectors themselves.

The mentioned actions will help to avoid damage of thread, sealing cone hole and also reduce the possibility of small dirt particles getting inside the internal combustion engine after unscrewing nozzles.

Another important point is the high-pressure tubes. Before removing them it is recommended to mark them, because during the process of reassembly can be difficult with the order of installation and the correctness of the assembly. For marking you can use a marker, marks are made in the area of nozzle connection of each injector and fuel pump connection.

See also  Tools for installing PVC windows. Pen repair and adjustment

On how to do the repair of Common rail injectors with your own hands, see this

We should add that without proper experience and equipment to repair the system common rail in the garage is not recommended, because it can damage some of the expensive elements.

So, back to mechanical injectors.

  • Once the high-pressure tubes are disconnected from the injectors, it is necessary to cover the holes in the fittings with special protective caps. Protective plugs should be cleaned of dirt beforehand, also plugs can be used to protect fuel pump connections.
  • Similarly, each return nozzle is also blocked, as it is impossible for small particles to get into the fuel system. For example, debris in the fuel channel of an injector diesel injector after installing the element on the test bench will penetrate the atomizer.

As a result, the injector needle may already be jammed not on the engine, but during inspection, debris will disable the atomizer, etc.д. If a new injector is installed before this test, it will need to be disassembled again and there is a high chance that the injector will be replaced again. Nozzle itself also should be dismantled only in conditions of maximum cleanliness.

  • As for removing elements from ICE, attempts to unscrew nozzles with an ordinary open-jaw wrench can lead to slipping and damage of edges. The point is that the injectors are tightened to a high torque. For this reason a ring spanner is needed for unscrewing, and an extended socket is also advisable.
  • Once the nozzles are unscrewed, it is recommended to perform their external cleaning from contamination once again. This cleaning is done with a normal soft brush, using clean diesel fuel as a cleaner. After that injectors are dried or wiped with a rag and then the device is ready for diagnostics and repair.
  • We should also note that after removal of the injectors themselves in the cylinder head there are special O-rings. These sealing rings of injectors are in grooves-nishas and, as a rule, are stuck to the holes in the cylinder head. These rings should be removed and replaced with new ones, as it is not recommended to reuse these elements.

To extract it, you can use a small piece of thin metal wire to gently pull out the rings. The main task is to avoid damaging the thread in the injector hole.

Do not tap out the rings with steel spacers, screwdrivers, etc.п. The reason is that there is a great risk of damaging the O-rings’ seats. If this happens, then even after replacing the rings with new ones, the proper tightness will not be achieved.

  • Also note that when the rings are removed, dirt can get into the nozzle holes. To prevent this it is necessary to coat the hole with a viscous grease, after which the ring can be removed. Often Solidol or a similar lubricant is used for such purposes. Crumbling dirt adheres to the grease and does not get into the combustion chamber bore.

When the ring removal procedure is complete, the Lubricant can also be removed, e.g. by using a soft cloth that is wound around a rod or screwdriver. It is also possible to turn the engine crankshaft with the starter for a few seconds. This is so that dirt that has entered the combustion chamber is pushed outward by the piston.

On how to do the repair of nozzles Delfi your own hands, see this

Note that although the repair process of Delphi nozzles resembles the usual mechanical nozzle repair, a number of design differences involves some nuances.

Repair of Bosch diesel injectors with your own hands

In detail: Repair of Bosch diesel injectors with your own hands from the real master for the site olenord.com.

In the conditions of general progress diesel vehicles are in great demand. Modern diesel engines are characterized by Common rail fuel systems. Its high performance and environmental friendliness has been confirmed by more than one study. Quality repair of injectors of this type. not an easy task, which can be performed by true professionals.

The injector itself is an electromagnetic valve. Its purpose: the injection of a metered amount of fuel, necessary for the preparation of the combustible mixture in different modes of operation of diesel engines. The amount of fuel injected into the coil of the injector solenoid depends on the duration of the electrical pulse. In the engine cylinder itself, fuel injection is synchronized with the position of the piston.

Injection starts with an initial needle lift which conveys a small quantity of fuel into the combustion chamber. A further increase in injection pressure raises the nozzle needle fully, so the main injection proceeds.

The purpose of two-stage injection is to provide a softer combustion process and reduce noise.

Bosh, the market leader in diesel fuel injection systems, has developed the Common Rail system. Its main characteristic is an injection pressure of up to 2,500 kgf/cm2. whose maximum value is not created in the accumulator but in the injector itself. Common Rail is equipped with:

  • A miniature hydraulic pressure booster;
  • two solenoid valves, allowing to vary within one working cycle from the amount of fuel to the moment of injection.

Fuel injectors and repair kit of another sample of this company have a device in the form of a small pressure tank, whose task is to reduce the back flow to the low-pressure cycle. As a result the injection pressure and efficiency of the system increase.

Directly at the factory, each Bosch diesel injector body and repair kit is put to the test period. In addition, they are subjected to increased loads in order to minimize the probability of breakage. In practice, the parts from the manufacturer have exceptional precision atomizers on both trucks and cars.

Use the services of professional companies, if observed:

  • Increase of fuel consumption with the same operation mode;
  • appearance of increased smokiness and extraneous noise;
  • Decrease of diesel power output;
  • Difficulty starting the engine.

Usage of low-quality fuel and engine oils in the majority of cases is a major factor of nozzle failure. The entire fuel system can be damaged by impurities or water in the fuel. The fact that a minimum amount of water at high temperature and pressure, easily fails the nozzle and the repair kit, responsible for injection and atomization of fuel. Final diagnosis: repair or replacement of the repair kit is required.

Make sure the service center is up to the job before you start the repair:

  • All necessary equipment and tools are available for diagnosis and adjustment.
  • Only experienced, qualified technicians are on staff.
  • Manipulations are performed in accordance with the manufacturer’s recommendations.
  • Provides testing on special test benches.
  • Parts are repaired with a multi-step quality assurance inspection by several professionals.
  • A warranty is issued for the work performed.

In diesel vehicles, injectors are given the role of an important functional unit. Repair and its quality is responsible for the further efficiency of the entire system. A computer diagnostic is usually required before this, the correctness of which will serve as a guarantee of successful resolution. The main task of the stage is to identify the true cause of poor engine performance before removing the injectors.

Based on the results, experienced specialists already have a rough idea of. The condition inhibited implies a total repair, but there may be minor faults, which a new repair kit will solve.

The final diagnosis shows compliance with the manufacturer’s initial data in the adjustment of parameters:

  • quality of fuel atomization;
  • Injection start pressure;
  • back leakage;
  • the tightness of the shutoff valve body;
  • mechanical wear of the atomizer, etc.

Since the injectors and its repair kit are the most vulnerable place, it is recommended to owners of diesel cars to have a routine diagnosis of the diesel. Thereby we extend their service life.

Repair of diesel engine belongs to the type of complex works. It is important to fix all the problems that are not only related to the work of diesel injectors, but also with other types of their injection by.

The diesel engine is highly susceptible to low-quality fuel or oils. This factor is often the cause of failure. Cleaning the parts with special equipment is also a repair. In this case a new repair kit may be necessary, as some parts may have time to break down.

It is important to know the producer of these elements, the repairability of which is determined on the basis of their characteristics. For example, diagnostics on the stand showed spray pattern violation Bosch79. In such a case, both the nozzle and the atomizer itself must be replaced.

See also  How to make a shovel for a single-axle tractor

The same manufacturer offers a special repair kit, which includes sealing rings. Their damage or wear also negatively affects the functionality of the diesel system. Complete repair of injectors is necessary in case of breakage of a component part, which cannot be repaired.

Repair of Bosch diesel injectors with their own hands

In detail: repair of Bosch diesel injectors with your own hands from a real master for the site olenord.com.

In the context of universal progress, diesel cars are in great demand. Modern complete set of diesel engines is characterized by Common Rail fuel system. Its high performance and environmental friendliness has been confirmed by more than one study. Quality repair of injectors of this type. not an easy task, which can be performed by true professionals.

The injector itself is an electromagnetic valve. Its purpose: injection of a measured amount of fuel required for the preparation of the fuel mixture in different modes of operation of diesel engines. The amount of fuel flowing into the coil of the injector solenoid depends on the duration of the electrical pulse. In the engine itself, the fuel injection is synchronized with the position of the piston by a nozzle.

The injection process starts with an initial needle lift which conveys a small quantity of fuel into the combustion chamber. A further increase in injection pressure raises the nozzle needle fully, so that the main injection proceeds.

The purpose of two-stage injection is to provide a smoother combustion process and to reduce noise.

Bosh, which is the leading manufacturer of diesel fuel injection engines, has developed the Common Rail system. Its main feature is the injection pressure up to 2,500 kgf/cm2, the maximum value of which is created not in the hydraulic accumulator, but in the nozzle itself. Common Rail is equipped with:

  • miniature hydraulic pressure intensifier;
  • two solenoid valves, allowing to vary within one working cycle from the amount of fuel to the moment of injection.

Fuel injectors and repair kit of another sample of this company have a device in the form of a small pressure tank, whose task is to reduce the back flow to the low-pressure cycle. As a result, injection pressure and system efficiency increase.

Directly at the factory, each Bosch diesel injector body and repair kit is put to the test. In addition, they are subjected to increased loads in order to minimize the likelihood of breakdowns. In practice the parts from the manufacturer possess exclusive precision of atomizers both on trucks and cars.

Use the services of professional companies if observed:

  • increased fuel consumption with the condition of the former mode of operation;
  • Increased smokiness and unusual noise;
  • A decrease in diesel power output;
  • Difficulty starting the engine.

Use of low-quality fuel and engine oils in most cases is a major factor of injector failure. The entire fuel system can fail through impurities or water in the fuel. The fact that a minimum amount of water at high temperature and pressure conditions, easily fails the injectors and the repair kit, which are responsible for injection and atomization of fuel. Final diagnosis: repair or replacement of the repair kit required.

Before you start any repair work, make sure the service center is up to the job:

  • All necessary equipment and tools for diagnostics and regulation are available.
  • Only experienced, qualified technicians are on staff.
  • Manipulation is carried out in accordance with the manufacturer’s recommendations.
  • Testing on special test benches is available.
  • Repair of parts is accompanied by multistage quality control checks, conducted by several specialists.
  • Guarantee for work performed.

In diesel cars the role of injectors is given to the important functional unit. Repair and its quality is responsible for further efficiency of the entire system. As a rule, a computer diagnostic should be performed before this, the correct execution of which will be the key to a successful resolution. The main task of the stage is to identify the true cause of poor engine performance before removing injectors.

On the basis of the results obtained, experienced specialists already have a rough idea of. The running state implies a total repair, and there may be minor problems, which can be solved with a new repair kit.

The final diagnosis shows compliance with the manufacturer’s initial data in adjusting the parameters:

  • The quality of fuel atomization;
  • Injection start pressure;
  • back leakage;
  • tightness of the shut-off housing;
  • mechanical wear of the atomizer, etc.

Since the injectors and its repair kit are the most vulnerable place, diesel car owners are advised to have a routine diagnosis of the diesel. In this way we extend their service life.

Diesel engine repair is of the complex type. It is important to eliminate all malfunctions, which are not only related to the work of diesel injectors, but also with other types of injection by them.

The diesel engine is highly susceptible to low-quality fuel or oils. This factor is often the cause of failure. Cleaning the parts with special equipment is also a repair. In this case, you may need a new repair kit, as some parts may have time to fail.

It is important to know the manufacturer of these elements, the repairability of which is determined on the basis of the characteristics. For example, diagnosis on the bench showed a violation of the spray pattern Bosch79. In this case, you need to replace both the nozzle and the atomizer itself.

The same manufacturer offers a special repair kit that includes o-rings. Their damage or wear also negatively affect the functionality of the diesel system. Full restoration of injectors is necessary under condition of breakage of a component part which repair is impossible.

Repair common rail injectors with your own hands pours in the return

Details: repair of common rail injector with his hands pours into the back of the real wizard for the site olenord.com.

In the pursuit of perfection you choose the best. AS8 Club. who made their choice.

After reading a lot and talking to smart people we got to work. May be somebody may want to know how it works Report is taken here: http://ru.full-repair.com/technics-repacleaning/

A video demonstration of Common Rail injectors

Now let’s proceed to reassembly If after reassembly the injectors are not immediately installed in the engine and running, all parts need to be lubricated. It is better to lubricate with their fluid, if it is not possible, then at least with something, e.g. a liquid wrench. This is to keep the dry parts inside from rusting.

Nozzle is perfectly cleaned and assembled, ready for action. But its exact working condition can be shown by the test bench, which I did. Nozzle works like new. test bench verdict

As a result, we get the result in cash equivalent of 4000, or better a new one for 25000

Since nothing lasts forever, some parts of the injectors may fail, for example a needle in the atomizer may get stuck and I really don’t know how to get it out without damaging it. The valve seat with the ball can wear out, the valve-multiplier pair can wear out as well. In this case it is possible to order parts, here are the codes that we can score in exist

Although modern diesel engines are becoming more complicated, the Common Rail system from the technical side seems to be even simpler than previous systems with a mechanical injection pump. Eventually, the Common Rail system completely displaced competing solutions from the market, such as pump injectors.

In cars, several types of Common Rail systems are used. Simplified, they can be divided into two types (electromagnetic and piezoelectric) and four manufacturers (Bosch, Continental, Delphi, Denso). Bosch, Delphi and Denso are well-known manufacturers of car electronics. Bosch has been developing injection systems since the beginning of the last century. Delphi bought the technology for diesel fuel injection from Lucas. Japanese Denso gained experience working together with Bosch and Magnetti Mareli. Continental bought Siemens and VDO, becoming the main competitor of German Bosch. Injectors of this company are marked with the Continental logo for about a year, earlier they used to carry the Siemens logo.

The most universal is the market leader. Bosch, which produces both types of injectors: electromagnetic and piezoelectric. On a much smaller scale, both types of injectors are produced by Delphi and Denso. Continental (Siemens) is limited exclusively to piezoelectric technology.

See also  Replacement of the fuel pump on the centaur motoblock

Every wader praises his own swamp.

In advertising booklets every producer praises his product as the best solution. As you have already guessed, in practice many of them often have a number of shortcomings. The simplest design have electromagnetic injectors from Bosch. Repair of German injectors is not complicated. Delphi wanted to go further and developed for their electromagnetic injectors is much more complex control system. As a result, its product has been found to be the most sensitive to fuel quality and, unfortunately, not very durable. Among electromagnetic injectors the most reliable are considered Denso, but there are difficulties with the availability of spare parts for repair. The most balanced are considered to be piezoelectric injectors designed by Bosch and Siemens (Continental), and partly Denso. Nozzles are similar to each other, both technically and in terms of reliability. The only exception to this group is Delphi, whose piezo injectors have always been known to be less robust.

Whose injectors can be repaired?

In terms of repair capability, the most preferred turbodiesels with a classical Common Rail injection company Bosch. With the restoration of this type of injectors can handle almost all specialized centers. But the final result depends on the diligence and honesty of the craftsman. Electromagnetic injectors Delphi also amenable to repair, but require replacement of the tip and the coding of the injector after repair. It increases repair costs, but without coding, the engine will run with interruptions. Denso electromagnetic injectors are one of the most durable, but repair is possible only if spare parts are available. But all is not well with this.

Delphi and Bosch piezo injectors are considered unrepairable. In the case of Siemens (Continental) there are injection tips that allow resizing, which makes it possible to restore the performance of the injector. However, this only applies to some models with PSA 2 engines.0 HDI 16V. Various modifications of this turbodiesel are used in Ford Mondeo IV, Focus, Galaxy, S-Max and Volvo S40, S60.

What to watch out for?

Advantages and disadvantages of injectors should be known at the stage of choice of car. Given the risk of injector failure, two models with the same engine should be avoided as fire: the Ford Mondeo III 2.0 TDCi and Jaguar X-Type 2.0 d. Mercedes E250 CDI W212 early production injectors also had congenital defects. The other cars with Delphi injectors do not give me any cracks. Some engines allow injectors from different manufacturers. For example, the engine 1.6 HDi/TDCi had four different types of injection systems, and the cheapest to service was Bosch. Similar situation with 2.0 HDi. Siemens (Continental) injectors can be repaired, but Bosch piezo injectors cannot.

What you should know about Common Rail injectors.

Common rail injector repair with your own hands flows into the return

Details: repair of common rail injectors with your own hands pours in the return from the real master for the site olenord.com.

In the pursuit of perfection you choose the best. AS8 Club. the ones who made their choice.

After a lot of reading and chatting with smart people we got down to work. Maybe someone will need the principle of work The report is taken here: http://ru.full-repair.com/technics-repacleaning/

Here is a video about Common Rail injectors at work

Now let’s proceed to assembly If after assembly the injectors will not be set in the engine and put into operation immediately, all parts should be lubricated. It’s better to use with diesel. their native liquid, if you can not, then at least something, a liquid wrench for example. This is to keep the dry parts inside from rusting.

The injector is perfectly cleaned and reassembled, ready to fight. But its exact working condition can be shown on the test bench, which I did. Nozzle works like new. test bench verdict

Since nothing lasts forever, and some parts of the injector can come to an end, for example, can stick a needle in the atomizer and I really do not know how to get it neatly without damaging. The valve seat with the ball may be worn out, also the valve-multiplier may be worn out. In this case you can order parts, here are the codes that we can find in the existe

Although modern diesel engines are becoming more complex, the Common Rail system from the technical side seems to be even simpler than previous systems with a mechanical injection pump. As a result, the Common Rail system has completely ousted from the market competing solutions, such as pump injectors.

Several types of Common Rail systems are used in passenger cars. Simplified, they can be divided into two types (electromagnetic and piezoelectric) and four manufacturers (Bosch, Continental, Delphi, Denso). Bosch, Delphi and Denso are well-known manufacturers of car electronics. Bosch has been developing injection systems since the beginning of the last century. Delphi technology for diesel fuel injection bought from Lucas. Japanese Denso gained experience working with Bosch and Magnetti Mareli. Continental bought Siemens and VDO, becoming the main competitor of German Bosch. Nozzles of this company have been marked with Continental emblem for about a year already, earlier they were marked with Siemens logo.

The most universal is the market leader. Bosch, which produces both types of injectors: electromagnetic and piezoelectric. On a much smaller scale, both types of injectors are produced by Delphi and Denso. Continental (Siemens) limits itself to piezoelectric technology.

Every hen praises his own swamp.

In advertising booklets, each manufacturer praises their product as the best solution. As you have already guessed, in practice many of them often have a number of shortcomings. The simplest design have electromagnetic injectors from Bosch. Repair of German injectors is simple. Delphi wanted to go further and developed a much more complicated control system for its electromagnetic injectors. As a result, his product was the most sensitive to fuel quality and, unfortunately, not very durable. Among the electromagnetic injectors are considered the most reliable Denso, but there are difficulties with the availability of spare parts for repair. The most balanced are considered to be piezoelectric injectors of Bosch and Siemens (Continental) design, and partly Denso. Nozzles are similar to each other, both technically and in terms of reliability. The only exception to this group is Delphi, whose piezo nozzles have been known for a long time to be less robust.

Whose injectors can be repaired?

In terms of repair capability, turbodiesels with Bosch’s classic Common Rail injection are the most preferable. With the restoration of this type of injectors can handle almost all specialized centers. But the final result depends on diligence and honesty of the master. Electromagnetic injectors Delphi also amenable to repair, but require replacement of the tip and injector coding after repair. This increases the cost of repair, but without coding the engine will run intermittently. Denso electromagnetic injectors are some of the most durable, but repairs are only possible if spare parts are available. But all is not well with this.

Piezo injectors Delphi and Bosch are considered unrepairable. In the case of Siemens (Continental) there are injection tips that allow to change the size, which makes it possible to restore the performance of the injector. However, this only applies to some models with PSA 2 engines.0 HDI 16V. Various modifications of this turbodiesel are used in Ford Mondeo IV, Focus, Galaxy, S-Max and Volvo S40, S60.

What to look out for?

Advantages and disadvantages of injectors should be known at the stage of selecting a car. Taking into account the risk of failure of injectors, two models with the same engine should be avoided as much as possible: Ford Mondeo III 2.0 TDCi and Jaguar X-Type 2.0 d. The Mercedes E250 CDI W212 was congenitally defective at the beginning of production. The other cars with Delphi injectors have no complaints. Some motors allow the use of nozzles from different manufacturers. For example, engine 1.6 HDi/TDCi had four different types of injection systems, and the cheapest to maintain was the Bosch. The situation is similar with 2.0 HDi. Siemens (Continental) injectors can be repaired, but Bosch piezo injectors can not.

What you should know about Common Rail injectors.

Related Posts

| Denial of responsibility | Contacts |RSS