How to remove the injectors?

Answer 1.

There is nothing terrible there. There are several nuances, I will try to describe from memory (I shot it last year, I could have forgotten something). If anything, Leo will correct, he has more experience. From what you should pay attention to.

Carefully with latches on the fuel supply and return lines. They are plastic, it will be a pity if they break.
It is advisable to change the O-Rings (sealing rings on the injectors) when removing - installing injectors. If my memory serves me, then they may be different in color (they have different temperature conditions) - those that enter the intake manifold and those that are in the common rail. It would be better not to confuse them in places.
Why is it better to install new ones? Americans generally advise, at any work, to change all rubber bands that come across on the road over three years old - their labor costs much more than these rubber bands. If it then flows again, you will have to disassemble it. Those rings that enter the common rail (the fuel line that feeds directly to the injectors) must keep the tightness against fuel leakage to the outside. Below the intake manifold on our resin block is the exhaust. It will be very disappointing if the car lights up because of the kopeck piece. However, we live in Russia and everything that is needed in science is not always fair in our country, therefore, for example, I checked visually and by touch the condition of the rings and put the old ones (but what to do?).
To remove the common rail, you have to remove the throttle, kickdown and cruise control cables. Be careful with their tips - some can be easily broken and although it's not very scary - it's still a shame.
The kickdown cable will need to be adjusted later. It is advisable to thoroughly wash the engine from the side of the injectors before disassembling. otherwise, dirt may fall into the intake manifold.
In my opinion, it is better to shoot with a unit - rail injectors. It is normal for the injectors to come out of the nozzles with a fairly large effort.
It makes sense to prepare the vacuum cleaner in advance and, after removing the nozzles, collect the debris (washing the motor, unfortunately, does not remove everything).
When disconnecting the injectors, do not forget that the connectors are fastened with spring brackets.
And it would be better to disconnect the battery before disassembling.
I also ask you to keep in mind that, as I already wrote, I have so far tried THF only against external contamination. Then I will let you know what they achieved when flushing from the inside.
Yes, if the engine is already running unevenly, it would be a good idea to first unscrew the spark plugs and see their condition. Pay special attention to injectors from those cylinders in which the candles differ sharply from the rest.
It is advisable to carry out the work clean. Although an additional filter is installed in the inlet of the injector, any dirt is highly undesirable. Can bring in such that then it will not be rinsed at all.

The injector is an electromagnetic device in the engine power system, which is responsible for metering the fuel supply to the intake manifold. Due to the high temperature and poor quality of the fuel, during operation, formations with a varnish-like structure can form inside the injector. As a result, it opens poorly, which negatively affects engine starting and its power. To ensure the throughput of the injector, and therefore the optimal operation of the entire engine starting and control system, it is necessary to get rid of contamination. Definitely before taking on this important task, the nozzle must be removed.

If you feel strong and enthusiastic with my own hands to dismantle the fuel injectors, it makes sense to heed the advice. Lovers personally perform all manipulations with own car say that you need to prepare: sets of screwdrivers, wrenches, power pliers with a lever and a lock, a carbocliner and rags. If you want to perform the operation of removing this device effectively and correctly, you should adhere to a certain order of its implementation. So let's get started. First of all, the fuel rail is removed along with all the injectors, then, while simultaneously clamping the spring clip, the wiring block is disconnected. A screwdriver is taken, with which the latch is shifted along the ramp. Then the nozzles are removed from the ramp, which scrolls slightly at the same time. Next, using a flathead screwdriver, you need to get rid of the O-rings located on the body of the electromagnetic device and the spray. It is advisable to replace them with new ones. Owners of cars equipped with diesel engines may have particular difficulties in removing the injectors. This is due to the specifics of the body structure and the engine itself: when moisture gets in, the injectors stick to the cylinder head. It is best to dismantle such nozzles using special equipmentso as not to lose a large number of time for milling, welding and replacement of consumables. You can spend a lot of money on all this, but you still can't achieve the desired effect. It happens that it is necessary to sacrifice all the injectors, remove the cylinder head and drill out the faulty parts. Note that the fuel injectors work with high pressure. An unexpected jet of fuel from an injector nozzle can cause unsafe consequences and cause serious damage skin. Therefore, when performing any actions with a device under pressure, be on the lookout, taking care that the jet of fuel does not splash in your direction. If possible, have a professional check the pressure in the fuel system. If you take on this business on your own, take precautions. Please note that fuel injectors have a fairly long service life. Perhaps there is no need to dismantle them at all. How to decide in this case? To establish the feasibility of replacing injectors, first pay attention to the mileage. If it has reached a mark above 100 thousand kilometers, it probably makes sense to check. Contact a good specialist so that they perform quality testing, disassembly and calibration of injectors in your car. Do you suspect faulty fuel injectors are causing the smoke and knocking sounds? The reason can be established without disassembly. To do this, you will need to lower the clamps and briefly remove the air duct located in the area of \u200b\u200bthe air cleaner and intake manifold. When you remove the plastic cover from the top of the engine, fix the air duct to its original position and tighten the clamps. Now is the time to start bringing the engine to high speed idle move... And then carefully loosen the tightening of the fittings in turn, do it carefully, it is advisable to cover the adjacent area with rags. As a rule, when the fitting of the faulty injector is turned off, the knocking and smoke disappear.

Now we know everything about the technology for removing and cleaning injectors. These simple rules will help you to independently carry out repairs, which at any service station will be quite expensive. The technology does not depend on the type and volume of the engine and is suitable for any car model.

The small parts that have a huge impact on engine performance are injectors. As a result of work, they tend to clog, which leads to the need to clean them, and sometimes replace them. However, removing the injectors from the engine is not an easy task. Specialists of our company Diesel-sever will help you to cope with it.

Why is it so difficult to dismantle injectors

There is some gap between the fuel nozzles and the spark plug. Over time, moisture gets into it, which causes the injector to stick to the cylinder block. This process leads to the fact that it becomes almost an integral part of it. In this case, it is very difficult to dismantle the nozzle.

On diesel engines, this problem is even more urgent. As a result of the burning out of the copper washers under the influence of combustion products, the nozzles are practically welded to the engine block. Removing the diesel injectors yourself without damaging them is practically impossible in this case.

When attempting to remove fuel injectors, it is extremely important to remember that there is a high risk of damage to the engine head itself. Therefore, it is unacceptable in such cases to try to remove them yourself. To remove the nozzles, you must contact a specialist.

What if she got used to it?

To prevent such a nuisance from happening, it is necessary to monitor the condition of the engine and its parts, to dismantle the injectors every 50,000 kilometers. Lubricate them before installation with non-stick paste, and clean their threads. However, if such prevention did not help, and they still stuck, then you need to immediately contact qualified specialists, that is, to us.

We carry out quick and high-quality removal of diesel injectors. For many organizations, a serious problem is the removal of 4 and 5 injectors from such cars as SSang Yong Cayron, Rexton, Action, but we dismantle them even without the need to remove the cylinder head and hood.

Such broad capabilities of our organization are associated with qualified personnel and the latest functional technical base that we have. By contacting us, you will be able to remove the fuel injectors, while ensuring that the integrity of the cylinder block is preserved. Moreover, thanks to innovative approaches, after their dismantling, there is a high probability of restoring these parts.

(injectors, fuel lines, pressure regulator, intake valves, fuel rail). First of all, it depends on the quality of the fuel, which has recently become higher, but it is still far from foreign analogues. By the way, high-quality fuel contains additives that clean the engine combustion chamber and prevent contamination from accumulating in the entire fuel system.

Functions, types and principle of operation of fuel injectors

Main function injectors in any car - this is to ensure dosed and timely introduction of a gasoline or diesel mixture into the engine combustion chambers. Depending on the fuel injection method used, all currently existing injectors are divided into three types:

Electromagnetic nozzles. Apply on gasoline engines internal combustion, also with direct injection. This type of nozzle is considered the simplest.

Electro-hydraulic nozzles. They have a more complex executive device. Used on diesel engines.

Piezoelectric nozzles. They are more advanced. These injectors are installed in the latest injection engines Common rail ("Common ramp").

Have fuel injectors there are significant advantages over other cooking systems fuel mixture, thanks to this they have become widespread in modern engines... These advantages allow the motor to increase power and environmental friendliness, making it easier to start in different weather, and simplify maintenance.

The use of poor quality fuel in the injection system can cause major problems. Repairing injectors or replacing them will be very expensive. Hence the relevance of the problem under consideration: how to remove the injectors and replace them with new ones yourself.

The operation of the fuel injectors can be divided into four stages:

1. The nozzle is closed, but pressure is applied;

2. When the injector is opened, fuel injection starts;

3. The nozzle is fully open;

4. The injector closes and fuel injection ends.

Reasons for the inoperability of injectors

Currently, injectors are produced with high quality machining, for example, with a hole tolerance of 1 μm, which allows them to do about a billion cycles. The main factor affecting their performance is contamination during operation, even despite the fact that the way to any contamination is blocked by filters filtering out particles larger than 10-20 microns.

Filters are installed in the place where the fuel line and a nozzle. main reason pollution consists in the inevitable presence of heavy particles in the fuel. Most of the dirt accumulates when the engine is turned off. At this time, due to the fact that the engine heats up the nozzle, the temperature of its body rises, and the cooling effect of the fuel is absent.

Light particles of fuel in the nozzle evaporate, while heavy particles are deposited as varnish deposits, making the cross section in the calibrated channel smaller. For instance, deposits with a thickness of 5 µm reduce the throughput of the channel by about 25%. Clogging of the holes in the injectors interferes with the creation of the fuel mixture, the impermeability of the shut-off valve of the pressure regulator is lost, and the high-pressure fuel pump for diesel engines reduces its performance.

Fuel Injector Malfunction Symptoms

- Difficulty starting the motor;

Interruptions in the functioning of the engine at idle and transient modes;

Dips during very sharp pressing;

The power of the motor decreases and the dynamics of acceleration are noticeably worse;

Increased fuel consumption;

Toxicity exhaust gases increases;

Detonation created during engine acceleration due to an increase in temperature in the combustion chamber;

Misfire;

Clap formation in the exhaust system;

Malfunction of the sensor that monitors the oxygen level, and breakdown of the catalytic converter.

When winter comes, and with it low temperature air, the malfunction of the injectors becomes especially noticeable - a cold engine rarely starts immediately. There are two methods for cleaning fuel injectors:

1. Cleaning the injectors without removing them from the motor;

2. Cleaning of nozzles on an ultrasonic rack with their previous removal.

The second method is considered more effective than cleaning without removing the nozzles. However, with the first method, not only the nozzles are cleaned, but also other parts of the system: the rail, inlet and shutoff valves, the high pressure pump, and so on. If you contact the station to specialists for cleaning, then it will come out to you in a small amount. But for some domestic cars and foreign cars, it will be more profitable to install new injectors than cleaning old ones.

Procedure for replacing fuel injectors:

1. We relieve the pressure in the fuel supply system. To do this, the relief valve must be removed. If the relay is removed fuel pump or its connector, you need to start the motor and wait until it stalls.

2. De-energize electrical devices machine, for which disconnect the battery terminals.

3. Disconnect the fuel supply line from the rail with fuel injectors.

4. We dismantle the connectors from the fuel injectors. We unscrew the bolts securing the ramp.

5. We remove the rail and fuel injectors.

6. And disconnect the fuel injectors from the rail.

7. Then we install new nozzles. And in case of cleaning, remove the O-rings from all nozzles and discard them.

Before starting to install everything back, it is necessary to put on new O-rings on the nozzles. You also need to lubricate the rings and injector seats with new engine oil... Installation is carried out upside-down. At the end of the installation, we carefully examine the fuel system and make sure that it is completely tight.

Getting knowledge and skills

Approaching the replacement of injectors, you need to have a certain baggage of knowledge that will help you carry out all necessary work error-free and without new faults. On the Internet, you will find a wide variety of videos with the technology of repair and replacement of injectors for various car models. In case you find required material did not work, you need to focus on the type of injection system used. With a similar location on the motor, the attachment points and joints will also be similar.

A video on demand "how to remove injectors" on a similar device can certainly help you solve your problem. When carrying out repairs on your own, it is very good to have near you detailed descriptionwhere all necessary information about the sequence of actions, the peculiarities of their implementation and necessary tool and devices. These guides can still be found on the Internet, but not always in Russian.

What nozzles to use for replacement

The most famous manufacturers of fuel injectors for various injection systems of gasoline and diesel engines firms are considered Bosch and Delphi. In the absence of the possibility of purchasing and installing original parts on the machine, purchasing the products of these companies will be the best option.

Common Rail engine injectors sometimes need to be cleaned, repaired or replaced. To do this, they must be removed from the engine. How I did it, I'll tell you in this article.

Before you start. Important.

Some injectors have correction codes for the amount of fuel injected. Therefore, before removing, it is advisable to find out if your nozzles have them. If or not they have the opportunity to obtain such information, then it is better to remember which injector was where, it will not be worse, and if there are no such codes, then the installation locations are not fundamental, as in my case.

Looking under the hood, we will most likely see a plastic dust and heat shield.

It is held in place by four screws. We unscrew them, remove the casing. Now we see the engine itself.

First, open the relay and fuse box under the hood and pull out the fuel pump relay. This is so that diesel fuel does not flood the engine and the floor, if you suddenly need to turn on the ignition.

Then disconnect the electrical connectors of the injectors.

Pull out the retaining brackets that secure the return hose connections.