What mileage is changing the timing chain. Advantages and disadvantages of the timing chain: Strong and weaknesses of the chain engine

30.06.2020

From time to time, any mechanism of the car fails, as a result of which its urgent replacement is required. In the case of a chain (belt) of the gas distribution mechanism, bring to extremes very undesirable, since in many cases the gap of this element can easily lead to the need for overhaul power aggregate vehicle. The fact is that the timing chain holds back the pistons and engine valves from the meeting, and if this barrier disappears, the blow will lead to the deformation of the parts, which naturally will break the work of the entire system. After breaking the chain to restore car Motor It is very difficult, and in some cases it is simply impossible. Therefore, you should be aware of the signs of approaching this moment and about the features of the implementation of the part.

1. When you need a replacement chain timing chain

The chain (or belt) of the gas distribution mechanism of any car is a certain relationship between and that are responsible for the work of the valves. Once popular and for a while forgotten, today it leads over the belt, since it combined everything top Qualities Gear and belt transmission:

- reliability and relatively large wear resistance;

Working silent;

Resistance to sharp temperature differences.

True, there are disadvantages expressed in strong tension. So, after some time the chain itself, and the gears, for which it stretched, can be wary, which will significantly affect the operation of the power unit (and its repair is a very not much notable service). At some point you will need to replace the chain, with which, in the presence of required tools, manual for the operation of the car and the reserve of patience, you can cope on your own.

Most manufacturers do not indicate accurate chain replacement timeouts (which you can not say about the toothbrows), and its condition has to be recognized by characteristic symptoms. Often, strong wear is manifested in increased noise and shift phases of gas distribution(Determined using a special diagnostic computer). However, experienced motorists easily recognize a malfunction and other manifestations. For example, individual power units allow you to estimate the status of the timing chain on the outlet of the tensioner rod.

You can also conduct a preventive inspection (and needed) already after 100,000 km of run, and the need for replacement is determined by the power of the chain tension. More details can be considered by phases. If the label of the bearing housing does not match the stamp of the asterisk, or the Schole sleeve detected - immediate replacement is required.

2. The process of replacing the timing chain

At first glance, in conducting self-substitution The timing chains is not difficult: just need to remove the old item and install a new one. But in practice, everything is not so simple. The main point to which attention should be paid is the exact coincidence of the labels, otherwise their slope easily can cause a vehicle breakdown. Therefore, performing a replacement yourself, try to clearly follow the instruction manual, in order to avoid the possibility of damaging the parts of the power unit and more serious problems with the vehicle. However, the complete lack of knowledge and skills in the field of automatic repair can lead to sad consequences.

Those motorists who still decided to risk and replace the timing chain on their own, you need to know the actions algorithm and have a corresponding set of tools. So, with regard to the latter, you will need for a qualitative replacement procedure:

- a set of wrenches and end keys (heads);

Dynamometric key (retainer distribution Vala);

Crankshaft puller and gear puller;

Screwdriver Set;

Set of glands;

Hammer and displacement;

Light stroboscope;

Silicone sealant;

Lubricant / oil;

Gasket for the timing chain cover;

New timing chain and gears;

Degreasing engine for the engine;

Capacity for draining liquid;

The replacement chain itself consists of two interrelated parts: disassembling the engine and its back assembly, naturally, with new details.

Engine disassembly includes the following steps:

1. First, find the instruction manual (need to disassemble and back to collect various details).

2. Then carefully clean the motor with a degreaser and determine the ignition order of your machine.

3. Also make sure that the first cylinder is raised (pull the candle and insert a screwdriver into the hole, the piston should be near the screwdriver head).

4. Disconnect the car's battery cables and remove the radiator cover (only first make sure it is not hot).

5. Drain the antifreeze in the prepared pre-tank and remove the radiator hoses.

7. Remove the fan and water pump;

8. Remove the timing chain cover;

9. Find the note on the old chain and the same mark on the gear teeth.

10. Machine the engine until the labels are leveled.

11. Apply a new label on both chains (scratch the screwdriver).

12. Remove the chain before weakening the gear mechanism.

On this, the first part of the operation to replace the timing chain ends and you can go to the second - engine assembly.

The sequence of action in this case is as follows:

1. To begin with, before installing a new chain, lubricate lubricant (oil) gears.

2. Install the item on the gears, aligning them with marks.

3. Install the corresponding mounting bolts on the camshaft gears and tighten them according to the requirements described in the car's operation manual.

4. Select the crankshaft gland using a punch and hammer for this.

5. Install a new gland in the timing cover.

6. Lubricate oil oil.

7. Back Install the timing chain cover.

8. Install water I. fuel pumps, fan and its clamps.

9. In accordance with the requirements of technical documentation, fill in the radiator coolant.

10. Connect all hoses and chains.

11. Connect the battery.

12. Run the automotive motor.

13. Check if there are any drops or leaks.

14. Believe the synchronization of the gas distribution mechanism with the help of a light strobe (supplies light pulses per unit of time).

3. Difficulties when replacing the timing chain

By setting a new timing chain, it is important to pull it properly, since too weak stretch will lead to its sagging, which means there is a possibility of retelling and damage to engine parts. The too stretched chain may simply not withstand pressure and break from excessive tension force. In general, if you decide to cope with the task yourself, then do it very carefully, and if any problems arise, it is better to immediately turn to the experienced mechanics, otherwise "self-treatment" can lead to a more complex breakdown and large material spending .

Note! Before moving to direct actions, make sure that you definitely have everything you need for high-quality performance. Programmes are not suitable for this, since they do not exclude the possibility of slipping and receiving injuries from the use of an unsuitable toolkit. Always extremely carefully contact hot parts, sharp or other hazardous materials.

Work on a flat and clean surface, supporting vehicle Not only with the help of a jack, but also additional backups. The option of work on a unreliable and non-rigid surface must be completely excluded. Never leave antifreeze for radiators in an open container and unattended, as it is poisonous and dangerous for people and animals. All such fluids need to be stored only in special, tightly closed containers.

The car owner periodically faces breakdowns. Some can be eliminated quickly, with others you have to tinker. The problem of which will be speaking today, refers to the second category. In order to change the timing chain, you will need serious technical skills. But this does not mean that independent replacement is non-profit.

Causes of the replacement of the chain of the gas distribution mechanism

It is subject to replacement in two cases:

In case of cliff.
In case of serious stretching.

Chain break is an emergency. If this happened on the go, all valves will be damaged in the engine almost guaranteed. They will have to be changed along with the chain, and the replacement (with the preliminary witch) will require the intervention of specialists and will cost the car owner very expensive.

The stretching of the chain is occurring much more often. As a rule, it is associated with the so-called metal fatigue. Typically, the chain is slightly stretched through 200-300 thousand km of mileage (but this applies only to the original, high-quality chains from the car manufacturer, less high-quality chains can be stretched through 80-100 thousand kilometers). Stretching leads to a violation of coherence in the work of the camshaft and crankshaft, which in turn affects the work of the entire motor. It becomes unstable, on small speeds, the engine loses her riser, jerks appear when touching from the place, etc.

How to determine wear

the most reliable way - computer diagnostics. The car goes to the car service, is installed on a special stand, and the program accurately determines the degree of distance between the crankshaft and the camshaft, after which the car owner receives a graph of torque of these shafts, for clarity. This method is especially relevant for those who acquire a car with hands. It is no secret that unscrupulous sellers often twist the run meters on the machines, assuring buyers that the car has passed quite a bit. Their motifs are understandable: twist the kilometer is much simpler than to change the stretched part;
second sign of wear: An error P0355 is constantly on the control panel. In the instructions it is written that it appears when the crankshaft sensor is faulty. But in practice, this may mean that the unscrupulous seller before selling has changed this sensor (or even the entire control unit) to mask another error, and the stretched chain is not doing anywhere;
third sign of wear: advanced tensioner rod. To see it, the car owner will have to remove the front cover of the engine. If the tensioner moved 8-10 mm from its initial position - the chain is stretched, and it must be replaced;

Choice: what a spare part is better

Here the Council can only be one: it is necessary to buy a spare part released by the car manufacturer. And it is necessary to do this only in specialized service centers. In no case should not rely on products of third-party suppliers. Because it is too responsible engine detail, problems with which can lead either to a very expensive repair, or to the complete outlet of the motor. Yes, branded chains are expensive. Nevertheless, this is not the spare part on which to save.

Procedure for replacing the timing chain

Before changing the chain, you should decide on the tools that will be needed for this.

Tools and consumables

New chain from the car manufacturer.
Set of horn keys.
Set of attic keys.
Shutter with flat sting.
A hammer.
Chisel.
Mounting blade.
Cut wire (diameter 0.5 cm, length 30 cm).

Sequence of actions when replacing

The machine is installed on a neutral transmission. From the engine of the machine, the front cover is removed to provide access to shafts and gears.
The crankshaft manually turns until the label on the stack of camshaft does not coincide with the label on the engine housing. On the crankshaft itself there is also a label. And she should also coincide with the label on the housing.
Tags installed on the camshaft and the GDM body must completely coincide.
The lock washer installed under the bolt of the stars of the camshaft, neatly extension with the help of a chisel and hammer.
The locking washer camshaft is elegted with a chisel and hammer
Now the car is installed on the fourth speed, after which the handbrake is turned on.
The fastening bolt of the camshafts of the camshaft is weakened by the key.
The nut on the camshaft is weakened by the on-line key on 17
After that, the timing of the timing chain is unscrewed and extracted (it is most convenient to remove it with a wire hook):
Soothing chain is removed and removed by a wire crochet
Then the tensioner shoe is removed (it is designated on the photo number 1). For this, the bolt 2 bolt 2 is fully dismissed by the horn key on 14, after which the shoe with the tensioner is removed from the engine:
The tensioner shoe is designated on the photo of a number 1, a bolt that holds it - digit 2
Now the stars is unscrewed by the key auxiliary aggregatesBut not completely. It is slightly relaxed, but remains on its shaft.
Auxiliary stars weakened, but not removed
Since the tension of the chain weakened, it engages with a wire crochet and removed from the engine:
Old timing chain is extracted with a wire hook
The new detail is put on the removed starrel of the camshaft. And only after that the stars is installed in place:
The new chain is put on the stars of the camshaft, which is then installed in the engine
After that, it is checked, whether the labels on the stars and shafts coincide, if not, the neutral transmission is turned on, and the crankshaft manually scrolls until the coincidence. After that, it is naked (but in no case is not delayed) the bolt on the stars of the camshaft.
Now the chain calm and the tension shoe is installed on the regular place.
Next, nuts on the stars of two shafts are tightened, after which the crankshaft turns 3-4 times. At the same time, the coincidence of labels on the stars and the case is monitored. If there are no discrepancies - a new spare part is abundantly lubricated motor Oil, After that, the front engine cover is installed on a regular place.

Video: installation chain do it yourself

Replacing the timing chain is a complex process. Even experienced masters, he takes hours 5. The car owner who decided to spend this procedure independently, should clearly imagine what he does, as the consequences incorrect repair May be very serious. Special attention should be paid to the correct location of the labels. It is necessary to achieve perfect coincidence and ideal synchronicity, because without this, the replacement cannot be considered successful.

On many opel cars Today, the chain drive of the gas distribution mechanism is used. These include such popular models like Aster H and Astra J, Antara, Vectra, Zafira, Insignia, Corsa, Meriva. This drive demonstrates high reliability and durability. The main advantage is a significant operational resource, which has a timing chain Opel. The single-row chain of the gas distribution mechanism is much longer compared to the rubber belt. However, it is susceptible to wear. Moreover, the consequences of its failure may be no less severe compared with the consequences of the belt break. Therefore, the replacement of the Opel chain is one of the most important service operations. To avoid serious and expensive repair of the power unit, it is necessary to ensure its timely replacement, and only qualified motorists should be performed.

Why and when you need to replace the timing chain Opel

In the process of operation drive chain The gas distribution mechanism is subjected to significant mechanical and temperature loads. As a result, it gradually wear out and saves. Its reason is to wear hinges and joints between the links. As a result, the backlash occurs, and the sagging is formed. With this state of the gas distribution mechanism, the engine begins to work in unfavorable mode. Therefore, the Opel timing chain is urgently fulfilled.
If you do not replace it in time, then the slipping and jumps on an asterisk on one or more teeth are beginning. This causes a violation of the phases of gas distribution, which in the harmless case can lead to the fact that the engine will stall and no longer be repaired. With an unfavorable circumstance, there may be a meeting of pistons and valves with all the consequences resulting from it. In some cases, the chain breaks, which makes the mutual blow of the pistons and valves almost inevitable. The result is not only the sleeved valves, but also serious damage to the cylindrophone group and the valve mechanism as a whole. To eliminate such breakdowns is often required overhaul Motor.
Considering the above, it is important not to skip the time when the opel of your model should be replaced. In many ways it depends on the litter of the power unit. For small-scale engines (up to 2.2 liters), the average service life of the component is up to 150 thousand mileage kilometers, on cars with more than 2.2 liters, the service life is usually larger.
At the same time, experts recommend regularly checking the status of the timing of the timing of timber in the car service, at least every 50,000 kilometers. This is explained by the fact that in many cases the chain can wear out prematurely. For this there are several main reasons. One of the main among them is the problems in the lubrication system. At a low level or quality of oil, as well as in its insufficient pressure, the lubricant of the chain is significantly worse, which causes it very fast wear. Also on the period of its service negatively reflects the transportation of heavy loads, a sharp range of revolutions, frequent ride on increased turns etc.
The presence of a tension of the chain and the need to replace it may indicate elevated level Noise from the MRM Drive Area, which is distributed during the operation of the power unit. In this case, computer diagnostics shows an error in the camshaft sensors. It should be noted that only a qualified specialist can determine the noise characteristic of this malfunction of the gas distribution mechanism. Therefore, it is necessary to pay attention to indirect symptoms. These include bitter sounds when starting the motor, unstable work DVS, jerk, decrease in the techniques of the power unit, fast heating of the coolant, etc. The presence of such signs is a significant reason to contact the car service to verify the state of the gas distribution mechanism.
When wear, the chain is only replaced. This is a complex procedure that can take from 5-6 hours to several working days. The complexity is also determined by the driver of the motor. So simpler is the replacement of the chain of the Corsa, Meriva, Astra with volume of the economy From 1.0 to 1.4 liters. Two chains are already installed on Zafira and Vectra, one of which is balancing, and the other is the main one. Opel Antara uses two balancing chains and one basic one, each of which is attached tensioner, the sedator and guides, which also must change. When conducting a replacement, only original parts must be used, including Remkomplekt. Thus, this procedure can be performed only in the conditions of modern professional service.

Fast and high-quality opel chain replacement

If you need a replacement of the Opel timing chain, we recommend contacting our car service. We specialize in this brand cars and have many years of experience with them.
We offer our customers the following advantages:
Performing work with highly qualified motorists with great experience;
strict observance of work technologies;
the use of original parts that are offered in our favorable price;
Attractive value and short time of work.
Our specialists will be able to determine the need to determine the need and fully and without excess costs to replace the chain drive nodes on Opel vehicles. At the same time, the car owner is guaranteed reliable and efficient operation of the engine for a long time.

At the same time, the chain replacement is also the necessary operation in the case when it comes the moment of its significant wear. In other words, the timing chain has a certain resource, at the end of which the element needs to be changed. During the operation of the engine with a timing chain, car owners and masters pull up a worn chain different ways. The increase in the length on the working part of the chain tensioner is considered sufficiently common solutions, which is achieved using a steel tube of a suitable diameter. Some weld on the so-called "shoe" of brackets, etc.

It should be remembered that if the timing chain has been stretched, then the likelihood of incomplete coincidence of the phases of gas distribution is high. Such a defect significantly affects the work of the total engine, the engine can work noisily, with interruptions, not to issue full power, overcome fuel, badly start, etc. The worn chain also significantly reduces the service life of the Bashmak, quickly dismisses the caller of the chain. In some case, the timing chain is also possible, which leads to serious consequences for the engine. Next, we will look at how to change the timing chain itself, what is needed in order to change the timing chain and how much it costs.

Read in this article

How to replace the timing chain

Let's start with the fact that the replacement of the timing chain is a standard procedure. At the same time, the features of the chain replacement on a particular car model may differ. As a simple example, we will look at how to change the chain on domestic Vaz 2106 For a better understanding of the features of this process. First of all, I would like to note that proper replacement Chains involves removing the front engine cover. However, many masters, taking into account the specific labor intensity of this operation, prefer to cut the timing chain links on the weight.

We draw your attention to the fact that this method of replacement is not recommended to apply without extreme need. In general terms, the units of the old chain are spawned, then a temporary connection with a new chain is performed, after which it is turned in such a way that the new chain becomes in all asterisk. Next, the chain is pulled up to the moment until the "docking" with an old chain was turned off earlier, after which the link of the new chain is also splown. The minuses of such a method should include the fact that the overall reliability of such a compound is questioned, a reduction in the resource of a new chain, etc.

In order to replace correctly, you need to remove the front cover of the internal waf, as well as pulley. Before starting work, it is also recommended to remove the terminal with, parallel the case is removed air filter, valve lid.
Then the engine must be set. Top label Located on an asterisk from the inside, there is also a tide to the center of the camshaft housing. The lower label is a strip on the crankshaft pulley, duplicated from the end of the pulley risk-tide. The specified label must be combined with a label that is made on the front lid of the internal comb. To make it more convenient, look at the combination of labels is better from the side where the rubber is located.
Next, you need to remove the ratchet, holding the pulley crankshaft. To solve the task for the mudguard on the left side, a wooden rail or a small bar is placed, which will avoid shocks along the spar. Then the key is thrown into the crankshaft ratchet. The key is the key with a flat hexagon, has a long handle. This key is put in such a position so that it can have a space for moving and subsequent strike on a wooden bar.
Now you can take off the ignition coil and translate the gearbox to the "neutral". The engine is then scrolled by the starter, the key is thrown at this moment beats on a wooden bar on the spar. Usually, the ratchet can be released after 2-3 scrolling. Add that if special key No, then the knob is suitable with a head and a short shoulder. At the same time, it is necessary to consider that the head from the end you need to hold with the help of an additional tool, since the landing density may not be enough. Sometimes to solve the problem, a cape key that has a small transition angle is suitable.
Next, the crankshaft pulley can be removed, release the bolts of the front cover of the power unit and then remove the lid itself. Next, the chain tensioner fastening bolts are released, after which the tensioner is removed. After removal, it is necessary to estimate the status of the "shoe" of the tensioner, to inspect the item, believing it.
You will also need to reject the lock washer of the top of the top of the upper sprocket, after which the bolt itself is unscrew, then the pulley is removed. A similar procedure is carried out with a pulley of auxiliary shaft, which is also removed. The key to 10 will fit the key to 10, which remove the chain limiter. The final stage becomes the removal of the timing chain itself.

It is worth paying attention to the fact that an important point is the test of the stars themselves. To do this, you need to take a new chain and put it on an asterisk, after which the chain from the bottom to grab the hand, crimping around the pulley. If the chain when landing does not have a strong backlash, then the asterisk is suitable for further operation.

Also, in this way, you can compare the degree of hopes when you catch up with a new and old chain. In the event that the backlash is the same, then you should think about replacing the pulleys to new ones. We add that the replacement of stars is the recommended procedure when replacing the timing chain, regardless of their condition. If the motorist thinks about how much the timing chain is worth it, then this nuance is also worth considering the list of additional expenses.

Installing a new chain of the gas distribution mechanism

In the process of reverse assembly, the new chain is passed through the star of the crankshaft, the pulley is inserted into the circuit, after which the fastening bolt is hidden. The camshaft star, tensioner and limiter are installed. The completion is the tightening of the pulley attachment bolt, the edge of the fixing washer on the sprocket bolt. Then the new timing chain is stretched. Note that all the actions described above are carried out with the fact that the engine is not scrolled, that is, the tags are exhibited.
Now you can put the crankshaft pulley on the seat, install the front cover, after which the ratchet is tightening. The pulley of the crankshaft is accurately placed with the help of a knitting orientation. To tighten the ratchet can be hit by key. Another way is the removal of the shirt of the flywheel, then the flywheel is fixed using a screwdriver or a metal rod. Then the ratchet can be tightened.

As for the bolt fastening the pulley camshaft, before its final tightening, the coincidence of all tags is first checked. To check the crankshaft scrolls into a couple of revolutions. In the event that the labels did not coincide, then the camshaft star is removed, after which the timing chain is rearranged forward or back to one or two links, which depends on the degree of discrepancy when trying to combine tags.

Next, the pulley is again installed on camshaft to re-control the labels. When the labels coincided, the camshaft star fastening bolt is completely delayed, after which it is fixed with the fact that the locking washer is rejected. At the end of all the work, you should check all the labels again, after which the valve cover is installed in its place.

Let's summarize

Taking into account the foregoing, it can be concluded that the replacement of the timing chain is a responsible procedure. At the same time, the answer to the question where to change the timing chain can be both a trip to the specialized car service and the fulfillment of all actions in his garage.

It should also be borne in mind that when reverse assembly is extremely important to control the coincidence of factory tags. Ignoring this rule often leads to the fact that a fairly frequent situation is such when after the owner has changed the timing chain, the car does not start or the engine works with obvious interruptions. In this case, repeated disassembly is usually necessary with the subsequent correct setting of tags.

Finally, we note that the replacement of the timing belt compared with the replacement of the timing chain is somewhat different. Change the timing chain in the cost service is obtained more expensive by 40-60% and more comparatively with a similar replacement of the belt drive on various models. If you have a replacement with your own hands, then you need to be prepared for what you may need to install a new chain, asterisks, tensioner and sedative.

Matchast

IN car Engine Metal chain is used in one node: in. To understand her appointment, it is worth remembering the work of the mechanism itself.

So, during engine operation internal combustion On many, the fuel and air mixture enters the cylinders through. The combustion chamber is separated from the collector. After combustion, the spent gases are removed already through, which also separates the cylinder from the collector. Valves are closed under the influence of valve springs. And open under the influence of cams.

The cams are located on the axis of the shaft in such a way as to open one valves, while others are closed. The position of the cams with respect to the valves is changing when the camshaft is rotated. In turn, he rotates at the expense. Consequently, it is necessary to somehow transmit rotation from one shaft to another.

The circuit in the engine performs this feature. In many brands and models of machines, the chain is replaced. A hybrid drive is quite rare, in which the chain and belt are installed at the same time. In addition, the drive may additionally consist of several gear.

The chain drive on the gas distribution mechanism has long been used at all, is not a remnant of the past, as inexperienced car enthusiasts are mistaken. The solution is used today, and such giants of the automotive industry, like BMW, Toyota, Mitsubishi and many others. The reason for this is the following advantages:

Strength. The chain extremely rarely receives mechanical damage;
Wear resistance. With proper care, the RMS circuit's resource ranges from 100 to 200 thousand mileage kilometers;
The chain resource does not affect low or high temperatures;
The chain under load is not stretched (the tension of the chain occurs, but only over time, as the resource is generated);
Local resistance to local sharp overloads;

Disadvantages of chain drive timing

Increased weight. In some cases, this item will seem controversial, and sometimes the weight really matters. For example, in racing cars.
The complexity of the design, more technological and costly production. That is, more high price Spare parts for the end user. In addition, the design of the entire timing of the timing is complicated and the structure itself is complicated, since the calm, the chain tensioner is needed. These details also fail and often create additional problems.

The complexity of the replacement. In order to replace or at least check the chain in the car's engine, you will have to remove a special cover on, the cover of the block itself (depending on the brand and model of the machine).

Some motorists cannot or do not want to perform these operations on their own, as a result, they are forced to spend additionally money in car service. In addition, it will be necessary to replace the position of the crankshaft and the camshaft correctly, which adds trouble.

Noise. Even the new chain will be published during the engine operation more noise than the belt.

How to understand that it is time to change the chain in the engine

The chain of the gas distribution mechanism, despite its wear resistance, also have to change. Most often, this is due to the fact that it is stretched.

That is, its length increases by several millimeters. As a result, the tension deteriorates, the chain often jumps on 1-2 gear teeth. All this can lead to extremely negative consequences. For example, to the junction engine.

The most disturbing signal that will attract the attention of even an inexperienced driver, this is a characteristic noise published by a stretched chain: rattling and sound friction chain. It is heard even with the general noise during the engine operation. In this case, it is even possible that the engine will stall, as the chain jumps on 1-2 tooth and gas distribution is disturbed.

But, by itself, of course, it is better not to communicate to such symptoms, but to regularly check the tension of the chain. You can focus on mileage. The circuit on an engine of a type or another has a specific average resource (depending on the model and car brand). As a rule, this is an indicator from 100 thousand mileage kilometers. To calm conscience, you can check or replace the timing chain before. For example, after 60-80 thousand km.