Many drivers know that engine compartment car is a time bomb. Of course, we are talking about the timing belt of the engine (timing), which must be changed after a certain interval of time or after a certain mileage of the car. Those owners who ignore this time interval prescribed by the automaker (replacement toothed belt timing), are very risky, because if the timing belt breaks, the engine in their car can be seriously damaged (fail).
Besides everything, besides regular replacement timing belt, the owner of the car must be very careful when changing and drive belts by car. Here's the thing, while scheduled replacement drive belts can easily and unnoticeably damage the timing belt. We also draw your attention, dear motorists, to the fact that in most car models it is connected directly to the water pump. Thus, you need to remember that in addition to the timing belt, it is also necessary to change the water pump itself in time, which also wears out over time.
But in general, judging by the money, replacing the timing belt and pump is not so cheap. But your costs will be a guarantee that the engine of your car will work enough for a long time. So remember, friends, in no case save money on this by constantly postponing the planned replacement of the timing belt for later. Remember that by doing this you simply increase the risk of serious engine damage.
Why, then, in this case, damage to the timing belt or its breakage can disable the car engine? The thing is, it makes the synchronization of the crankshaft and camshaft very necessary for the engine in the car, which opens and closes the intake and exhaust valves. This process is called engine timing synchronization. Now imagine what would happen if a few teeth were damaged on the timing belt and it shifted. Or even worse, it will take and break off. (?) This will cause the valves of the block head to open at the wrong time and then immediately collide with the engine pistons.
If you are lucky at this moment, you will have to replace the valves themselves and possibly the entire engine block head. Well, if you are not lucky, then there is a possibility that the engine cannot be restored, due to the impossibility of repairing it due to extensive internal damage.
Although it should be noted here that today in the car market there are certain brands of cars in which, when the timing belt breaks, no engine damage occurs. This is due to the very design of some modern motors, where, if the timing belt breaks, the valves and the piston of the power unit cannot collide with each other.
True, it should also be noted that the vast majority of these engines are installed on rather old cars. As a rule, these are motors in which, compared with modern engines the compression ratio is small.
For example, on old Volkswagen The second generation Golf, which was produced from 1984 to 1991, has a 1.8-liter engine with 90 hp. and, in the event of a broken timing belt power unit machine remains unharmed. Unlike many modern motors that easily fail when the timing belt breaks, these motors are more reliable. And even more so when it comes to comparison with today's new turbocharged engines, which have a fairly high compression ratio.
When should the timing belt be changed?
Basically, each automaker himself sets the recommended interval for replacing the engine timing belt. But unfortunately, many car owners do not comply with this and change the timing belt at the wrong time. First of all, this is due to the fact that many of the motorists believe that since there are no external signs of wear on the belt, the replacement interval recommended by the automaker can, in principle, be increased. This is just the main mistake of such car owners, which often turns around big problems with the engine when the timing belt is suddenly damaged and breaks. Therefore, remember, friends, in no case should you exceed the scheduled replacement of the timing belt, which is recommended by the automobile company (s).
And yes, carry out visual inspection the timing belt itself is also a must. But this inspection is recommended to be carried out between belt replacement intervals according to the established regulations by the automaker. It is desirable to do this every 10 - 15 thousand km, that is, with each MOT. This is necessary and must be remembered in order to detect microcracks or other damage on the timing belt in time, which may appear even earlier than the prescribed scheduled replacement interval, than set by the manufacturer.
Why does the timing belt need to be changed on time? The thing is, over time, any belt loses its physical properties, which may cause it to break or be damaged. It is for this very reason that if you do not replace the timing belt in time within the time period set by the manufacturer, you can increase the risk of an unexpected break in the belt, which will accordingly lead to the inevitable failure of the engine itself. So remember friends, even if the belt does not have any external signs damage, this does not mean that it is not necessary to change it.
How often should the timing belt be changed?
Timing belt replacement intervals can vary significantly. It all depends on the brand, model and modification of the car. As a rule, the scheduled replacement of the timing belt occurs on a run from 60 thousand to 240 thousand km. In addition to the run itself, this timing belt must also change as planned, depending on the period of its use. This is primarily due to the fact that over time the properties this belt change and the belt becomes more fragile.
For example, in a car with a 2.0 liter diesel engine with 140 hp. the timing belt should be changed every 210 thousand kilometers. The same belt replacement mileage interval applies to such diesel models cars like Passat and Touran.
IN last years some automakers have extended the interval for scheduled replacement of the timing belt. For example, produced (released) in 2000 and equipped with 1.9-liter diesel engines, the timing belt needed to be changed every 90 thousand km. And starting with cars manufactured by the company since 2010 with a 2.0 liter diesel engine, such a scheduled replacement of the timing belt could take place every 210 thousand km.
This is primarily due to the fact that modern cars have new modifications of engines that carry (have) new design solutions. For example, camshafts and their system of operation have changed significantly over the years. Also in many cars, the timing belt is no longer connected to the water pump or power steering. Ultimately, the load on the timing belt was significantly reduced, which allowed automakers to increase the replacement interval.
Some automakers in their modern cars have begun to use a metal chain instead of a timing belt, which has a minimal risk of breakage even with enough high mileage cars.
Usually, the manufacturer does not even set any scheduled replacement intervals for engines with a timing chain. No, no friends, this does not mean that the timing chain can never be changed at all, sooner or later the chain will still have to be replaced. But this usually happens only with a very high mileage of the car.
How much does it cost to replace a timing belt.
Of course, the costs associated with replacing the timing belt primarily depend on the time of its replacement. Everything is logical here. The longer it takes to replace it, the more work it will cost to install a new timing belt. So remember, differences in the cost of replacing a belt can be significant and vary within reasonable limits. It all depends on the brand, model and modification of the engine, well, etc.
Thus, we have understood the following, how much you will pay for a timing belt replacement will directly depend on the complexity of the engine and on the availability of the timing belt in the engine compartment. Also, the final cost of replacing the belt will depend on the location of these works. Of course, it is clear to everyone that you will give the most money in the official dealership. technical center. Least of all - in informal autotechnical centers.
For example, the average cost of replacing a timing belt on an Opel Astra with a 1.6 liter gasoline engine is about 8,000 rubles (4,000 rubles labor + 3,000 rubles cost of a timing belt). It should be noted right away that these are average prices in Russia from an unofficial dealer. At the Opel car service station, this cost will be much higher.
And here is another example for another car. Let's find out together how much it will cost to replace the timing belt in a car with a 2.0 liter diesel engine. average cost belt replacement is about 12 thousand rubles. As you can see, friends, the difference between the two brands of cars is obvious. This is primarily due to the time of work on replacing the timing belt. Obviously, the VW Passat has a longer belt replacement time than the same.
By the way, we want to note right away that some Volkswagen models(e.g. Golf VI from 2.0 TDI engine and a power of 140 hp) to replace the timing belt, you will need to remove the entire car from the car. And you yourself understand that the cost of replacing the belt in such cars can be very large and expensive. The thing is, in such modifications of cars, the timing for replacing the timing belt can reach (make) up to two days.
Therefore, remember friends, when buying a car, we advise you to find out in advance at any of the car services how long the timing belt is scheduled to be replaced in a particular car model that you are going to purchase. Also, check in advance about the cost of such a replacement. Thus, we hope that you will not buy a car whose maintenance cost can reach and be comparable to the most expensive sports supercars.
Who should change the timing belt.
Of course, all work on replacing the timing belt should be carried out by a professional. So remember, if you do not have any experience in this matter, then do not even think about changing it yourself. This requires experience and practice, which can only be obtained under the close supervision of a professional car mechanic.
The main risk when replacing the timing belt is as follows, after replacing it, when starting the engine, the crankshaft and camshaft should immediately begin to work synchronously. The slightest mistake installation can quickly damage the engine.
Remember, friends, that even the slightest deviation in the timing of the crankshaft and camshaft will immediately lead to the fact that the valves in the engine head will meet the pistons of the same engine. Moreover, this can happen almost immediately after starting the engine.
Here, dear friends, is a table with scheduled replacement intervals for the timing belt on many modern cars. The table also shows the timing of belt replacement according to the time of its use in the car, in the event that the car is not used so often.
| Timing for timing belt replacement: Replacement intervals by mileage and by time (by car models) * | |||
| Model | Engine | Power | Interval (mileage) / Belt life |
| Alfa Romeo Giulietta | 1.6 JTDM (Diesel) | 105 HP | 120000 km / 4 - 6 years |
| Alfa Romeo | 1.4 16V | 95 HP | 120000 km / 4 - 5 years |
| Audi A3 (8P) | 1.9 TDI (diesel) | 105 HP | 120000 km |
| Audi A3 (8P) | 2.0 TDI (diesel) | 140 HP | 120,000, 150,000 or 180,000 km (depending on engine type) |
| Audi A4 (B8) | 2.0 TDI (diesel) | 143 HP | 180,000 km |
| Audi A4 Convertible | 2.0TFSI | 200 HP | 180,000 km |
| Renault Duster | 1.5 DCI (Diesel) | 107 HP | 100,000 km / 5 years |
| Renault Sandero | 1.4 MPI | 75 HP |
120,000 km / 5 years or 80,000 km / 4 years or 100,000 km / 5 years (depending on engine type) |
| Fiat 500 | 1.2 8V | 69 HP | 80000-120000 km / 5 years |
| Fiat 500 | 1.4 16V | 100 HP | 80000-120000 km / 5 years |
| Ford Fiesta (from 8.2008) | 1:25 | 82 HP | 160,000 km / 8 years |
| Ford Fiesta 6 2008 gene | 1.4 | 80 HP | 160,000 km / 8 years |
| Ford Focus (II) | 1.6 TDCI (Diesel) | 90 HP | 200,000 km / 10 years |
| Ford Focus C MAX | 1.6 Ti-VCT | 115 HP | 160,000 km / 8 years |
| Ford Galaxy II | 2.0 TDCi (Diesel) | 115 HP | 200,000 km for manual transmission (100,000 km for automatic transmission) / 10 years |
| Ford Kuga | 2.0 TDCi (Diesel) | 136 HP | 200,000 km / 10 years |
| Hyundai Tucson | 2.0 CRDi (diesel) | 140 HP | 120000 km / 8 years |
| Kia CEE"D ED | 2,0 | 143 HP | 135000 km / 6 years |
| Kia Picanto | 1.1LX | 65 HP | check at 60,000 km / 4 years, replace at 90,000 km / 6 years |
| Opel Astra G and H | 1.7 CDTi (Diesel) | 80-110 HP | 150,000 km / 10 years |
| Opel Astra (H) | 1.6 Twinport | 105 HP | 150,000 km / 10 years |
| Opel Astra (J) | 1.6 | 115 HP | 150,000 km / 10 years |
| Opel Corsa (D) (chain) | 1.2 16V | 80 HP | Chain, Visual inspection every 50,000 km |
| Opel Insignia | 2.0 CDTI (diesel engine) | 130 HP | 120000-150000 km / 10 years |
| Opel Mervia B | 1.7 CDTi (Diesel) | 130 HP | 90000-150000 km / 10 years |
| Opel Zafira B | 1.6 | 115 HP | 150,000 km / 10 years |
| Renault Megane III | 1.6 16V | 110 HP | 120000 km / 6 years |
| Renault Twingo (II) | 1.2 16V | 76 HP | 120000 km / 6 years |
| Seat Altea | 1.6 | 102 HP | Check at 90,000 km, then check every 30,000 km and replace if necessary |
| Skoda Octavia I | 1.9 TDI (diesel) | 110 HP | Every 15,000 km or 12 months Visual inspection |
| Skoda Octavia II | 2.0 TDI (diesel) | 140 HP | 120000-150000 km |
| Skoda Roomster | 1.9 TDI (diesel) | 105 HP | Without DPF for 120,000 km With DPF for 150,000 km |
| Skoda Superb (type 3T) | 2.0 TDI (diesel) | 170 HP | 150000 km |
| Skoda Superb I | 1.9 TDI (diesel) | 130 HP | for all vehicles manufactured before 07/2003 90,000 km, from 08/2003 120,000 km |
| Skoda Yeti | 2.0 TDI (diesel) | 140 HP | 120000 km |
| Toyota Avensis (second generation) | 2.0 D-4D (Diesel) | 115 HP | 105000 km |
| Volvo V60 | D3 (diesel) | 163 HP | 180000 km / 6 - 8 years |
| VW Golf (IV) | 1.4 16V | 75 HP | |
| VW Golf (V) | 1.4 16V | 80 HP | Check at 90,000 km and then every 30,000 km |
| VW Golf (V) | 1.6 | 102 HP | Check at 90,000 km and then every 30,000 km |
| VW Golf V GTI | 2.0TSI | 200 HP | 180,000 km |
| VW Passat (B7) | 1.6 TDI (diesel) | 105 HP | 210000 km |
| VW Polo (V) | 1.6 TDI (diesel) | 75 HP | 210000 km |
| VW Sharan II / Seat Alhambra | 2.0 TDI (diesel) | 140 HP | 210000 km |
|
* Pay your attention. You can find out the exact interval for replacing the timing belt in the instruction manual and maintenance your car. |
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An old VAZ 2109 with a 1.5 8 valve engine, timing belt replacement. In general, it could have been a VAZ 2114 or 2110, there is no difference in operation, the eight-valve engine is the same everywhere. Together with the belt, we will change the pump, the tension roller and two pulleys, the camshaft and the crankshaft. When the timing belt breaks, valves on this engine do not bend, but it's better not to do that. Changing the pump and roller is required condition so that after a thousand kilometers not to disassemble everything again. But the pulley is up to you, the issue price is 150 rubles per pair. There were cars where a slightly bent pulley made the belt slip and gradually erased it, reducing its service life. On this machine, the belt was erased in half.
We recommend that you periodically check the condition of the belt in order to eliminate annoying consequences and not look for someone who will drag it to a car repair shop. Replace every 40,000 kilometers.
And here is the patient himself.
To replace, we need a key for tension roller, the issue price is half a hundred rubles. You can buy it at any auto shop. As well as a set of keys and heads and two hours of free time.
Begin
All we need.
We unscrew the three bolts for ten fastening the protective cover of the timing and remove it.
We take the generator to the engine and remove the belt.
We remove the engine protection and drain the antifreeze. We set the camshaft mark by turning the crankshaft clockwise. The ebb on the pulley should be opposite the bend of the protective cover fastening.
Loosen the crankshaft pulley bolt. We put the assistant in the cabin and force him to turn on the fifth gear and press the brake. And at this time we ourselves easily and naturally unscrew the bolt using a 19 head and a pipe of a meter and a half. It must be twisted in good faith, and some other craftsmen lubricate it with sealant and wait after that for kind words addressed to them.
On the left side we see the crankshaft position sensor. We will need it for the subsequent verification of the correct installation of the timing belt. We remove the crankshaft pulley and see the coincidence of the marks.
We unscrew the nut on the 17th tension roller and remove it together with the belt. Then we unscrew the bolt of the camshaft pulley and remove the latter. Be careful not to lose the key. We unscrew everything that secures the protective metal shield, namely one nut for ten and the cover fastening bolt, three pump fastening bolts.
We are filming protective cover and pump. The antifreeze remaining in the block may pour out if you have not drained it. He's definitely sweet.
We clean all parts from oil and belt residues, as well as seat pumps from the old gasket and sealant.
Lubricate the gasket of the new pump with sealant and put it in place. We put the metal protection and tighten all the bolts and nuts that secure it. We tighten the pump bolts evenly in a circle, after which we check whether the pump is spinning. Recently, a client brought an original pump, which turned out to have slightly larger petals, and after installation it had a snack. I had to modify the grinder and take measurements several times. Here are the parts we have.
We check whether the key on the camshaft is lost and put the pulley. We tighten its bolt by seventeen.
And now the fun part - installing a new belt
We check the coincidence of all labels. We put the belt first on the crankshaft and pump. Then we pull the right descending branch of the belt and put it on the camshaft pulley and tension roller. Once again, check all the marks and tighten the belt with a roller. The tension is considered sufficient if, with the force of two fingers, you can twist the longest branch of the belt by a maximum of 90 degrees. And it’s easier, we take the right branch of the belt with two fingers and twist it, if more than 90 it’s not very bad, but less is very. An overtightened belt will wear out quickly and will also reduce pump life.
We put the lower protective plastic cover. And on the crankshaft pulley we mark the twentieth tooth after skipping two teeth. We count counterclockwise.
This label matches top dead points of the first cylinder. We put the pulley in place and the mark should stand against the crankshaft position sensor. More precisely, against the small iron core of the sensor. Sometimes it falls into the gap between the teeth, this is considered acceptable. We tighten the pulley in the same way as we unscrewed it, with the help of a partner.
We turn the crankshaft two turns and check the marks, here our mark on the pulley will come in handy.
If everything is horrible, we collect everything that was dismantled. As they say in smart books - install the parts in the reverse order of removal. Don't forget to add antifreeze.
We start the car, accept congratulations from relatives and friends and forward, to meet adventures.
Video of replacing a timing belt with a carburetor nine
Good luck on the roads. Not a nail, not a wand!
Timing belt replacement is carried out depending on the degree of wear of this mechanism, the performance of the car engine and the mileage of the vehicle. To carry out such a procedure yourself, you will need to have at hand a minimum set of tools and clearly follow the instructions.
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After how many thousand kilometers do you need to change
For each car, the frequency of replacing the timing belt is different, which can be found in the technical documentation of the car. On average, the belt is changed after a run of 50,000 km. If timing belts with reinforced metal cord, their service life is 30% longer than usual.
The mileage at which it is necessary to replace is presented in the table:
How do you know when it's time to change the belt?
When the date of the last replacement of the timing belt is unknown, this part should be inspected for wear.
Signs that indicate the need to replace the belt:
- oil leakage;
- damaged consumable surface;
- the presence of bulge and uneven wear;
- worn teeth;
- cracks along the entire length of the belt;
- recesses on the teeth after starting the motor.
The consequences of a broken timing belt
For gasoline engines the following consequences after a broken belt can:
- Failure of all elements of the motor.
- The gas distribution mechanism may be unsuitable even for repair. This can be caused by a strong impact of the pistons, after which the timing head is deformed.
- Damage to the cylinder block. Fallen into disrepair piston rings damage the mirror surface of the combustion chamber.
In diesel engines, a broken timing belt often leads to the following consequences:
- bearing damage camshaft;
- piston rod deformations;
- intake valve failure.
The Car Program channel removed the consequences of a broken timing belt.
When choosing a strap, consider the following recommendations:
- Do not pay attention to cheap goods. When using a low-quality or non-original part, engine repair will cost several times more.
- The belt must be elastic, and its surface must be smooth and without rubber deposits.
- The article number, number of teeth and length must match the old strap.
It is better to give preference to such timing belt manufacturers: Contitech, Bosch, Dayco or Gates.
Timing belt replacement
Replacing the timing belt includes several steps:
- Selecting the required tools.
- Preparatory work.
- Dismantling the old belt.
- Installing a new timing belt.
Choosing the right tools
To carry out work on replacing the timing belt, you must have the following tools:
- adjusting key for belt tension;
- open-end wrenches;
- a set of hex bits;
- car jack;
- mounting spatula or a large screwdriver.
Preparatory work
Before changing the timing belt, you must:
- Place the car on a flat area in the garage or on a flyover.
- Turn on hand brake and put wheel chocks under the wheels.
- Lock the gearshift lever in neutral position.
- Disconnect battery terminal.
Removing the old belt
Removing the old timing belt is carried out according to the following algorithm:
- To begin with, the protective casing of the belt drive is removed using hex bits.
- The power circuit from the crankshaft sensor is disconnected.
- An open-end wrench for 17 removes the alternator pulley.
- By turning the camshaft, the position of the shafts is set according to the marks (marks are applied on the timing gear drive, which must match the pulleys).
- Next, you need to loosen the tension roller using special key and fix the flywheel with a powerful screwdriver or mounting spatula. The flywheel must also be on the mark.
- The belt is carefully removed and the tension roller is checked for suitability.
Installing a new timing belt
Do-it-yourself belt installation is done in the following order:
- A new tension roller is installed.
- On the crankshaft and camshaft is pulled new belt without breaking labels.
- The belt is tensioned so that it can rotate no more than 90 degrees.
- The timing drive is manually rotated clockwise.
- The labels are rechecked.
- A screwdriver or spatula is removed from the flywheel.
- The timing cover is being installed.
- The terminals are connected to the battery.
- The motor starts.
Is it necessary to change the pump when replacing the timing belt?
According to experts, it is not necessary to change the pump along with replacing the timing belt.
Its service life is 50% longer than that of the timing belt, so the pump changes in two cases:
- with every second belt change;
- when there is suspicion wrong work pumps.
How much does a timing belt cost?
A comparative table of the cost of the timing consumable is presented in the table:
Video
The video from the Techno-056 channel shows in detail the replacement of the timing belt.
In order to extend the life of your car, you need to timely replacement timing belt. This is a very important and vital operation. As a rule, the timing resource is designed for approximately 60,000 thousand kilometers. However, experts recommend replacing much earlier in order to eliminate unforeseen situations.
It is worth remembering that it is responsible for the operation of the gas distribution mechanism. or the timing belt is very important detail, on which the coordinated action of the camshaft, crankshaft, valves and pistons depends.
The consequences of a rupture in diesel and gasoline engines completely different, but nevertheless, always deplorable. Considering that gasoline and diesel engines different degree compression (less for gasoline), then the combustion chamber is larger in volume and in the event of a rupture of the valve belt, they do not rest against the piston when it is at top dead center.
The only exception is V arrangement valves, which account for the blow from the gap. IN this case along with replacing the belt, you will have to repair damaged valves. Something similar happens with, however, they basically have an in-line valve arrangement. Therefore, after the pistons hit the valve, the camshaft is likely to become unusable.
When to change the timing belt?
There are 2 main reasons why it may be necessary to replace the timing belt.
First reason – normal wear and tear because of long-term operation. Replacing the timing belt, as a rule, should be done after 60-80 thousand kilometers, however, some motorists use the same belt for 200 thousand kilometers or more without much difficulty.
The second reason– damage due to non-compliance with the main requirements for operation, for example:
- too much load on the engine and, accordingly, on the timing due to active driving non-sports cars
- errors made during installation (tag mismatch, etc.)
- exceeding the maximum allowable number of engine revolutions (especially in the cold season).
The main parameter by which the car service masters decide that it is necessary to replace the timing is the degree of its tension. If there are noticeable cracks on the “cheeks” and the bushings are chipped, then it is urgent to replace the timing chain.
Also, the decision to replace the timing chain can be made if there is noticeable difference in the location of the alignment marks to be applied to the pulley crankshaft and the front cover of the engine (provided that the mark on the camshaft sprocket matches the mark on the camshaft bearing housing, the distance may be more than 10 millimeters). The main causes of belt stretching are improper belt tension and natural wear.
Timing belt installation. Timing belt marks and their meaning
Before installation, the question very often arises: “where is the installation mark?”. If there is no desire to search for marks and subsequently mess with replacing the timing, then it is better to entrust this matter to specialists. However, if you have the necessary skills, you can do it yourself. Before starting disassembly, it is necessary to set the camshaft to the control position, and crankshaft should be at the top dead center of the first cylinder (for some brands of cars - in the fourth).
It is necessary to replace the timing belt tensioner pulley, the gear and the belt itself in the manner indicated in the vehicle repair and operation manual (this process is specific for each brand, for example, in VAZ cars, the replacement principle is different from foreign cars). The entire replacement process is described in the video using an example. ford car focus:
Before lowering, after assembly, you need to turn the crankshaft manually and make sure that the pistons do not rest against the valves and nothing prevents the engine from rotating normally. This is where you'll need installation marks. Not everyone attaches great importance to them, but it is precisely the fact that the marks match that indicates that the replacement work and the final assembly were performed correctly.
As a rule, they are located on the rims of the camshaft sprockets and when installed, they should look at each other. Also, on the exhaust shaft gear, the letter “E” should be on top.
Timing Belt Adjustment
In order to adjust it after replacing the belt, you must first remove the front protective cover, and then slightly loosen the bracket bolts (lower), with which the roller is attached tensioner and adjust its position. Next, you need to turn the crankshaft from the side in which the ratchet is tightened by about 3 turns.
The adjusting spring on the bracket will automatically set the belt tension. After that, you need to tighten the bolts. It is also recommended to check the timing belt tension. To do this, you can use a little trick - you need to rotate it around its axis. If the belt has rotated 45 degrees or less, then the tension is optimal and the tension is correct. But do not overtighten it - this will lead to its severe wear and increase the likelihood of a second rupture.
Timing belt selection
In order to avoid unpleasant incidents with the car on the road, you need to thoroughly approach the issue of choosing a belt. Car service specialists always recommend installing original belts only trusted manufacturers and in no case use third-party brands or low-grade fakes.
A good timing belt company is Indian company pix. Products should only be purchased from official suppliers so as not to accidentally buy a fake.
Majority modern cars with piston four-stroke engines internal combustion equipped with a gas distribution mechanism (abbreviated timing). Thanks to him smooth operation enters the motor in a timely manner air-fuel mixture or air (depending on which engine is installed on the car). Then the products of combustion and oxidation of the fuel are removed through the exhaust system of the machine. However, over time, all the details that make up this mechanism, wear out, so replacing the timing belt with your own hands is a procedure that every motorist will face sooner or later. Of course, you can entrust this work to representatives of one of the many car services, but in this case, the owner of the vehicle will have to part with some amount of money that could be saved by replacing it yourself.
Timing belt replacement interval
- If the vehicle is constantly operated in regions with severe weather conditions. Intense heat and severe frosts adversely affect general state belt: reduce its resistance to stress and increase the likelihood of premature rupture.
- If the timing belt has already been replaced on the vehicle. Conditional distance of 100 - 120 thousand km. mileage after which the belt must be replaced applies only to belts that were installed at the factory.
Even the highest quality parts that are purchased to replace the "native" belt, on average, serve no more than 60 thousand km. This is also explained by the poor state of the domestic pavement and not always high quality non-original spare parts.
Timing belt design and signs of wear
The timing belt is a multi-layer structure based on polychloroprene and durable rubber, characterized by high rates elasticity. Every year, timing belt manufacturers improve their quality, because. If the belt breaks, the engine will significant damage, which with a high degree of probability can disable it.
Visual inspection in most cases allows early detection of excessive wear rubber band. Belt needs urgent replacement if cracks, delamination of material, folds and other defects are observed on its surface.
Owners modern machines it is not always possible to inspect the belt visually, because the design of many cars does not allow free access to it. In this case, it is recommended to pay attention to the following indirect signs unstable work timing belt:
- Increased smoke emission from exhaust system car. This is explained by the fact that when the timing belt is worn or damaged, the coordinated operation of the ignition and exhaust valves is disturbed, as a result of which the fuel does not completely burn out. As a result, the remaining unused gases are discharged through the exhaust pipe, resulting in strong smoke.
- Difficulty starting the engine may also indicate that the timing belt has worn out its life and needs to be replaced.
- Extraneous noise during engine operation, as well as engine overheating with further leakage engine oil and coolant, can also mean a timing belt failure.
If one of the above symptoms is present, it is recommended to visually inspect the timing belt for signs of wear. If two or more signs appear at the same time, the belt must be replaced immediately.
Timing belt replacement procedure
First of all, you need to dismantle front wheel located on the right side of the vehicle body. The car must be jacked up, after fixing rear wheels special recoil pads. Next front right wheel must be removed to gain unhindered access to the crankshaft pulley, which must also be dismantled. This is done as follows: at the beginning, remove the drive belts that unwind hydraulic booster steering, alternator and air conditioning pump, and remove the spark plugs (while the first cylinder should be at the top dead center). After that, you can remove the pulley (both manually and using a puller).
At the next stage, the right engine support is removed, blocking access to the covers covering the timing belt. After removing the covers, you can begin to dismantle the belt. For this weakened fixing bolt, responsible for fixing the tension roller, after which the belt is removed.
It is important to prevent movement of the crankshaft pulleys and camshaft, they must remain in their places.
At the last stage, the timing belt is removed, and a new one is installed in its place. After the new belt is installed in its proper place, it must be tightened by tightening the crankshaft mounting bolt. The remaining assembly work is carried out in the reverse order.
If all actions are performed correctly, the engine will run much quieter and more stable, without creating unnecessary vibration.
It should be noted that the sequence of work described in this article related to replacing the timing belt with your own hands can be corrected in practice. This is due to the fact that today there is a huge number of modern cars, the design of which can differ significantly from the design classic models Vehicle. However, for any controversial issue that arises in the process repair work, you can easily find the answer on one of the many forums dedicated to the brand of your car.
Video
Detailed instructions for replacing the timing on the Lada Kalina:
