FUNCTIONAL PURPOSE OF THE TIMING BELT

Replacing the timing belt is part of the scheduled Maintenance car Volkswagen Polo and plays an important role in the operation of the engine vehicle. Untimely replacement the belt can lead to a malfunction of the motor, and a break in the deformation of the valve of the gas distribution mechanism and the need for an overhaul of the engine.

All parts of the gas distribution mechanism are closely related to each other, injection air-fuel mixture drives the piston of the engine cylinder, which in turn pushes the crankshaft connected by a drive belt with camshaft. Thus, there is a movement of the camshaft, which regulates the frequency of movement of the valves. The Volkswagen Polo timing belt connects gears and transmits torque from crankshaft to the distribution one, affecting the speed of its rotation. If the system is working, the frequency of their revolutions should be equal.

TYPES OF FAULTS OF THE TIMING BELT

1. Timing belt wear leads to a change in the torque transmission force from the crankshaft to the camshaft, resulting in a change in the frequency of movement of the pistons and engine valves. This, in turn, leads to a malfunction of the gas distribution system, rapid heating of the engine and, as a result, a decrease in engine power and an increase in the consumption of the fuel mixture. For reliable and trouble-free operation of the motor, it is necessary that the valves close and open at the same frequency as the engine pistons. If, due to wear, the timing belt slips, this can cause a break.
2. A broken timing belt for a Volkswagen Polo is the most dangerous engine damage. In the event of such a malfunction, the camshaft ceases to be associated with crankshaft and can stop completely arbitrarily in a position in which any of the valves of the gas distribution mechanism is open. In this case, the piston, moving up, may collide with the valve, which will lead to its deformation. In this case, the car's engine is in danger of serious repairs. It should be noted that a timing belt break does not occur unexpectedly, it is almost always accompanied by changes in the operation of the car engine, a decrease in its power, a change in gasoline consumption, the appearance of extraneous squeaks, squeaks, etc.

To prevent and prevent the operation of the gas distribution mechanism, it is necessary to periodically replace the timing belt, this will save the engine of the Volkswagen Polo car from damage, warn premature wear engine and increase its lifespan.

CAUSES AND ASSESSMENT OF WEAR OF THE TIMING BELT

Timing belt wear occurs for a number of reasons, avoiding which can extend the life of a car engine.

To prevent complete wear of the timing belt, it is necessary periodically, during a visual inspection of the gas distribution mechanism, to check for damage on the surface of the belt. To inspect and evaluate the belt drive, it is necessary to unscrew and remove the protective cover of the mechanism, under which the engine is hidden. The first signs of wear are:

• the appearance of oil and antifreeze smudges that can chemically destroy the timing belt, with prolonged exposure;
• the occurrence of longitudinal cracks on the back surface of the belt;
• the formation of transverse cracks on the inner surface of the drive belt;
• a ragged surface and a violation of the integrity of the edge are also a sign of wear;
• belt wear is also indicated by rubber dust on the surface of the part;
• if the timing belt teeth begin to peel off or wear out, the part must be replaced immediately with a new one.

SYMPTOMS OF A FAULTY TIMING BELT

1. Increased consumption of gasoline by car
2. Decreased engine power
3. Full stop of the car on the go, when you try to start the engine does not start, and the starter rotates easier than usual
4. Unstable operation of the engine Idling and in motion;
5. The occurrence of shots in the injector receiver and exhaust pipe

All these problems may indicate a shift in the valve timing and loosening of the belt tension. If on your Volkswagen car Polo you notice one or more of the signs from this list - immediately contact the service station for an inspection.

HOW OFTEN SHOULD YOU REPLACE A Volkswagen Polo Timing Belt?

The frequency of replacement of any consumables for cars depends on the style of driving and the mode of operation of the car. With extreme driving style and aggressive use of the vehicle, it is necessary to replace the timing belt as it wears out and the teeth wear out.

Under normal operating conditions, it is necessary to replace the original timing belt as scheduled, every 60 - 70,000 km. run. During this period, it develops its resource and becomes unusable. If an analog belt is installed on your Volkswagen Polo car, the replacement must be done a little earlier than the period recommended by the vehicle manufacturer.

WHICH TIMING BELT IS BETTER TO CHOOSE

Modern belts for the gas distribution system are a high-tech product, characterized by increased strength and wear resistance, capable of withstanding high dynamic loads. Timing belts are produced from neoprene or polychloroprene reinforced with strong fiberglass, nylon and cotton cords.

1. To avoid the mistake associated with buying a timing belt, contact the specialists who will help you order a timing belt suitable for your car engine using the WIN code of your car. This part is one of the most important in the design of the motor, the slightest deviation in the length, width, shape and size of the teeth can lead to malfunctions in the Volkswagen Polo engine.
2. Do not try to save money when buying a timing belt, a cheap product can be a low-quality fake that will quickly become unusable and can cause serious engine damage in the future. The best option for any car, there are original parts, their cost is higher than analog ones, but during the operation of the car they quickly pay for themselves.
3. When buying a timing belt, check it for stiffness, good belt should be elastic and easy to bend. The worse the belt, the more rigid it will be.
4. It is not allowed to have teeth, sagging, pores on the belt - these are signs poor quality belt which will quickly fall into disrepair. The surface of the product must be smooth, small burrs are allowed.
5. At self-purchase check the timing belt part number printed on the back side, it must match the WIN code of the car. If it is not possible to compare the code of the belt and the car, then it is necessary to visual comparison old and new belt, they must be completely identical.
6. To avoid buying a fake, try to purchase spare parts only from authorized, trusted dealers.
7. Don't save on qualified replacement timing belt, contact our certified car service, where competent mechanics will help with the repair of your Volkswagen Polo. And in the spare parts store you can buy original spare parts for your car.

The Volkswagen Polo Sedan 1.6 manufacturer has set a clear schedule for replacing the timing chain on this car - 80,000 km. But earlier wear of this consumable is quite possible. The reason for this may lie both in the driving style of the motorist, and in adverse driving conditions. The condition of the chain drive must be constantly diagnosed. This should be done after 25,000 km.

What causes a worn chain?

Driving with a worn timing chain is fraught with serious consequences. Of course, the chain is not a belt, and it is unlikely to break, but with a certain degree of wear, it may well come off the sprockets. Then the pistons will collide with the valves, which will lead to deformation of the latter. Pistons and cylinders will also suffer, and the car will have to be given overhaul. In addition, after a certain period of time, the chain will definitely stretch, and it will also have to be changed. In order not to forget when the last chain was replaced, you can put a sign under the hood with the appropriate inscription.

But what symptoms will indicate the wear of the chain drive:

• car won't start right away.
• extraneous noises are heard when the engine is on;
• the car began to consume much more fuel;
• motor power has decreased.

If one of these symptoms is detected, you should pay attention to the condition of the chain drive. Of course, there may be other reasons, but still, chain wear is quite likely.

To make repairs of this complexity is quite within the power of every motorist. Of course, you can turn to specialists. But similar repair not cheap ones. This is, firstly, and secondly, by personally replacing the chain drive, you get the experience that is so necessary for those who want to take care of their car.

If you decide that you will change the chain yourself, then stock up on everything you need. Go to the store and buy new ones there Consumables. In addition to the chain itself, most likely, tensioners and dampers will also have to be replaced. Prepare the necessary tools for repair:

• jack;
• spanners;
• set of heads;
• screwdrivers with different types of tips.

Now that everything is ready, you can proceed directly to the repair. Don't forget about safety precautions. Remember that it's very easy to get hurt or even hurt yourself when doing this type of repair, so be careful.

The process of replacing a chain drive without the involvement of specialists

As a rule, the replacement of the chain drive takes 4-5 hours. Of course, everything here will depend on the level of preparation of the motorist. So let's start.

1. We install the car on the overpass.
2. We remove protection from the engine.
3. We de-energize the car by disconnecting the left terminal from the battery.
4. We remove the air intake.
5. Now pay attention to the camshaft housing. It has a ventilation hose. It needs to be removed.
6. We also remove the check valve.
7. The oil separator is bolted to the cylinder block with two bolts. We unscrew them and remove the oil separator. The pipe must be brought out through the hole.
8. We remove the drive of auxiliary units.
9. Now you need to remove the refrigerant from the air conditioning system.
10. We pay attention to the clamps of the block of the wire harness of the air conditioner. You need to press on them and dismantle the block, slightly pulling it in your direction.
11. We remove pipelines of high and low pressure. Holes formed in their place must be immediately plugged. Be sure to do this, otherwise dirt will enter the system.
12. We also remove the air conditioning compressor. To do this, unscrew 3 bolts.
13. Remove the compressor bracket. It is also attached with three bolts.
14. Now you need to drain the oil from the engine system.
15. Dismantle the flywheel shield.
16. Remove the oil pan. Here you will have to tinker, as you will have to unscrew as many as 20 bolts.
17. The oil pan will also need to be removed. He may not give in the first time. To remove it, you need to make uniform blows with a hammer around the entire perimeter.
18. Now we take the mounting blade and fix the crankshaft with it so that it does not scroll. We unscrew the bolt that secures the crankshaft pulley. We remove the pulley.
19. We drain the antifreeze.
20. Now we remove the pulley of the pump that supplies coolant to the system.
21. We remove the power unit using a lift.
22. Remove the suspension support bracket, which is located on the right.
23. Now remove the chain drive cover. Don't forget to remove the gasket. Assess her condition. It may also need to be replaced.

24. We note the location of the chain drive, gears on the shafts.
25. Press the chain tensioner and fix it in this position.
26. Remove the chain tensioners, having previously unscrewed all the necessary bolts.
27. We remove the shoe, and after it the chain itself.

Assembly procedures should be carried out in reverse order. Be sure to check the operation of the engine. If uncharacteristic noises are heard, then something was done incorrectly, and the procedure will have to be repeated.

Video

On VW Polo cars, it is necessary to change the timing belt every 75-80 thousand km. It is recommended to check the belt every inspection for bending, fraying and stretching in order to avoid accidentally breaking the belt in the middle of the road.

The first symptom of a worn belt is a characteristic knock when the engine is running. Its unstable operation also affects (little power, stalls, poor reaction to the accelerator pedal). If the engine stalls and no longer starts, it is most likely the timing belt.

Tools

1. A set of wrenches.
2. Set of heads.
3. Ratchet.
4. Screwdriver cross and flat.
5. Hammer.
6. Gloves.

The procedure for replacing the timing belt takes from 3 to 6 hours, depending on the level of training and availability necessary tools. It is recommended to replace with specialized service centers. Instruction:

1. Place the car on a viewing hole or lifting box.
2. Remove the engine protection.
3. Disconnect the minus terminal from the battery.
4. Remove the air intake.
5. Disconnect the hose of the large branch of the ventilation system. It is located on the engine camshaft housing.
6. Extract check valve ventilation hose.
7. Disconnect check valve and crankcase gas hose.
8. Squeeze the fixing elements of the hose holder on the oil separator.
9. Unscrew and remove the two bolts securing the oil separator to the cylinder head.
10. Pull the pipe out of the hole.
11. Carry out dismantling drive belt auxiliary units.
12. Remove refrigerant from the air conditioning system.
13. Press on the locking elements of the block of the wire harness for turning off the air conditioning compressor.
14. Disconnect the block after pressing the latch by pulling it towards you.
15. Unscrew the bolts securing the flanges of the pipelines of high and low pressures to the air conditioner compressor housing. Dismantle pipelines. After removing them, you must immediately close the holes with plugs.
16. Remove the three A/C compressor mounting bolts.
17. Dismantle the air conditioning compressor of a VW Polo car.
18. Unscrew and remove from the threaded holes the three mounting bolts of the compressor bracket to the engine block of the car engine.
19. Remove the air conditioning compressor mounting bracket from the vehicle body.
20. Drain the oil from the engine lubrication system.
21. Remove the two bolts securing the flywheel or hydraulic transformer disc guard.
22. Remove the flywheel shield itself from the car.
23. Unscrew twenty bolts of fastenings of an oil crankcase of the car.
24. Take out the oil pan. To do this, it is necessary to apply light blows with a hammer around the perimeter of the pallet.
25. Unscrew the pulley mounting bolt, holding the engine crankshaft from scrolling. To do this, you need a mounting spatula.
26. Dismantle the pulley.
27. Drain the coolant from the engine cooling system of the vehicle.
28. Unscrew and remove the three screws securing the coolant pump pulley.
29. Remove the coolant pump pulley from the vehicle.
30. Hang the power unit using a lifting mechanism.
31. Disconnect the ground wire from the stud.
32. Remove the bracket for the right suspension support of the power unit from the vehicle.
33. Remove the timing chain cover.
34. Remove cover gasket.
35. Mark the location of the timing chain, camshaft sprockets and crankshaft sprocket. This only needs to be done in case of re-installation. When replacing with new belt, this procedure is not necessary.
36. Press the timing chain tensioner and lock it in this position. To do this, you need to mount the pin.
37. Unscrew the two bolts securing the belt chain tensioner and the timing gear.
38. Remove tensioner from vehicle.
39. Remove the timing chain tensioner shoe.
40. Remove the timing chain from the vehicle.
41. Assess the condition of the timing belt.
42. Replacing with a new timing belt and installing all parts is done in the reverse order of removal.
43. Adjust the gas distribution phases (recommended in service centers).
44. Check the vehicle's performance and the presence of extraneous sounds.

The procedure for replacing the timing belt is highly recommended to be entrusted to auto mechanics at service centers. Otherwise, if the belt is not installed correctly or if certain parts are not fastened correctly, this will provoke an even more in-depth and complex repair.

The importance of the timing belt on modern cars

Timing plays an integral role in the stable operation of the engine of any car. Malfunction or critical deterioration affects the entire car. He simply won't go. In the case of small engines (up to 1.4), a torn timing belt pulls out and bends the valve.

A drive belt is an element of a belt drive that serves to transmit torque. The transmission of torque occurs due to friction forces or engagement forces (timing belts).

in VW vehicles Polo sedan a belt drive is used that transmits torque from the crankshaft pulley of the CFNA (CFNB) engine to the pump (coolant pump), bypass roller, tensioner pulley, alternator pulley and air conditioning compressor pulley.

If you do not change the belt on the polo in time, what will happen?

During its operation, the Volkswagen Polo Sedan drive belt is pulled out. This is provided by the manufacturer, in connection with which a tensioner roller is installed in the drive belt mechanism.

However, the tensioner roller also has a limited stroke, when it reaches the limiter, the belt begins to slip in the Volkswagen Polo drive mechanism, as a result of which it heats up. Overheating leads to a broken belt.

If in time (according to the prescribed regulations) the drive belt is not replaced on a Volkswagen Polo with a CFNA (CFNB) 105 hp engine. (85 hp) equipped with an air conditioning system, this will break the drive belt, resulting in the following consequences:

In the absence of a drive belt, torque is not transmitted to the pump, respectively, the pump does not work (coolant supply pump). The lack of forced circulation of the coolant leads to overheating of the Polo sedan engine.
- in the absence of a drive belt, torque is not transmitted to the polo sedan generator. Accordingly, the electrical part of the car will work for some time from the car battery, until it is completely discharged.
- in the absence of a drive belt, torque is not transmitted to the air conditioning compressor, but this is not the most critical in this situation.

Thus, the most dangerous thing when the drive belt of the polo sedan breaks is the absence of forced circulation of the coolant, which quickly leads to overheating of the VW Polo sedan engine.

Replacing the timing belt polo sedan

Attention! On VW Polo sedan cars from 2010 to November 2015, engines with the letter designation CFNA (105 hp) and CFNB (95 hp) were installed. In these cars, the engines use a chain in the timing mechanism. Replacing the timing chain in the VW Polo sedan is not regulated by mileage and service life.

Replacing the timing belt is only possible in polo sedan engines installed from November 2015. Read more about CWVA engines here.

Volkswagen Polo cars use several engines. When a 1.6 liter engine is installed on the Polo sedan, the timing chain changes on the drive. On engines with a volume of 1.4 liters, a belt is used. In order not to make a mistake in the drive, just look at engine compartment. When installed belt, a plastic casing will be placed on it, but if the drive is chain, then it will be protected by a metal case.

Manufacturer's official dates

It is necessary to timely replace the timing drive on a VW Polo car. If the belt breaks, the engine will be severely damaged and will need to be overhauled.

If a belt is installed

Under normal operating conditions, the drive changes as planned after 90 thousand km.

During this time, he uses his resource and becomes unusable. Special attention you need to pay for new spare parts, since the life of the engine depends on their quality. Polo sedan is quite a popular car, so accessories are produced by many manufacturers.

It is advisable to make a choice in favor of original spare parts: this is guaranteed to save money on possible additional repairs.

The initial symptoms of a worn timing belt are:

• Slippage of the tension roller, followed by weakening of the belt tension;
• Overheating of the motor, which leads to boiling of antifreeze and frequent turning on of the fan to cool the coolant;
• A peculiar noise during the operation of the motor;
• Loss of power, engine stalls and does not start;
• The appearance of pops in the injector receiver and muffler;
• When inspecting the timing belt, cracks, wear of the profile track, and mechanical damage were found.

All such malfunctions indicate a shift in the valve timing and a weak drive tension. If at least one of the listed malfunctions is found, then you need to contact a service station to replace this important engine element.

Volkswagen Polo with timing belt

How many times to change the timing belt for a Volkswagen Polo also depends on what driving style, while how often it is used extreme driving. In such cases, it is necessary to change the timing belt as it wears out and the profiles abrade.

When replacing the timing drive, it is necessary to immediately change other related parts of this mechanism. In this case, it is recommended to use original products with the following article numbers for VW Polo with a CFNA 105 l engine.

Attention! Spare parts for Polo have a different cost, which depends on the manufacturer. In this case, it is recommended, despite the inflated price, to choose a proven and well-known manufacturer so that after replacement there is complete confidence in the reliability of the installed parts.

If a chain is installed

Since 2015, the Volkswagen Polo has rolled off the assembly line with a drive in the form of a chain instead of a belt. You can identify such an engine on VW Polo sedan cars by marking: CFNA - 105 hp. With.; CFNB - 95 l. With.

It would seem that a solution has been found for a reliable drive, because all segments of such an element are made of metal, and it is undoubtedly stronger than the material of the belt. But is it really so? How many times during engine operation do you need to replace the timing chain with a Volkswagen Polo? Why do some manufacturers recommend changing the chain every 60 thousand mileage or 3 years of operation, then every 30 thousand km or once every 2 years.

First, you need to consider the size of the engine. It is conventionally accepted on engines up to 1.4-1.6 liters to install a timing belt drive, and over 1.6 liters - a chain drive. How more powerful motor, the greater the load on this element, and the more often it is necessary to change the drive.

Secondly, on Volkswagen Polo cars, as a rule, a chain is installed on turbine engines, and a belt on simple atmospheric engines. At the same time, a hydraulic tensioner is used on engines with a turbine. Such a device automatically stabilizes the chain tension, that is, when this element rotates, the tensioner piston balances.

Attention! If the Polo has an engine with a timing chain drive, then the oil must be replaced every 8–10 thousand km.

Always clean oil in a turbine motor is necessary so that small particles of debris, sawdust, etc. do not get into the chain links. And the main reason is that debris does not get under the tensioner piston and it does not jam. Otherwise, if there is no balanced piston stroke, the chain drive will not work correctly and will quickly fail.

Volkswagen Polo with timing chain

Moreover, in Polo sedan engines with a turbine, the oil burns much faster than in conventional ones. power units. Thus, in order to avoid the question of when to change the timing chain drive to the Polo sedan, experts recommend focusing on diagnostics no longer on mileage, but on sound. As soon as the drive tension is loosened, an increased characteristic noise from the engine will appear.

Vitaly. 7. 06. 2018. Motor Volkswagen Polo Sedan 1.6. equipped with timing chain. The metal chain must prevent breakage and guarantee a longer service life. But in fact, it quickly stretched out and needs to be replaced already by 70 thousand km. A backstop is needed in this drive, otherwise it works only due to oil pressure, which is created only after the engine is started.

Oleg. 8. 08. 2018. Good afternoon. I have a motor installed on my VW Polo car with a timing belt, not a chain. With this run of 80 thousand km. I recommend replacing it, for such a drive it is absolutely appropriate.

Vladimir. 9. 08. 2018. On the Volkswagen Polo with gasoline engines 3.2 and 3.6, manufacturers write that the chain can be changed after 150 thousand km. But for me, replacing the drive chain is a fairly common procedure, because it is single-row and stretches quickly. I recommend, if there is a choice, then buy a car with a two-row chain, and then you can forget about the timing drive.

Vadim. 4. 08. 2018. The mileage on the Volkswagen Polo was 8 thousand km. An interesting observation: more fuel is consumed along the highway than in the city. The chain on the sedan is supplied in two rows, the manufacturer guarantees its resource of 120 thousand km. While everything is fine, there are no significant comments.

Anatoly. 09/12/2018. The right wheel bearing was replaced for maintenance. After 65 thousand km. began to notice the clatter of the chain on the cold. I went to the service station for preventive repairs - they say it's time to change your timing chain. I had to make a replacement, although according to the regulations it was still possible to drive the same amount.

Sergei. 18. 09. 2018. My Polo has already traveled 150 thousand km on one timing belt. And all due to my inexperience, it turns out that according to the instructions it was necessary to change it at 90 thousand km. Don't repeat my mistakes. However, I want to say thanks to the producers. Yes, the belt rustled, vibrated, worn out, but it didn’t break!