5.3.7. Heater blower motor WARNING Vehicles are equipped with safety systems (SRS), which include airbags and seat belt pretensioners. Before working around the shock sensors, dashboard and steering column, first disconnect the negative and then the positive terminals from the battery and wait 2 minutes. This will prevent unauthorized deployment of the airbags and the deployment of the seat belt pretensioners, which could cause injury. Turn off the ignition and disconnect ...

Replacement of the power steering pump UAZ 3163 /

8.5.5. Replacing the power steering pump You will need: keys "22", "27", a flat-blade screwdriver. 1. Remove the power steering pump drive belt (see "Replacing the power steering pump drive belt and the cooling fan drive viscous clutch"). 2. Unscrew the pressure hose fastening bolt ... 3. ... and disconnect the discharge hose from the pump. Note The connection of the pressure hose to the power steering pump is sealed with copper washers. Replace heavily compressed washers with new ...

Replacement of the power steering pump UAZ 31519 /

8.5.7. Replacing the power steering pump You will need: keys "17", "22". 1. Remove the power steering pump drive belt (see "Replacing the power steering pump drive belt and cooling fan pulley"). 2. Unscrew the pressure hose fastening bolt ... 3. ... and disconnect the hose from the pump. Note On some cars, the delivery hose has a tube that is attached with a nut to the pump union. 4. Unscrew the bolt-union of the suction wagon ...

Kia Sportage Cooling Fan Drive Bearing Replacement /

Replacement of the bearing of the cooling system fan drive PERFORMANCE ORDER Remove the alternator drive belt. Remove the fan impeller, then remove the fan drive pulley from the bearing assembly mounting flange. 1 - Impeller 2 - Pulley Loosen the fasteners and remove the bearing assembly (1) from the engine block. Using a special puller and a suitable punch, use a press to dismantle the drive pulley seat flange. 1 ...

Replacing the coolant VAZ 1111 /

3.5. Replacing the coolant The coolant drain plug is located above the dipstick tube, and the radiator drain plug is located on the right radiator reservoir under the coolant fan switch. You will need a 13 ”wrench to drain the coolant coolant funnel Warnings Use coolants recommended by the manufacturer (see appendix). The coolant is toxic, ...

Mercedes-Benz W163 (ML Class) crankshaft front oil seal replacement /

Replacing the front crankshaft oil seal 1 - ancillary drive belt, 2 - fan diffuser, 3 - fan and viscous clutch assembly, 4 - bolt, 5 - crankshaft pulley, 6 - special device, 7 - oil seal. 1. Remove the engine trim panel. 2. Remove the fan and viscous coupling in c6o 3. Remove the fan diffuser. 4. Remove the ancillary drive belt. 5. Remove the crankshaft pulley. 6. Remove the old crankshaft oil seal with a screwdriver. Not...

Checking the condition and replacing the timing belt - models 2.0 and 2.5 L Subaru Legacy Outback /

Checking the condition and replacing the timing belt - 2.0 and 2.5 L models Timing belt installation details 1 - Right rear timing cover 2 - Timing belt guide (only models with manual transmission) 3 - Crankshaft gear 4 - Left rear timing cover 5 - Toothed wheel of the right camshaft 6 - Intermediate roller No. 1 7 - Support bracket of the tensioner 8 - Intermediate roller No. 2 9 - Assembling the automatic ...

Replacing the coolant VAZ 2110 /

2.2. Coolant replacement GENERAL INFORMATION Warnings Change the coolant only on a cold engine. Coolant is toxic, so be careful when handling it. When starting the engine, the expansion tank cap must be closed. The coolant change is shown on the engine mod. 2111. PERFORMANCE ORDER 1. Place the car on a horizontal level surface. If the site has a slope ...

Infiniti QX4 Timing Belt Replacement /

4.6. Replacing the timing belt Do not bend or twist the belt! After removing the timing belt, do not turn the crankshaft and camshafts to avoid damage to the internal components of the engine as a result of the impact of the valves on the piston crowns! Before installing the belt, thoroughly clean all the timing gears, completely removing dirt, grease and moisture from them! The timing belt must be installed on a cold engine! Details ...

Checking the condition, removing and installing the cooling system fan Toyota Land Cruiser /

Checking the condition, removing and installing the cooling fan Avoid touching the impeller blades with your hands, tools and items of clothing. To avoid personal injury or property damage, do not start the engine with a defective fan. Do not attempt to repair broken impeller blades, replace the complete impeller! Check PERFORMANCE ORDER 1. Check the fan impeller for cracks, paying special attention to the condition of the base ...

Replacing the drive belt of the power steering pump and the fan pulley of the cooling system UAZ 31519 /

8.5.1. Replacing the drive belt of the power steering pump and the fan pulley of the cooling system You will need: keys “10” (two), “17” (one). 1. Loosen the two bolts securing the power steering pump tension plate. 2. While holding the tension bolt with a wrench, loosen the nut and lower the pump down. 3. Remove the belt. 4. Install the new belt in the reverse order of removal. ...

Replacing the drive belt of the generator UAZ 3163 /

10.4.3. Replacing the alternator drive belt You will need: keys "10", "12". 1. Remove the power-assisted steering pump drive belt (see "Replacing the power-assisted steering pump and viscous clutch cooling fan drive belt"). 2. Loosen the tension roller mounting bolt two to three turns. 3. Unscrewing the adjusting bolt, loosen the belt tension ... 4. ... and remove it. 5. Install a new belt and, rotating the tension roller bolt, achieve a belt deflection of 15 mm under a load of 80 N (8 kgf), ...

Replacing the drive belt of the UAZ 31519 generator /

10.4.4. Replacing the alternator drive belt You will need: keys "10", "12". 1. Remove the power-assisted steering pump drive belt (see "Replacing the power-assisted steering pump drive belt and fan pulley"). 2. Loosen the tension roller mounting bolt two to three turns. 3. Unscrewing the adjusting bolt, loosen the belt tension ... 4. ... and remove it. 5. Install a new belt and, rotating the tension roller bolt, achieve a belt deflection of 15 mm under a load of 80 N (8 kgf) applied in the middle of the belt branch between ...

Replacement of coolant Mercedes-Benz W210 (E Class) /

Changing the coolant WARNING Burns can occur if the engine is hot. STEPS OF WORK 1. Carefully remove the cap of the expansion tank. 2. Relieve excess pressure from the cooling system. 3. Set the heating control on the dashboard to "Heiss" (hot). This opens the cooling circuit of the heating system. 4. Remove the crankcase protection. 5. Place the collection container under the radiator and the engine, on the bottom of the radiator, unscrew the drain plug (Fig. 4.45) and drain the coolant. On pcs ...

Checking the condition and replacing the water pump Nissan Maxima QX /

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Replacing the drive belt of the generator and water pump UAZ 31519 /

5.7. Replacing the alternator and water pump drive belt You will need: keys "for 10", "for 12". 1. Remove the drive belt of the power steering pump, viscous clutch pulley and crankshaft pulley (see "Replacing the drive belt of the power steering pump and the cooling fan pulley"). 2. Loosen the idler roller mounting bolt two to three turns. 3. After unscrewing the adjusting bolt, loosen the belt tension and remove it. 4. Install a new belt; screwing in the tension roller adjusting bolt, add ...

Checking, replacing and adjusting the drive belt of the water pump and alternator Mercedes-Benz W123 /

Checking, replacing and adjusting the drive belt of the water pump and generator Every 24,000 km, check the drive belt and adjust its tension. Inspect the belt along its entire length for possible cracks and wear, and crank the engine to check the belt surfaces in contact with the pulleys. Replace the defective belt. PERFORMANCE ORDER On cars with power steering, air conditioning system (compressor), their drive belts should be removed first. Disconnect the ground wire & ...

Mercedes-Benz W210 (E Class) fuse replacement /

Replacing the fuse SEQUENCE OF WORK 1. If you need to replace the fuse, you can use the plastic tweezers, which is included in the standard tool kit. 2. Remove the blown fuse from the contacts with tweezers. 3. Insert a new fuse of the same rating into the contacts. Make sure the contact is reliable. 4. If the new fuse immediately blows, refer to table. 9.1, whether a fuse with a smaller rating than required has been installed. 5. If everything is correct, determine the electrical connected to the circuit using the table.

To supply the electrical systems of the car with energy, each car has two power sources - a DC battery and a three-phase alternator equipped with a powerful rectifier bridge. But in order for the latter to start producing current, it must be made to spin. This is done with the engine running using a crankshaft and a belt. Often the latter requires replacement.

Belt drive: advantages and disadvantages

The alternator belt drive refers to transmissions called flexible coupling. The drive includes two pulleys - the leading one is attached to the end of the crankshaft, the driven one is mounted on the generator shaft, as well as the belt thrown over them. The transmission of torque is carried out by means of frictional forces.

Alternator belt types

Since different brands of passenger cars have engines of different types, three types of alternator belts are used in them:

• wedge (in cross-section they have the shape of a trapezoid, are capable of transmitting significant forces, withstand large overloads);
• poly-wedge (wide, with longitudinal grooves, have reverse flexibility and are used to transmit rotation to several devices);
• gear (on the inside they have transverse grooves and are endowed with the ability to accurately observe the gear ratio).

A separate belt drive of the powerful 3-phase generator of a modern passenger car is a poly-V-belt consisting of many longitudinal V-shaped teeth located on the inner side of a flat endless base. The main condition for the stable operation of the generator belt is the mandatory presence of a tensioner. The tension roller or the generator itself acts as it.

V-ribbed belt transmission has both advantages and disadvantages.

Advantages

• small weight and small thickness allow the belt to be used in drives of motors with high speed;
• increased back flexibility allows you to simultaneously transfer rotation to the hydraulic booster, water pump, generator, air conditioning compressor;
• has increased resistance to cracking;
• protects the generator from shock and peak loads during engine start and stop;
• protects the generator from overload by slipping the belt in the pulleys;
• stable transmission of torque with a significant distance between the crankshaft and generator pulleys;
• simplicity of design;
• smooth and quiet operation;
• no lubrication required;
• low cost combined with a long service life.

disadvantages

• shaft ends with pulleys and thrust bearings are under the influence of decent forces arising from strong tension;
• when heavy loads occur, there is strong wear of the side surfaces due to slippage;
• service life depends on correct tension;
• the mechanism cannot work normally when oil gets on it, so protection from any kind of lubrication is required.

Alternator belt design and material

The V-belt consists of 5 layers

The product must have the following characteristics:

• high strength with significant load fluctuations;
• good wear resistance;
• the maximum coefficient of adhesion to the working surfaces of the pulleys;
• be flexible but tough.

V-ribbed belt consists of the following layers

The generator drive is made in the form of an endless flat belt, on the inner surface of which there are longitudinal wedge-shaped ribs. This design combines the elasticity of the flat and the increased traction of the V-belt. The basis is a cord reinforced layer of synthetic cords covered with a rubberized high-strength rubber fabric. This design is practically not subject to stretching.

When to change the alternator belt

Modern technologies make it possible to manufacture a generator belt so strong that it can operate reliably for a long time - several tens of thousands of mileage. Many manufacturers set a standard for the obligatory replacement of the alternator belt at 80-100 thousand kilometers. But control over the state of this important element of the generator drive should be. Common practice: Visual inspection for cracks and edge breakage when a sustained whistling sound occurs. Burrs and misalignment on the pulleys and improper tension can cause premature damage. The break will be signaled by two control lamps. The first is about the lack of battery charging. The second is about a sharp increase in the temperature of the coolant (for example, on a classic, a water pump and a generator work from one consumable).

What to do if it breaks

Torn alternator belt

If the belt breaks on the road, and there is no spare, the situation will be quite serious. Especially difficult at night. You can only move in tow with the engine off, which is very dangerous. If during the day, then a short distance can be traveled on a battery, turning off all unnecessary sources of current consumption: light, radio tape recorder, stove, navigator and other devices. In a desperate situation, you can try to use the tools at hand:

• cut the torn one lengthwise in half, fold the halves together and make a circle of the desired length, wrap both halves with strong twine;
• waist belt, the ends of which are fastened with wire;
• women's tights, tie the ends with a tight knot;
• strong rope, wrap the ends with strong twine;
• harness from the car camera, wrap the ends with twine or wire.

How to choose the right one

If the belt begins to deteriorate from prolonged use or severe wear, it must be replaced immediately. The main criterion is the length, which can be found from the catalog, knowing the catalog number of the part of this car brand and its configuration. For example, the length for the VAZ 2110-2112 brand is different for different models:

• for 8 and 16 valve engines, including those of Priora, with a minimum configuration - the length is 742 mm;
• for a 16 valve engine with hydraulic booster - 1115 mm;
• for models equipped with air conditioning - 1125 mm.

The marking is applied to the outside of the belt

The length can be found from the markings that are applied to the outer surface. It is recommended to buy an original product from the manufacturer whose products are used to complete the vehicle on the assembly line.

Generator poly V-belt manufacturers

V-ribbed belt for generator GATES

American GATES Firm and its products are the most famous among all the manufacturers of poly V-belts. GATES spare parts are supplied to assembly lines of cars and trucks in Italy, France, Germany, Sweden, Japan, Korea, USA and other countries. Her belts are of high quality, durable, but quite expensive. This brand is most often counterfeited by unscrupulous manufacturers of low-quality consumables.

German continenta firml is also well known for the quality of its products.

German bosch has an excellent reputation in the world for many products, including multi-ribbed belts.

American dAYCO company takes the 2nd place on the belt market and supplies its products to assembly lines of automobile concerns in Italy, France, Germany and other countries. Original DAYCO products are trusted by consumers not only among motorists in European countries, but also in the USA, Asia and Africa.

PJSC "BalakovoResinoTechnika" - Russian manufacturer of original rubber products for conveyors of VAZ, GAZ and KamAZ. Owners of LADA, Volga, Gazelle and other domestic brands are willingly buying its products for generators.

DIY alternator belt replacement

An experienced driver always carries a spare part of the correct size and type. It is not difficult to change it if you have the necessary tools and minimal locksmith skills.

Video: Replacing the belt and roller on Renault Megan 2

The procedure (replacement is performed with the engine off and the battery terminal removed) is as follows:

• provide access to the belt, for which it may be necessary to remove the front wheel, the engine mudguard, and for some brands - the crankcase protection; for an injection engine, it is necessary to remove the crankshaft position sensor;
• loosen the belt tension, for which loosen the bolt (or nut) of the tension roller or the generator itself;
• fix the belt layout in memory if it drives several devices simultaneously;
• you need to remove the old belt from the uppermost pulley, then compare it with the new one - they must be identical (there should be no discrepancy in the profile and length);
• find out the cause of the belt damage and eliminate it;
• to put a new belt in place, you need to start with the crankshaft pulley, then throw it on the generator and, last of all, on the water pump; then you need to adjust the degree of tension (when pressing with a finger with a force of 10 kg, the sag should not exceed 10 mm);
• put the battery terminal back in place, start the engine and turn on the headlights, stove, air conditioner and other powerful current consumers (there should be no whistling, knocking, noises; the headlights should shine exactly at any speed);
• put in place the parts that were removed at the beginning.

Video: Checking and replacing engine aggregate belts

Signs of incorrect replacement

If the belt is over-tightened, then the load on the bearings of the generator shaft will increase, and it will begin to brake the shaft. The effort to rotate the generator will increase, the load on the crankshaft will increase, and fuel consumption will increase.

If it is not fully tensioned, it will begin to slip and the generator will rotate at a lower speed. Under heavy load, the slip part starts to whistle. To get rid of the whistle is simple - you just need to tighten the belt.

If it rotates on displaced or bent pulleys, then vibration occurs due to the beating of the pulley. It can also be caused by faulty bearings in the idler pulley or generator. A low-quality cheap belt can also vibrate when it starts to stick to the pulley surface. If vibration is not eliminated, the consumable will tear very quickly.

Video: Cold noise and belt vibration

Replacing the alternator belt yourself is not difficult, even a novice car enthusiast can do. If you do everything in a timely manner, without haste, carefully, there should be no harmful consequences for the car.

The car engine is equipped with attachments (generator, air conditioning compressor) driven by a poly V-belt. Over time, the product wears out and cracks, which can lead to rupture. The need to change the alternator belt on your own may arise if the trouble happened on the road and away from the service.

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When should you change the alternator belt?

The frequency of replacing the generator drive belt is indicated in the vehicle's service manual. Please be aware that the period for one machine delivered to different markets may differ. This is due to different climatic conditions and dustiness of the air, which additionally destroy the material of the product.

For example, Volvo recommends making an initial replacement after 80 thousand kilometers, and each subsequent change is performed after 60 thousand kilometers. At the same time, on a car from the European market, the belt changes every 180 thousand km. On VAZ cars, the product rarely serves more than 30 thousand kilometers.

A typical sign of a stretched belt is a whistling sound when the engine is started or after driving through a puddle. The source of the sound is the strap material slipping over the surface of the pulley. Usually, the whistle quickly disappears and appears again when the engine is started or after another puddle. In this case, the owner needs to check the belt tension and try to bring it to standard.

Worn belt (right)

What affects wear?

Factors affecting the drive belt life:

1. Product operating conditions. Dust, abrasives or chemicals will significantly reduce the life of the strap. Long-term operation at low air temperatures negatively affects the material.
2. The condition of the pulleys. The occurrence of beating or deformations leads to the destruction of the tracks and edges of the belt.
3. Tension. With reduced or excessive tension, the belt wears out at an accelerated rate.
4. Belt production date. Rubber is susceptible to aging, so the strap can deteriorate while in the packaging in the warehouse. An additional negative impact is provided by violations of storage rules.
5. Belt manufacturer. There are products made by small companies from low-quality materials. Such straps can collapse after several thousand kilometers.

Signs of belt wear and product replacement are demonstrated in a video filmed by Vladimir Bazekin.

How to check the belt?

The condition of the belt should be checked not only when a whistle appears, but also periodically. Most car manufacturers recommend a visual inspection of the condition of the strap and tension every 6 months or 25 thousand kilometers. It doesn't matter if the car is in use or parked.

Approximate test sequence:

1. Open the hood of the vehicle. located on the side of the crankshaft pulley. It is necessary to check the condition and tension carefully, without bringing your hands to the cooling system fans. This is due to the fact that the fan can start at any time, even on a cold engine.
2. The visual condition is checked by turning the inside of the belt towards the light. Cracks, abrasions and delamination of the product are inadmissible. If damage occurs in a small area, the belt is considered unsuitable for further use. The element is pulled by scrolling the crankshaft by the central nut.
3. The tension is checked by measuring the deflection under a load of 10 kg. With a distance between the axes of the pulleys up to 300 mm, the deflection should be 6 mm. With a distance between the axes within 300-450 mm, a deflection of 12 mm is allowed.

It is possible to check the tension of the alternator belt by applying the maximum load, i.e. by turning on all energy consumers except the starter. If the whistle does not occur, then the tension is sufficient.

How to tighten the belt

If there are no cracks or tears on the belt surface, then you can try to tighten it. A similar procedure is relevant for Russian-made cars and foreign cars equipped with a mechanical manual tensioner, which is often the generator itself. The belt is tensioned until the moment of stopping slipping on the pulleys. In this case, the motorist must remember that excessive interference loads and puts them out of action.

If the strap tension does not allow for normal operation, then the part must be replaced. It is forbidden to install spacers under the tension rollers, which will allow you to select an excessive belt length.

Instructions for replacing the drive belt

Replacing the alternator drive belt does not cause problems for most motorists. After removing the worn strap, it is recommended to inspect the wear pattern. If there is damage to the edges and the contact part, then this may indicate a misalignment of the pulleys. In this case, you need to find the damaged element and replace it. Installing a new belt on a damaged pulley is pointless, as the rubber will quickly wear out on the sharp edges. When changing the strap, follow the sequence of steps recommended by the vehicle manufacturer.

When replacing the alternator drive belt, it may be necessary to install a new idler pulley and associated fasteners. For a list of parts to be replaced, refer to the vehicle repair and maintenance manual.

What do you need to replace?

Before changing the alternator belt, you will need to prepare a set of tools and materials (the maximum list is given):

• wrenches and heads;
• new belt and tensioner pulley;
• rod for fixing the roller;
• mounting paddle for belt removal;
• protective gloves;
• sheet of paper and a pencil for drawing the installation diagram.

A new non-original drive belt can be several millimeters longer than the original product. The difference in length will be compensated by the tensioner.

Scheme

Installing a belt on engines with two or three pulleys is straightforward. The situation changes when the belt is installed on a motor equipped with a large number of pulleys. In this case, it is recommended to draw a diagram of the installation of the product. Such an event will speed up the installation process and avoid errors.

An example of a belt pad on a Chevrolet Cobalt

Scheme designations:

• 1 - crankshaft pulley;
• 2 - alternator pulley;
• 3 - guide roller;
• 4 - air conditioner compressor clutch;
• 5 - a pump pulley and an additional drive pulley for the amplifier pump;
• 6 - belt;
• 7 - tension roller.

Algorithm of actions

The procedure differs depending on the engine design and the number of attachments. Below are step-by-step instructions for replacing belts on common vehicles. On other vehicles, the operation takes place using a similar technology.

By car VAZ Grant

You can change the belt on a VAZ Grant car without a tensioner using the algorithm:

1. Cut the old strap with a knife.
2. Turn the generator mounting bolt from below by 3-4 turns.
3. Unscrew the upper fixing bolt completely and remove it from the hole.
4. Push the generator forward until the retaining ear is inserted at the bracket.
5. Secure the mechanism with wire or otherwise.
6. Slide the belt over the alternator pulley and the top of the crankshaft pulley. Some car owners use an additional device that holds the strap on the device during donning.
7. Turn the engine shaft with a wrench to fully fit the belt.
8. Fix the generator in its original place. Check the operation of the units with a full load of the generator and different speeds of the crankshaft.

On Kia Sid

You can change the alternator belt as follows:

1. Unscrew the fixing bolt located on the top of the generator.
2. Lift the retainer upward by removing the bolt from the guide slot.
3. Turn the device relative to the lower bolt. If the mount is "stuck", then the generator is turned with light hammer blows applied through a wooden block.
4. Remove the worn belt and pressure roller.
5. After that, you need to mount a new roller and only then you can put on the belt.
6. Tighten the strap in accordance with the recommendations of the instruction manual. Check the operation of the unit, when a whistle appears, slightly increase the tension.

Volkswagen Polo Sedan

An example of replacing a belt on a Volkswagen Polo Sedan engine equipped with an automatic tensioner:

1. Loosen the belt tension by loosening the tension roller fixing bolt. Nut size 16 mm.
2. Turn the roller mounting bracket counterclockwise. The turning is forceful because the tension spring is compressed.
3. Carefully remove the belt from the crankshaft pulleys and drive units.
4. Dismantle the roller with a 16 mm head inserted into the recess under the generator. If the tension roller does not change, then it is fixed in the wringing position using a metal rod inserted into the hole in the housing.
5. Put the belt on the pulleys, then gently release the tension roller. The tensioner automatically adjusts the tension level of the product.

Video "Maintenance and replacement of the alternator belt"

Service and replacement of the alternator belt is shown in the video tutorial filmed by the avto-blogger channel. ru.

Periodically check the tension and condition of the fan drive belt and the power steering pump, the generator and the ZMZ-5143 engine cooling system pump on the UAZ-315148. Replace drive belts if damaged or overstretched.

Do not tension the fan drive and power steering pump in the following sequence:

- Loosen the power steering pump mounting bolt, roller nut and adjusting unit locknut. Turning the tensioning bolt, move the power steering pump to the normal belt tension.
- Check the belt tension by applying a load of 8 kgf in the middle between the fan and pump pulleys, while the belt deflection should be 8-9 mm. Tighten the power steering pump fasteners, the roller nut and the adjusting unit locknut.

Replace the fan drive belt and power steering pump on the UAZ-315148 in the following sequence:

- Loosen the power steering pump mounting bolt, roller nut and adjusting unit locknut. Turning the tensioning bolt, loosen the belt tension.

Tensioning and replacing the alternator belt and the cooling system pump on the UAZ-315148.

Tension the drive belt and the coolant pump in the following order:

- Loosen the tension roller mounting bolt. While tightening the bolt that moves the pulley, set the idler pulley to the position that provides the required drive belt tension.
- Check the belt tension by applying a load of 8 kgf in the middle between the pulleys of the generator and the water pump, while the belt deflection should be 13-15 mm.
- Tighten the bolt of the tensioner roller on the axle.

Replace the drive belt of the generator and the system pump on the UAZ-315148 in the following sequence:

- Remove the fan and power steering pump drive belt.
- Remove the upper and lower casings of the injection pump drive belt.
- Remove the pump drive belt.
- Loosen the bolt of the tensioner roller on the axle.
- Loosen the belt tension by unscrewing the tension roller movement bolt.
- Replace the belt and tension it as described above.
- Tighten the tension roller bolt on the axle and install the high pressure pump drive belt and high pressure pump drive belt covers.
- Install the fan and power steering pump drive belt and tension it.

The main problem with the wear of the drive belts at the initial stage is various creaks and twists, during the rotation of the pulleys, transmitting to the engine attachments. If squeaks and whistles occur, soon one of the drive belts may break. We offer you detailed information on these types of belts in modern cars. Our guide will help you find out when it is necessary to change drive belts, how to determine the degree of their wear, how the drive belt differs and what is the average cost of drive belts on the Russian market, as well as get answers to other questions related to these belts.

First, let's dot the i's to find out what drive belts are.

Car drive belt is an element of a belt drive, a working part of vehicles and mechanisms, which serves to transmit engine torque.

The transmission of torque takes place through frictional forces or meshing forces (toothed belts, V-belts).

There is a misconception that, does not apply to drive belts. But actually it is not. Timing belt also belongs to the category of drive belts.

Drive belts are divided into several types:

Timing belt (timing belt drive)

Accessory Drive Belts (Engine Attachment)

There are three types of car belts:

Thanks to the rotation of the generator, electricity is generated, which keeps all the electrical equipment of the car running.

Also, in many modern cars, this same type of belt is used to transmit torque to the electric power steering, cooling fan, to the water pump (coolant pump), to the air conditioning compressor and to the classic power steering. Since the belt is subjected to tremendous stress and constant temperature fluctuations, it is usually made of tough rubber and a metal core, which provides the belt's strength and durability. Also, many belts have a strong textile thread that allows the belt to withstand high torque transmission.

So, in addition to a timing belt (some cars also use a timing chain), each car has one or more belt drives (depending on the technical features of the car), which ensure the operability of the engine attachments.

If the drive belt is cracked (consequences)

If your car (or belts) are worn out, they will have cracks and scuffs on the surface. As a result, a whistle will begin to appear during their movement. In this case, the time has come for their planned replacement. Remember that if you do not change the drive belt on time, you run the risk of being left without functional vehicle equipment. For example, if the service life of a belt has expired due to serious wear, then sooner or later it will naturally break off.

Typically, when the drive belt breaks, you will hear a loud pop from under the hood. As a result, the equipment that received torque from it will cease to function. For example, if the drive belt that supplies the generator breaks, it will stop supplying all electrical equipment in the vehicle. As a result, you will see the battery icon lit up on the dashboard.

Also, if the belt breaks, the hydraulic booster will stop working. As a result, your steering wheel will turn very hard. But the most important problem when the drive belt breaks is the lack of transmission of rotation to the water pump, which contributes to the circulation of coolant through the engine cooling system. As a result, the engine can quickly overheat. In this case, you must immediately stop driving and turn off the engine.

Therefore, while driving, constantly monitor the engine temperature sensor, which should show the same temperature of 90 degrees. If you see that the temperature arrow has gone up and is approaching the dangerous red zone, then you must stop and, turning off the engine, diagnose the cooling system.

Attention! Overheating of the engine can lead to its failure (damage to the valve stem seals, failure of the head gasket, damage to the piston system). Therefore, do not allow in any way by monitoring the engine temperature on the dashboard.

What determines the service life of the drive belts?

Modern drive belts have enough thanks to their construction from modern reliable materials. On average, a quality belt can last up to 25,000 hours of use. Note that the lifespan is indicated in hours, not kilometers, as mileage does not directly affect the lifespan of drive belts. After all, these belts are in motion even when the car is stationary and the engine is running at idle.

But this is in theory, and according to information provided by belt manufacturers to consumers.

In practice, the service life of the drive belts can vary significantly from that stated by the manufacturer. The fact is that many factors affect the wear of drive belts. For example, the way it was installed on a car plays an important role in the long service life of a belt. For example, it is not uncommon to try to fit a belt onto a pulley using a screwdriver. As a result, the new belt is damaged and will no longer be able to last as long as the manufacturer claims. A similar method of installing the drive belt is also used in order to speed up the replacement process so as not to remove the pulley.

In addition, the storage and transport conditions of the components affect the belt life. For example, it is not uncommon for car dealerships to sell expired drive belts. Yes, drive belts have. The fact is that the chemical composition of the materials of the drive belts changes over time. And if the drive belt was produced 5 years ago and was stored incorrectly in the warehouse, then when it is installed on a car, it will not last very long.

Also, weather can affect the durability of belts in a car. For example, if you live in a hot climate, then you often use air conditioning. This means that the A / C compressor must receive. As a result, the belt that transmits torque to the air conditioning compressor experiences an increased load.

Including drive belts can quickly wear out if the machine is operated for a long time in cold weather. For example, in the winter, the electrical equipment of the car requires more power than in warm weather.

As a result, the generator needs more energy to keep the vehicle's electrical system working. As a result, the alternator belt is under increased stress due to the increased torque.

As a rule, drive belts last longer in a new car because they were installed at the factory and all storage conditions were met prior to installation. After replacing the factory drive belts, the service life of the belts is reduced.

Each car manufacturer in the technical documentation and service book usually indicates in routine maintenance when it is necessary to replace drive belts on a scheduled basis. Therefore, we advise you to carefully read the list of scheduled technical inspections and the procedure for replacing consumables. As a rule, the manufacturer indicates the maximum mileage at which the technician must replace the drive belts in the technical center. This will give you a rough estimate of the service life of the drive belts. But this does not mean that you should not regularly check the condition of the belts. More on this below.

Regular check of drive belts

Periodically, every car owner should check the condition of all drive belts and their tension. To do this, check the belts with your finger with the engine off. For example, by pressing your finger on the belt, you can tell if the belt tension is loose. Remember that the belt should not move during this inspection (it should shift by 1-2 cm). If you see something like this, then the belt tension is weak. You should also feel the belt for damage. A visual inspection is also necessary for chips, cracks and torn elements.

Also, use a flashlight, which will not only give you a better view, but can also help identify worn areas of the belt (usually, the worn belt will shine).

In any case, if you see damaged parts of the belt, then in any case it must be replaced with a new one. Please note that when purchasing new drive belts, you do not need to purchase original consumables. There are many non-original belts on the market, which are often even superior in quality to factory originals. For example, Continental has proven itself as the largest supplier of power transmission belts.

The average cost of replacing a belt in a car workshop is about 2,500 rubles. belts for a car depends on the brand awareness and production cost. There are both cheap drive belts on the market and expensive ones that have a special design and are able to withstand extreme loads.

How to tension, tighten or loosen a drive belt

If the whistle, squeal or squeak is caused by a belt that is loose, as a result of which it slips on the pulleys, then if the belt is not damaged or damaged, it is necessary to tighten the belt in order to remove the extraneous sound.

In the example of a belt, generators, this is done using a special adjusting bolt (on modern cars) or using an adjusting bar (on older cars).

For example, to tighten the alternator belt on a modern car, you need to do the following:

- Loosen the generator mounting bolts slightly (upper and lower mounting)

- Turn the adjusting bolt clockwise, moving the generator away from the engine block and immediately checking the belt tension

- Then shade the nuts of the generator fasteners

Please note that in some car systems, the process of tensioning the drive belts is too laborious and requires the use of a special tool.

Attention ... A new generation of multi-ribbed elastic belts is now widespread in the market and in many vehicles. For example, one of the world famous manufacturers of such belts is Elast. Their products have proven themselves in the best way. This company is the official supplier of many car factories. Elastic V-ribbed belts do not require tensioning and tightening, etc. Due to their construction and material, such belts do not stretch. Typically, these drive belts last about 120,000 kilometers.

But for its initial tension, a special tool is needed.

Many cars also use special belt tensioning rollers, which saves drivers from constantly tightening the belts. The only drawback of this design is, as a rule, when replacing the drive belts, it is also necessary to change the tension roller, since its reuse together with a new belt is impossible.

Replacing drive belts at the technical center

How can you temporarily replace the drive belts in the event of a car breakdown on the track?

Unfortunately, it is impossible to temporarily replace the drive belts with something in the event of a break on the track, in modern cars. In old cars, women's tights sometimes helped with a similar problem. But those days are gone. If the drive belts break, you will need technical assistance.