How to remove the belt pulley from the crankshaft. How to remove the crankshaft pulley with a puller and in which direction to unscrew? Where is the crankshaft pulley and how to get to it

The crankshaft pulley is an important part of the engine, the failure of which leads to the impossibility of operating the entire vehicle as a whole. Like all elements, the crankshaft pulley is designed to perform certain functions and tasks, the list of which is presented below:

• decrease in the amplitude of the resonating crankshaft;
• noise reduction from a running motor;
• rotation of the mechanisms of a running engine;
• transmission of pulses about the number of revolutions of the crankshaft to the on-board computer.

The operation of the internal combustion engine and the entire car as a whole becomes impossible without a properly functioning crankshaft pulley. Due to the large functionality and scope of work performed, this part, like no other, is subject to wear. As a result, replacing the crankshaft pulley becomes a logical step for a responsible motorist.

Reasons why you may need to replace the crankshaft pulley

During long-term operation vehicle crankshaft pulley replacement may be required in the following cases:

• oil leak in front oil seal crankshaft;
• the appearance of a strong resonance;
• the appearance of damper play;
• mechanical damage to the damper seat;
• when removing the crankshaft.

Crankshaft pulley replacement cost

Book a free engine diagnostic

All identified problems must be eliminated in the appropriate conditions:

The result, to which a timely replacement of the crankshaft pulley can lead, is very deplorable - it can also be a belt delamination attachments, and the penetration of the strings of the damaged belt under the timing belt, which in turn can cause the valves to bend. All this leads to a complex expensive repairs, waste of personal time and nerves.

The operating period of the crankshaft pulley and signs of its malfunction

When the time comes scheduled maintenance the serviceability of the accessory belt should be checked. Scheduled maintenance for many vehicles is scheduled for every 60 thousand kilometers, during which it is advised to dismantle the crankshaft damper pulley. It should also be noted the basic signs of its malfunction:

• delamination of damping rubber;
• displacement of the outer race of the pulley to the polymer motor cover;
• visible traces of overheating;
• excessive wear or mechanical defects on the accessory belt.

Every motorist knows perfectly well that most breakdowns and technical operations you can do it yourself and save a lot of money. In this article we will talk about how to remove the crankshaft pulley without contacting service center. We will consider in detail all the nuances, analyze the main problems and methods for solving them.

Where is the crankshaft pulley

The crankshaft pulley is hidden behind the generator. At the bottom of the engine compartment there is a disk that is tightly fixed on the clutch shaft, it is the pulley. By design, this segment is divided into two types: conventional or with a damper. The latter have an additional outer massive ring with a rubber gasket, which provides improved vibration absorption. At first glance, the procedure may seem completely simple. However, there are several nuances.

It is necessary to fix the crankshaft so that it does not rotate. The high compression force of the fasteners also causes a lot of trouble. When installing, the pulley bolt is twisted with a sufficiently large force. So that it does not spontaneously unscrew, the degree of clamping gradually increases during operation. power unit. Such a fastening system is determined by the need for increased reliability of fixing the nuts. After all, in case of accidental unscrewing, serious damage can occur, due to which costly repairs cannot be avoided.

How to unscrew the pulley nut in rear-wheel drive models

The pulley is held by a nut that is placed on the end of the crankshaft. Such a design solution is presented in all VAZ rear-wheel drive vehicles in models from 2101 to 2107, Niva, etc. This fastener is also called a ratchet due to the presence of a ledge for a crooked starter.

For maximum convenience in performing this work, it is recommended to place the machine above the inspection hole. To fix the crankshaft, you need to put the gearbox in the 4th gear position and turn it on hand brake. In the process of work, we will need the following tools:

Socket or overhead key for 38 or 36, depending on the mounting unit.

Lever extension. It can be a mount or a piece of pipe that will facilitate the process, increasing the effectiveness of your efforts.

If you cannot unscrew the nut with the lever, do the following:

We remove the candlesticks, and set the key with the lever so that its end rests on the floor, preventing rotational operations.

Then you need to apply a short-term impulse to the part. To do this, turn the key in the ignition.

The nut should move, if not on the first, then on the second attempt. After that, it can be easily unscrewed with a regular key.

How to unscrew the pulley bolt in front-wheel drive models

The bolt as a fastener for the crankshaft pulley is used in front-wheel drive vehicles. In such models, the block is placed perpendicular to the axis of the car. Unlike the dismantling of the nut in the rear-wheel drive modification, this method requires more time due to the need to remove additional parts. To perform the work, you need to prepare the following tools:

Why are special technological holes made in pulleys? In auto repair shops, there is a special device for fixing the shaft, which must be bolted to the pulley and lock the shaft.

If there is no special device for fixing the shaft, which is screwed to the pulley, then you need to put good recoil devices under the wheels of the car and put 4th gear on the gearbox.

Or, the third option is to rest the mount against the teeth of the flywheel and fix crankshaft from turning while loosening the pulley nut.

Another option is to insert a pin into the pulley hole, and install a mount on the pin and the second stop, as in this figure.

How to unscrew the crankshaft pulley

Depending on the design of the crankshaft, the pulley is attached to it either with a nut or a bolt. On vehicles with rear wheel drive, basically, the pulley is fastened with a nut.
The engines of some rear-wheel drive vehicles can be started with a special handle, for which special protrusions are made to engage the handle. This handle is also called a "crooked key", and the engagement for this key is called a ratchet.

The pulley fastening nut is set to a 36 or 38 mm turnkey size. Use a socket wrench. The key is reinforced by welding a long handle or a tube is put on to increase the "shoulder".

How to unscrew the pulley nut:

1. Put the car on a pit or overpass.
2. Raise manual parking brake.
3. Turn on 4 speed at the checkpoint, put stops under the wheels.
4. Do not tap hard on the edges of the nut.
5. Throw on the socket wrench, lengthen it with a pipe and rip off the stuck nut.

If the pulley nut does not loosen:

1. Move the gear knob to neutral.
2. Remove the spark plug wires from the spark plugs so that the engine does not start.
3. Put a socket wrench on the nut and lengthen it with a pipe. Throw the wrench in such a way that the pipe rests against the ground or the machine side member on the right side to prevent the pulley from turning clockwise.
4. We make a couple of short sharp turns of the ignition key to turn on the starter. The starter will start to rotate the flywheel, the crankshaft flywheel, and the pulley is fixed with a key. In this case, the usually stuck nut quickly “departs”.

The crankshaft pulley of front-wheel drive vehicles is mainly bolted. To remove the crankshaft pulley of a front-wheel drive car, you must proceed in this order:

1. Jack up the front right side auto. Place a tragus, stump or a pair of wheels with disks.
2. Remove wheel.
3. Dismantle and remove the air filter with housing.
4. Remove protective cover.
5. Loosen the belt tensioner and remove the alternator belt.
6. To fix the crankshaft, it is necessary to remove the plug in the clutch housing, then insert a pry bar into the hole and rest it between the teeth of the flywheel.
7. Now you need to put on the socket wrench, lengthen it with a pipe and sharply try to turn it counterclockwise. The main one is to break the sticky pulley bolt.

If it is not possible to break the bolt from its place, then we use the method of unscrewing the starter. This method is shown above.

Useful advice from locksmiths who have seen a lot: use thinner or WD-40, or a similar rust preventative. After spraying on the thread (if the pulley is fastened with a nut), you have to wait 15 minutes, then try to unscrew it. If it is a bolt, then it is not easy to apply this agent to the thread, although it is sprayed around the bolt, it is possible that the liquid will pass through the micro-slits and decoke the connection.

Removing the pulley

Unscrewing the fastening bolt or nut is only half the battle. Next, you need to pull the pulley from the shaft. So the pulley will not simply be removed by hand, if its seat is not gouged. In addition, the pulley fits tightly on the shaft, then it is still fixed from turning with a key.

There are special pullers for removing the pulley from the shaft. There are mechanical and hydraulic pullers.

The design of the mechanical puller is simple. Usually it has three paws, with which it is necessary to hook the pulley itself, and rest the central rod against the shaft. After that, it is necessary to rotate the rod, the legs will straighten and pull the pulley towards themselves. There are even easier pullers that you can do yourself.
If there is no removable device for the pulley, then pry bars can be used. If one person removes, then in turn, pushing back a little on each side so that there is no skew. If there are two, then simultaneously from different sides with a sharp movement the pulley is pressed from the crankshaft.

It also happens that when using a puller, the walls of the pulley grooves do not withstand and break off. Therefore, when using pry bars, they should be hooked as close to the shaft as possible.

Installing the pulley on the crankshaft

In order to install the pulley back on the engine crankshaft, you need to check seats. If there are burrs, scuffs, remove them with an emery stone. If the old pulley easily fits on the shaft, then such a pulley is not suitable. It should sit tight, sit down with a certain effort. Before installing the pulley, to reduce friction, it is necessary to lubricate with oil or lithol.

Video

In this video helpful tips how to unscrew the nut securing the pulley to the crankshaft of an automobile motor.

Option for unscrewing the crankshaft pulley bolt with a V-ribbed belt.

How to remove the crankshaft pulley on the VAZ (2108, 2109, 21099, 2110, 2111, 2112, 2113, 2114, 2115).

How to remove the crankshaft pulley bolt. Bolted connection.

How to tighten the crankshaft pulley very quickly.

Removes the crankshaft pulley Honda car(Honda) without a special key.

Someday, every motorist who is used to doing everything with his own hands is faced with the need to dismantle the crankshaft pulley. Most often this is due to the replacement of sealing glands, which eventually age, crack and begin to leak oil. For an experienced minder, removing the crankshaft pulley is not particularly difficult, however, as Internet forums show, ordinary motorists who decide to save money often encounter great difficulties here.

This is what the crank pulley looks like

What prevents you from removing the crankshaft pulley?

In the vehicle owner's manual and repair manual, the procedure for dismantling the crankshaft, including the removal of the pulley, is described beautifully and succinctly, and it seems that it is easy to perform. But in reality, everything is not so simple. There are several reasons for this:

1. Inconvenient for work location of the pulley in engine compartment. It is hidden behind the generator and the approach to it is limited by the elements of the body structure. Pulleys are conventional and damper, which have an additional outer ring with a rubber seal to absorb vibration. To get to the pulley mounting elements, you need to loosen the tension bolts and remove the alternator and power steering belts. And even after that, when performing dismantling work, special care must be taken in the application of forces so as not to accidentally damage surrounding nearby parts and body paintwork.
2. When installed at the factory, the crankshaft pulley is clamped with a bolt or nut with a high compression force to ensure a secure fit. During engine operation, the right-hand mounting thread further strengthens the clamp. Heat and action environment over time, they exacerbate this process by coking the oil and corroding the metal. As a result, the fastening nut or bolt firmly adheres to the pulley body, and to disrupt this adhesion of metals without knowledge special ways not easy.
3. When the crankshaft rotates freely with any wrench. Therefore, before unscrewing the crankshaft pulley, the issue of reliable fixation of its position should be resolved in order to prevent turning when unscrewing the nut. In workshops, special devices are used for this, which are bolted to the pulley in technological holes and create a reliable stop against turning. In the absence of such devices this problem can be solved by installing reliable stops under the wheels and setting the 4th speed mechanical box gears. You can also fix the crankshaft flywheel by resting a mount against its teeth or holes.

How to unscrew the crankshaft pulley?

Pulley removal. Unscrew the nut

The pulley can be attached to the end of the crankshaft with a power bolt or nut. The nut is found on most rear-wheel drive cars. She may have special protrusions for engagement with the handle of the "crooked starter", the so-called "ratchet". To break the nut, the masters at the service station use a 36 or 38 socket wrench with a welded long handle and a locking device worn on the pulley. How to unscrew the crankshaft pulley , fixed with a nut, at home? To do this, you can do the following:

• put the car on a "pit" or overpass;
• engage 4th gear to prevent crankshaft turning when unscrewing the nut;
• lift the parking brake handle up to the stop to prevent the wheels from turning and the vehicle moving;
• tap the edges of the fastening nut with a wooden hammer;
• using a socket wrench to fit the nut and a handle extension in the form of a metal pipe, try to move the nut from the sticky position with a sharp counterclockwise movement.

Video: How to unscrew the nut on the wheel pulley and replace the oil seal

If successful, you can, by changing the position of the key head, gradually unscrew the nut to the end. If this attempt was unsuccessful, then the following method can be applied:

• put the gear knob in neutral position;
• remove the caps from the spark plugs to prevent sparking and starting the engine;
• put the head of the key on the nut and rest the end of the lever against the ground or the side member so that the pulley cannot turn to the right;
• by briefly switching on the ignition, give the crankshaft an impulse of rotation. Usually, one or two attempts to start will help the nut come out of place, and then it can be easily unscrewed with a wrench.

On most front-wheel drive vehicles, the pulley is bolted on. Before removing the crankshaft pulley , tightened with a bolt, perform the following operations:

• raise the right side of the car in front and install it on a trestle or stump, dismantle the wheel;
• remove block air filter, protective cover, loosen and remove drive belt generator, remove all parts that prevent free access to the pulley;
• to lock the crankshaft, you need to remove the plug in the clutch housing and insert a pry bar into the hole, resting it on the teeth of the flywheel;
• throwing a wrench head over the bolt, use the lever extension to apply several sharp forces in the direction of left rotation to break the bolt from its initial position. Most attempts succeed. If unsuccessful, you can try the method above for loosening the nut, with a short start of the starter.

The experience of the common people should also be borne in mind, which makes it possible to reduce the adhesion of the nut and bolt to the pulley. If you pre-lubricate the bolt or nut with vinegar essence, brake fluid or WD type grease, they come off easier. there is information about where it is located and how to check the crankshaft sensor.

How to remove the crankshaft pulley

After unscrewing the fastener, you need to remove the pulley. It sits tightly on the hub and is fixed with a key, so it will not be possible to simply pull it off the shaft by hand. It is best to use a special puller for this, which has two paws that capture the edges of the pulley and a central twisting screw stop resting against the shaft axis. In the absence of a puller, you can use mounts for this, with which you need to evenly pry the pulley from opposite sides, applying efforts in the direction from the shaft.

The point of application of force should be chosen as close as possible to the shaft. Before removing the crankshaft pulley, you can gently tap it with a wooden mallet to eliminate possible misalignment. Be especially careful not to deform the locking key and groove. The reverse installation of the pulley on the shaft should be carried out after treating the mounting points with grease, so as not to apply great efforts leading to distortion.

Almost every car enthusiast who likes to repair his car with his own hands has encountered the problem of removing the crankshaft pulley. At first glance, such a procedure seems not difficult, but at the first attempts to unscrew the bolt from the pulley, you suddenly encounter a number of problems. It immediately becomes completely incomprehensible how to stop and fix the crankshaft so that it does not spin. The second problem is how to get to the bolt that secures the pulley to the crankshaft.

During the removal process, due to strong tightening, there is a high probability of damaging the paintwork of the body and a large number of parts in the engine compartment of the car.

The whole problem is that the crankshaft pulley bolt (or possibly the nut, depending on which model) is very tightly twisted during installation. This is done so that it does not accidentally unwind. Since there is a possibility of serious damage to the car and expensive repairs. On top of that, when the motor is running, the bolt gradually tightens even more, and is also aggravated by coking, corrosion and sticking.

Some models of motors use a bolt to secure the pulley, while others use a nut. Consider these 2 options.

How to unscrew the crankshaft pulley nut?

crankshaft pulley

The nut at the end of the crankshaft is a feature of the motor of a classic rear-wheel drive car assembly. As a rule, these are cars of the Niva type, VAZ (models 2101-2107) and the like. Another such nut is called a "ratchet".

It is best to unscrew the nut with viewing hole. It is necessary to put the gearbox in 4th gear to fix the crankshaft, and apply the parking brake. D To work, you will need tools such as:

• lever extension, which has the form of a pipe segment,
• ring or socket wrench 36 or 38.

While in the pit, you need to try to unscrew the nut with a wrench with a long lever. But if it still doesn't work, then it is necessary to put the gearbox in neutral and do the following:

1. Remove candlesticks.
2. Remove alternator belt.
3. Being under the car, install the key and the extension so that the end rests on the side member or on the floor in the direction of rotation of the shaft.
4. Turn the key in the ignition lock, which will give a short pulse.

In most cases, the nut breaks off on the first or second attempt, and is then unscrewed with a regular wrench.

How to remove the crankshaft pulley bolt?

Most often, a bolt is present on motors in a front-wheel drive car, when the block is located perpendicular to the axis of the car. In this case, it will take more time to remove the bolt, as it is more difficult to get close to it. For work you will need:

• a set of automotive tools;
• socket head (it should be the size of a bolt with a lever and an extension cord);
• "tragus" (stump).

Do-it-yourself crankshaft pulley bolt removal

In order to properly remove the bolt, you need to do the following:

1. With the help of a jack, raise the right front part of the car and install it on the "tragus".
2. Remove wheel.
3. From the side of the hood, remove from above all the parts that would prevent access: the engine mudguard and the air filter.
4. Remove alternator belt.
5. In order to fix the crankshaft, open the plug on the clutch block and insert a pry bar into the hole formed. This is necessary to jam the flywheel teeth.
6. Under the wheel arch, put on the pulley bolt the head with the lever and the extension.
7. The bolt must be unscrewed counterclockwise.

Most often, the bolt can be removed. But if it does not unscrew, then you can try to add the length of the lever. If suddenly this does not help, then it is better to use the help of a starter. This must be done as described for removing the pulley nut in classic motors.

On the video: Tightening and loosening the crankshaft pulley bolt