To complete the work, you will need a car stand, a jack and wheel chocks.
1. We prepare the car for work and hang out the front wheels.
2. Remove the front wheel (see).
3. Holding the screw from turning with a TORX T40 wrench ....
Using a 13 mm socket wrench, unscrew the nut securing the stabilizer strut. 
The anti-roll bar nut is self-locking and cannot be reused, so it must be replaced during assembly.
4. Remove the washer and bottom cushion. 
5. Remove the screw. 
6. Remove the washer and top cushion. 
7. Remove the rubber bushing of the rack. 
8. We replace worn and damaged rack parts.
9. Install the stabilizer bar in reverse order. Tighten the rack mounting nut with a torque of 20 Nm.
10. Similarly, we replace the second strut of the anti-roll bar.
Anti Roll Cushion
To perform the work, an inspection ditch or overpass is required.
1. We install the car on a viewing ditch or overpass and prepare it for work.
2. We process the stabilizer bar mounts with a penetrating lubricant. 
3. Using a 10 mm wrench, unscrew the nut securing the stabilizer bracket. 
Renault Logan can be called a special car, but the systems in it are no different from other cars. This also applies to the anti-roll bar. The bushing does not fail so often, but if this happens, then the replacement is quite simple and even without outside help. Some motorists calculated the time of work - it turned out no more than 40 minutes. But before carrying out repairs, it is worth understanding what a stabilizer bar is.
Device principle
The anti-roll bar is a suspension component of the machine. It connects opposite wheels by means of a thrust element. The connection is torsion. The anti-roll bar is an integral part of passenger cars with independent suspension, including Renault Logan. It is installed on both the rear and front axles.
The element is a large U-shaped bar. It is made exclusively from spring steel. In Renault Logan, the stabilizer is located across and is fixed with clamps and rubber bushings. Due to the latter, the anti-roll bar rotates. It is attached to the suspension itself either by a shock absorber strut (used in a McPherson-type suspension) or by levers (in the common people - a multi-link).
The bushing can fray or even burst, and then the driver will feel a deterioration in the operation of the entire suspension - the car will noticeably shake on every bump, and the body will constantly roll. It is not difficult to solve the problem - the parts have several regular sizes, among which it is easy to choose the right one for your car. You can also buy a replacement from an authorized Renault dealer, but we recommend taking something stronger. An excellent, but more expensive option would be polyurethane.
Replacement instructions
We got acquainted with the device and the principle, now let's move on to the practical part. To replace, it is not necessary to completely disassemble the chassis. Lay a warm bedding, after placing the necessary tool next to it: keys of different sizes, coupler heads and, of course, a new part, or better, two at once. It is recommended to change in pairs so that wear occurs evenly.
The first step is to remove the protective part of the stabilizer. Although this plastic cannot be called protection, we recommend installing a normal sheet of metal instead. The protection is fixed with ordinary bolts.
Now you need to unscrew the earrings. The easiest way to do this is with a standard ratchet. After unscrewing the earrings, the anti-roll bar goes down - now you can easily remove the old ones from it and replace it.
After replacing, raise the stabilizer with your hand up, insert the bushings tightly into the sockets, and then fix them with earrings. And the last - put the protection in place.
Stabilizer links are parts of a car's suspension. They are responsible for minimizing roll when the car enters a turn. In all cars, the principle of operation of the part is the same, the same applies to Renault Logan. Thanks to the stabilizer struts of the Renault Logan, the suspension and the car body are connected into one. If there were no stabilizers in the device of the car, then when entering the turn, too much roll would form, and the car would roll over. When braking, the car would dive with its hood into the ground, and with a sharp start, it would rear up.
The stabilizer struts have a significant load, especially if the driver does not drive very carefully. The consequence of such operation of Renault Logan is the repair of stabilizer struts with your own hands or at a service station. Many people prefer to do this type of repair on their own, as it is cheaper and not difficult.
How it works and where is the anti-roll bar Renault Logan
The principle of operation of the anti-roll bar is focused on the repayment of translational waves that occur in various parts of the car on rough roads when driving on them. Renault Logan stabilizer struts connect opposite wheels by means of a thrust element. The connection acts on twisting.
A stabilizer bar is installed on both the front and rear axles. This part is a large U-shaped rod, and it is made of spring steel. In Renault Logan, the stabilizer is located across and is fixed with clamps and rubber bushings. Due to the rubber bushings, the anti-roll bar is able to rotate. It is attached to the suspension with levers or a shock absorber strut.
Did you know? After replacing the stabilizer struts, there is no need to adjust the wheel alignment. Racks do not affect the angle of their inclination.
Reasons for replacing the stabilizer bar
Under operating conditions on bad roads, the load on the suspension is significant, and the racks become a consumable part. Their service life is in the range of 15-20 thousand kilometers. During operation, the sleeve may fray, burst. If this happens, the owner will feel it from the behavior of the car - it will noticeably shake on bumps, and the body will roll. When hitting speed bumps and other bumps, the car may make a knocking sound. Also among the symptoms that portend the need to replace the stabilizer struts - when driving, you need to catch a rut, constantly taxi.
To get rid of all the unpleasant consequences of the failure of the stabilizer strut, it must be repaired or a new one installed. Replacing the Renault Logan stabilizer struts does not involve any complicated steps. This work can be done independently, the whole procedure takes less than an hour.
Important! Failed stabilizer elements lead to breakage of other suspension parts. To avoid the need for more costly repairs, the vehicle should be periodically inspected for problems with the stabilizer bar.
How to replace the stabilizer bar Renault Logan
If the stabilizer link is pulled in the transverse direction and a knock is heard, this indicates a malfunction. You can solve this problem by replacing the rack. But, some owners are thinking about how to repair the stabilizer struts with their own hands. Thus, they try to reduce the cost of fixing the problem. But, in some cases, it is still more reliable to make a replacement.
Did you know? Repairing the stabilizer mounts will significantly reduce costs. It is not difficult to perform it, but there are some features. It is easier to restore the racks with bushings. With ball joints, the racks are restored for a short period.
To replace the rack, you need tools such as a hammer, screwdriver, adjustable wrench, jack, TORX.
The process of replacing the stabilizer strut Renault Logan:
- Loosen the nuts on the front wheel;
- Using a jack, raise the front of the body, or, if there is a lift, hang the car;
- The nuts are removed from the wheel, after which the wheel itself is removed;
- The stabilizer bar and the place of its attachment are cleaned of dirt;
- Item treated with WD-40;
- On the rack fixing bolt, loosen the nut with TORX and at the same time tighten the flat head of the bolt with an adjustable wrench;
- Remove the nut and cushion. If the pillow is oxidized and significant efforts are required to remove it, the bolt can be carefully knocked out with a hammer;
- When the pillow is removed, the bolt itself can be knocked out with a hammer. Use a screwdriver to knock out the bolt that has entered the rack housing out of the housing;
- After removing the bolt, bend the stabilizer and remove the rack housing;
- Clean the mounting holes on the suspension arm and stabilizer from dirt;
- The new strut is installed between the suspension arm and the stabilizer;
- You need to put on the top pillow on the bolt and insert it into the rack body;
- A pillow and a fixing nut are installed from below;
- Reassemble in reverse order.
Replacing the bushings of the stabilizer bar
Knocking on bumps in a Renault Logan car is present due to worn stabilizer bushings. This is the reason for the appearance of transverse and longitudinal play. Therefore, it is required to replace the Renault Logan anti-roll bar bushing.
Important! If a rubber squeak is heard on uneven sections of the road, it is necessary to check the stabilizer bushings. If you hear thuds, you need to check the racks.
Why change bushings
When worn, the bushings cause noise. In general, this detail is very important, without bushings, the metal is likely to break during the movement of the machine due to overload. Thanks to the bushings, the floating rotation of the stabilizer is ensured.
You should not wait until the bushings become completely unusable, it is recommended to change them every 1000 km.
How to make a replacement
To replace the rubber bands on the Renault Logan stabilizer, you will need a 10 mm wrench and an 18 mm ratchet.
On the left side of the car:
The first step is to process the WD-40 mounting studs. This will make loosening nuts and bolts easier. After removing them, you need to remove the bushing bracket and replace it with a new one.
On the right side of the car:
Remove the silencer rubber, partially unscrew the protection of the fuel and brake pipes. This will provide more room to unscrew the stabilizer bushing bracket stud. After all, we replace the sleeve and assemble everything in the reverse order.
Anti-roll bar Renault Logan - a special design that has a U-shape and operates in two modes - twisting and stretching. What are the features of such a detail? What functions does it perform? In what cases is it necessary to replace the anti-roll bar? Consider these and other questions below.
Purpose and design features of SPU Renault Logan
When driving along a curve or when entering a turn, a group of centrifugal forces acts on the car body. The emerging loads are evenly distributed between the various elements of the car. In this case, part of the load is removed from the internal and transferred to the external wheels. As a result, a transverse roll appears, which leads to body swaying, impairs handling and reduces the stability of the vehicle.
During the production process, developers do their best to eliminate the processes described above. If this work is not done, the controllability of the machine deteriorates, and the tendency to overturn increases. The amount of roll and its level largely depend on the suspension travel. The larger it is, the higher the roll. To eliminate the mentioned problems, the following methods are applied:
- Installation of an additional node that would play the role of an elastic element. In many cars (including Renault Logan), this function is performed by an anti-roll bar.
- Installing shock absorbers with a small stroke and limiting the movement of the levers. This option is usually used on sports cars.
The Renault anti-roll bar performs the following tasks:
- Alignment of the car body during sharp maneuvers on the road.
- Reducing the level of roll that occurs when cornering.
- Redistributing the load between the wheels.
- Improving the quality of the grip of the car with the road.
Structurally, the stabilizer has the form of a metal rod having a circular cross section. Bushings and mounting clamps are used to fix the device to the body. The task of the bushings in the Renault anti-roll bar is to prevent the device from scrolling while the car is moving.
It is combined with the stabilizer suspension elements using shock absorber struts and special levers. The switching itself is carried out using stabilizer racks.
How does the device work?
The principle of operation of the Renault anti-roll bar is as follows:
- In the presence of angular vibrations, as well as when tilted to the left or right side, the stabilizer rods also move. As a result, the stability of the car is ensured. At this stage, bushings are no less important, which allow the device to twist in the middle.
- Renault's stabilizer resistance increases immediately after the bank rises. As a result, the body is leveled, additional stability is added. At the same time, the traction bars guarantee optimal tire grip on the track during sharp turns.
How the SPU functions can be clearly seen in the video below.
The transverse stabilizer performs its tasks the better, it has a more rigid design. This indicator depends on a number of key factors:
- Traction locking geometries.
- Knot shapes regarding the bottom of the car (bottom).
- The type of characteristics used in the production process, as well as its quality.
The installation of high-quality SPU on Renault guarantees cornering stability even when driving at high speed. At the same time, the driver practically does not feel the inclination of the body part to one side or the other. By adjusting the rigidity of the SPU, it is possible to correct the stability and controllability of the vehicle.
Advantages and disadvantages
The Renault Logan transverse stabilizer has its advantages and disadvantages. The pluses include:
- Manageability improvement.
- Reduce roll during sharp turns.
- Reliability and long service life.
On the other hand, the stabilizer has a number of disadvantages. In particular, it reduces the travel of the independent suspension and “steals” a number of other useful qualities from it. For this reason, the device is installed on passenger cars, and is rarely mounted on SUVs. In such cars, a special stabilizer is used or they are not used at all.
How to replace the anti-roll bar Renault Logan?
Repair or replacement of SPU on Logan is carried out in a situation where obvious deformation was noticeable during the inspection process. In addition, the device is subject to repair (replacement) if the elasticity of the sleeve deteriorates. In the latter case, the element needs to be replaced.
Damage can be recognized by the following signs:
- The car starts to pull to the left or right.
- There are suspicious knocks in the front suspension.
- Inspection showed the presence of deformation of the product.
The device is replaced according to the following algorithm:
How to make a replacement, you can watch the video:
How to change stabilizer bushings on Renault Logan?
The SPU sleeve plays a key role in ensuring the operability of the assembly as a whole. The appearance of a thud often indicates the destruction of the gum and the need to replace it.
“It is not worth tightening with the installation of a new bushing, because if this assembly is destroyed, the comfort of the trip decreases and the stability of the car decreases”
If the sleeve is serviceable, then longitudinal or transverse backlashes are excluded. In addition, the bar itself must be securely fixed by devices and not scroll in its axis.
To change the bushings yourself, proceed as follows:
- Prepare the key for "ten" and the head for "eighteen".
- On the left, clean the mounting studs and treat them with WD-40. This facilitates the process of twisting the nuts.
- Unscrew the nut to "ten", and then - the bolt to "eighteen".
- Dismantle the bushing bracket and change the device.
- On the right, dismantle the rubber bands from the muffler, the protection of the fuel and brake system pipes (if required).
- Twist the stabilizer bushing stud and change the device.
How to change the bushings, you can watch the video:
Timely Renault repair and replacement of faulty elements reduces the risk of deterioration in vehicle handling and stability. The main thing is to diagnose the problem in a timely manner and act competently in the process of troubleshooting. If there are difficulties, you can always watch the training video and do the work.
Many domestic motorists prefer the French auto industry in the face of many models, including the Renault Logan. Responsible drivers try to take proper care of their vehicles by carrying out maintenance in a timely manner. Not the last place here is occupied by the suspension of the car and the anti-roll bar ("Renault Logan" (SPU), in particular, we will consider in the article).
Carrying out diagnostics of the chassis is not as difficult as it might seem at first glance. Special and expensive equipment is not required here, minimal skills and knowledge are enough.
But what is this SPU? As practice shows, not all drivers even understand what kind of detail this is. These gaps in knowledge will need to be filled.
Nice problem for car owners
There are significant benefits to owning your own car. Modern life accelerates the pace, and it becomes problematic to be in time everywhere and everywhere. For this reason, many people buy cars, which are becoming more and more. In this regard, transport has already ceased to be only a luxury item, now for many people it is the first necessity.
However, everything pleasant has a downside. To keep your car in working condition, you need to have a decent budget for the purchase of the same anti-roll bar, Renault Logan, for example, and strong nerves.
But the hitch is still not financial, there are technical issues. Any car, especially modern models, is complex, and it is still difficult for an inexperienced driver to understand what's what. But over time, being interested in many details, you can gain invaluable experience. This will allow you to fix many malfunctions on your own, without the help of specialists.
What is SUP?
Essentially, an anti-roll bar is a connecting piece that links opposite wheels. And since it experiences significant loads, it must be sufficiently elastic. For this reason, such parts are currently made of the torsion type.
The design of the anti-roll bar is made in the form of a U-shaped round cross-section rod. Often this element is made of spring steel, which, due to its physical properties, is best suited. Depending on the brand of the car, the stabilizer can take any other necessary shape.
The part is attached to the body by means of rubber bushings and clamps. Due to this, the rod can rotate, which is associated with the features of its operation. SPU can be placed in front or behind the car.
Need?
Now we need to touch on the question of what is the need for SPU. The thing is that when the car enters the turn, the body rolls in the opposite direction. And the value of such an angle is directly dependent on the centrifugal force and the suspension device.
If there were no rear or front anti-roll bar ("Renault Logan" also has it), the number of accidents would increase. As statistics show, most of the accidents on the roads are associated with overturning vehicles. In other words, drivers enter a fairly sharp turn at speed, and exit it already lying on their side. Is this situation familiar? True, now it does not occur so often, since the whole thing is just in the SPU.
Consider the case of an independent suspension of a car. When he makes a turn at speed, the wheels on one side are loaded more than on the other, which, on the contrary, are unloaded and tend to break away from the road. This is where the whole benefit of the SPU comes into play. It evenly distributes the load between opposite wheels. That is, the torsion bar is untwisted, while one part of it rises, and the other falls. This reduces the roll angle and keeps the vehicle level.
For your information, the Renault Logan anti-roll bar successfully resists loads only in the transverse direction. He is not able to cope with vertical (entry of both wheels into the pit) and angular vibrations.
Disadvantages of the stabilizer
With all the significant benefits of SPU, it has a number of disadvantages:
- The presence of this element in the design of the chassis of the car negates the properties of an independent suspension.
- Installing a stabilizer on an SUV will adversely affect its cross-country ability. There may be a risk of hanging the wheel on bumps.
- If an excessively rigid connection with the wheels is established at the rear of the car, this will also have a bad effect on steering.
It is possible to eliminate the listed shortcomings, only this is due to the complexity of the design. For example, in a number of SUVs, the stabilizers are turned off if necessary.
There is also a radical method - adaptive suspension, which does fine without any anti-roll bar. "Renault Logan" is not threatened. Unfortunately, this is only true for business class models.
Nuance
Not every Renault Logan has a front or rear stabilizer. Due to the continuous beam that is available in the rear suspension, the bar is installed without racks. Vertical oscillations are insignificant here, and a horizontal bar, which is fixed on the axis, saves from transverse loads.
Sometimes there may be no stabilizer in front of the car. In many ways, the presence of this element is an additional option. And according to the assurances of the manufacturers, this will in no way affect the safety of driving.
However, many drivers do not want to operate the Renault Logan without an anti-roll bar and install it on their own. Only here it is worth considering that if the car is still under warranty, then in the course of any independent intervention in the design of the vehicle, it is automatically canceled.
According to most experts, the presence of SPU in the suspension of a car is desirable for frequent trips outside the city. In the case when transport is operated mainly in urban areas, then there is not much difference in whether there is a torsion bar or not.
SPU diagnostics
The stabilizer is difficult to diagnose, and therefore it is very difficult to determine whether the entire element needs to be replaced, or only its bushings or other parts. If there is any malfunction, then the knock emitted can be confused with the sound of the ball joint of the lever that has become unusable. Some other signs may indicate problems with the steering rack.
Before you think about installing an anti-roll bar on the Renault Logan, you should carefully inspect the suspension for play. For this, a mount is useful, which you need to squeeze the rack. If it was possible to do this, the SPU must be replaced.
However, this method of diagnosing does not always give a result. Then it remains to remove the stabilizer and calmly inspect each hinge. If it is worn, then it is easy to move it by hand.
The failure of the SPU bushings is a frequent and unpleasant phenomenon. Often these elements are frayed or completely burst. This is expressed in shaking the car when driving over any bumps. In addition, the body constantly heels, which is not good.
Do not ignore the signs of obvious malfunctions of the STC or its parts, since this can result in not only unreasonably high costs. It may be necessary to repair the entire suspension over time.
Preparation for work
If a torsion bar malfunction has been identified, it makes no sense to contact the nearest service station. You can do all the work yourself, you just have to prepare everything you need. For your information, the article for the Renault Logan anti-roll bar is 6001547137. Among the tools you will need:
- open-end wrenches for 10 and 13;
- wrench T40 (Torx);
- head 18;
- jack;
- stand.
After everything is prepared, you can go directly to the procedure.
Work on the replacement of SPU
The work can be done all alone, but it is much better to enlist the support of acquaintances or friends. Then everything will go smoothly and you definitely won’t be bored.
The whole procedure can be divided into several stages:
- First you need to raise the front of the car, and install stands for insurance from the bottom of the subframe. Without this, you can not do without, if necessary, remove the entire bar, and not just its racks.
- Remove the protection, treat all threaded connections with a special tool WD-40 (liquid key).
- Next, you need to unscrew the nut from the bolt on which the SPU rack is held, and the fastener itself is knocked out using a spacer and a hammer.
- After that, you can proceed to unscrewing the bolts that fix the rack itself.
- Before removing the racks, you need to throw off the brake hose from the bracket so as not to damage it.
- Then you can remove the bushings that hold the racks. They also need to be replaced.
- At this stage, replacing the anti-roll bar with Renault Logan, you can proceed to the direct dismantling of the SPU. Here you need to hold the nut with a Torx key. After unscrewing it, the sleeve is removed.
- At the next stage, you need to unscrew the fasteners that hold the SPU on the subframe (there are two of them).
- Now you can unscrew the nuts securing the brackets. After that, it remains to pry the pillows with a screwdriver and take them to the side. They also need to be replaced.
Assembly is carried out in the reverse order. It is recommended to change all bushings and silent blocks in any case, even if they are not damaged.
Outcome
As you can see from the stabilizer replacement instructions above, the whole job is really simple. It is enough to follow the sequence of actions. This once again suggests that the Renault Logan car has a simple device, at least its suspension.
But if there is no time to mess with the anti-roll bar on the Renault Logan due to heavy workload, you can entrust this matter to the auto repair shop specialists. They will do all the work quickly and professionally. The cost of work is usually 500 rubles. Here everyone decides for himself whether to pay for a qualified service or to enrich himself with experience. In any case, car owners will not lose.
