Crossover operation Nissan Qashqai on domestic roads inevitably leads to wear and tear on the suspension, which is especially sensitive to bumps and potholes. One of the most common problems that owners face is the failure of rubber-to-metal hinges, otherwise called silent blocks. These elements play a critical role in dampening vibrations and providing precise vehicle handling by linking the suspension arms to the body.
Ignoring signs of wear, such as clunking noises when driving over bumps or uneven tire wear, can lead to more serious consequences. In the worst case, a destroyed element can deform the lever itself or disrupt the geometry of the suspension, which will make the operation of the machine unsafe. Understanding how to properly conduct replacing front control arm silent blocks, will save you significant money compared to visiting a specialized service.
Diagnosis of faults and selection of spare parts
Before you start disassembling the suspension, you need to be sure of the cause of the extraneous noise. Symptoms of wear on silent blocks Nissan Qashqai often disguised as problems with stabilizer struts or shock absorbers. The characteristic sound is a dull knock or grinding sound that occurs when driving through speed bumps or potholes at low speed. Also a sign of a malfunction is a beating of the steering wheel at high speeds or a “floating” motion path.
Visual inspection often gives a clear answer. You need to look under the car and inspect the rubber part of the hinge. If you see deep cracks, tears or complete absence of rubber, then replacement is inevitable. Sometimes the rubber simply crumbles and the metal bushing hangs loose inside the lever body. You should not delay repairs, as the load is redistributed to other suspension components.
The choice of spare parts is a key point on which the durability of the repair depends. Original parts from Nissan are usually expensive, but guarantee exact compliance with the manufacturer's specifications. However, there are many high-quality analogues on the market from brands such as Febi Bilstein, SWAG or Corteco. It is important to note that some manufacturers offer pre-assembled levers, which simplifies the work but increases the cost.
If you decide to change only the bushings and not the entire lever, make sure you have the necessary tools to press them out. In the case of Nissan Qashqai the design of the levers requires the use of specific press machines or powerful hydraulic jacks with a set of adapters. An attempt to knock out the silent block with a hammer often leads to damage to the lever itself or the seat.
Necessary tools and workplace preparation
To carry out quality work, you will need not only a set of keys, but also specific equipment. A standard automotive tool set includes 17, 19 and 21 millimeter sockets, as well as heavy-duty wrenches and ratchets. However, the main difficulty lies in removing the lever and squeezing out the old silent blocks. Without the appropriate press, this task can drag on for several days.
You will need a hydraulic jack, stands for the car (goats), a puller for ball joints and a set of mandrels for pressing out silent blocks. The mandrels must be selected for the specific diameter of the bushings and lever body. The use of universal pullers often leads to distortion of the rubber and the impossibility of its further installation. Also, don't forget to use a penetrating lubricant like WD-40 to treat soured bolts.
Prepare a clean and level work area. It is advisable to use an inspection hole or a lift, since access to the lower part of the suspension must be free. If you are working in a garage with a pit, make sure it is deep enough to support the car on stands. Safety is the number one priority, as the suspension weighs a lot and the springs are under high pressure.
⚠️ Attention: Never attempt to remove arms using only a hydraulic jack. Be sure to use reliable safety stands under the car body. Falling the machine even from a small height can lead to serious injury and destruction of the suspension.
Pay special attention to the condition of the fastening bolts. If they have signs of corrosion or the edges are torn off, stock up on new fasteners in advance. IN Nissan Qashqai bolts with special threads and often with special washers are used to ensure the correct tension. Reusing old bolts is not recommended, as they may have stretched during use.
- Change only bushings
- Change the lever assembly
- I'll go to the service station
- I don't know yet
Step-by-step instructions for dismantling the lever
Start by securing the car. Raise the front of the car with a jack and place it on stands. Remove the front wheel to gain access to the suspension components. Loosen the ball joint bolt and the stabilizer bar bolt. Do not unscrew them completely until the lever is free of load.
Next, you need to remove the lever from the body brackets. To do this, unscrew the bolts securing the silent blocks to the body. A problem that often arises here is that the bolts may be over-tightened. Use a wrench extension and, if necessary, a penetrating lubricant. If the bolt does not budge, try gently heating it with a torch, but be careful not to damage the rubber elements that have not yet been removed.
After all the fasteners are removed, the arm will still be held in place by the ball joint and springs. You need to disconnect the arm from the steering knuckle. To do this, unscrew the ball joint nut and use a puller to press out the pin. If you don’t have a puller, you can gently hit the protrusion of the steering knuckle with a hammer, but under no circumstances hit the ball joint pin itself.
Remove the lever and place it on the workbench. Now you can start pressing out the old silent blocks. Use a hydraulic press or a powerful clamp with appropriate mandrels. Press the bushing strictly in the center so as not to damage the seat in the aluminum lever body. If the lever has signs of corrosion or cracks, it is better to replace it entirely.
⚠️ Attention: When pressing out the silent block, be careful not to damage the aluminum lever housing. Deep scratches or deformation of the seat will lead to the fact that the new hinge will not hold tightly, and the repair will be useless.
☑️ Preparation for dismantling the lever
Installation of new silent blocks and assembly
Installing new silent blocks requires special care. The rubber of the new joint must be clean and free of grease. To facilitate installation, you can use a special silicone-based lubricant or soap solution, but under no circumstances use oils or gasoline, as they destroy the rubber. Press the bushing into the lever using a press, controlling the seating depth.
It is important to ensure the correct orientation of the silent block during installation. On some models Nissan Qashqai the rubber part has a certain shape or marks indicating the direction of movement. Improper installation can cause the rubber to curl under load and quickly break down. If you are unsure, check the diagram in the technical documentation.
After installing all the silent blocks, proceed to install the lever on the car. Tighten the bolts to the body only after the vehicle is lowered onto its wheels. This is critical because the rubber bushings must operate in the neutral position. If you tighten them in a suspended state, the rubber will be constantly twisted, which will lead to its rapid failure.
Assemble the remaining components: install the ball joint, tighten the stabilizer bolts. Check the tightness of all connections. Use a torque wrench to ensure exact tightening torques specified by the manufacturer. For lever bolts Nissan Qashqai the torque is usually from 100 to 140 Nm, but it is better to check this data in the repair manual for your specific modification.
What to do with the stabilizer bolts?
Stabilizer bolts often have a special cone and washer. If you have lost or damaged them, it is better to replace them with new original ones. Using regular nuts may result in looseness and knocking.
Wheel alignment and checking results
After replacing the silent blocks of the front levers with Nissan Qashqai It is imperative to undergo a wheel alignment procedure. Any intervention in the suspension geometry changes the wheel alignment angles. Even if it seems to you that the car is driving straight, the inside corners can be disrupted, which will lead to the tire tread being “eaten” over several thousand kilometers.
At the service station, inform the technician that the silent blocks have been replaced. This will help him calibrate the equipment correctly. The camber and toe angles must be set strictly according to factory parameters. Also ask to check the condition of other suspension elements, since if the silent blocks are worn out, the load on them could be increased.
After installing the wheels and lowering the vehicle, test drive. Listen to any extraneous sounds. The steering wheel should be level, and the car should not pull to the side when driving in a straight line. If you feel vibration in your steering wheel, you may need to have your wheels balanced or have your rims checked.
In the first days of operation after repair, pay special attention to the operation of the suspension. Rubber elements take time to adapt to new loads. If after a week you notice new knocking or uneven tire wear, return to the service station to re-check the tightness of the bolts and wheel alignment.
When purchasing new silent blocks, pay attention to the production date. Rubber hardens over time even without use, so choose spare parts that were produced no more than a year ago.
Comparison of repair methods and savings
There are two main approaches to suspension repair: replacing only the silent blocks or replacing the entire lever assembly. Replacing the lever assembly takes less time and does not require complex pressing equipment. However, the cost of such a solution is much higher, since you are paying for the entire assembly, including the metal, which may be in excellent condition.
Replacing individual silent blocks is more labor-intensive, but cost-effective. You only pay for rubber bushings, which is several times cheaper. This option is ideal if the lever itself is free of corrosion and deformation. For experienced craftsmen or those who have access to a press, this is the best choice.
Let's look at a comparison table of costs and effort for both methods:
| Criterion | Replacing silent blocks | Replacing the lever assembly |
|---|---|---|
| Cost of spare parts | Low (bushings only) | High (whole node) |
| Labor intensity | High (needs abs) | Low (quick installation) |
| The need for special tool | Yes (press, mandrels) | No (regular set) |
| Lever condition | Requires verification | New node guarantee |
| Opening hours | 3-5 hours | 1-2 hours |
Replacing only silent blocks is beneficial if you have a tool and a working lever, while replacing the assembly saves time and guarantees the integrity of the assembly.
Typical repair mistakes
One of the most common mistakes is not properly tightening the bolts before lowering the vehicle to the ground. As mentioned earlier, this leads to distortion of the rubber and its rapid destruction. Some craftsmen tighten the bolts “by weight” so as not to have to worry about turning the lever, but this is a gross mistake and unacceptable in suspension repairs.
Another mistake is using the wrong lubricants. Many people use litol or solid oil to install silent blocks. These lubricants contain aggressive additives that destroy rubber in a short time. Use only special silicone lubricants or soapy water that do not harm the elastomers.
Sometimes when replacing, they do not pay attention to the condition of the ball joint. If the silent blocks are worn out, it means that the suspension was not working properly, and the ball joint could also be worn out. Skimping on checking the ball joint can lead to it breaking off along the way, which can lead to an accident.
⚠️ Attention: Do not ignore the condition of the mounting bolts. The use of old, stretched bolts with stripped threads is unacceptable. This can lead to the lever being torn away from the body while driving, which will create an extremely dangerous situation on the road.
Why does it knock after replacement?
If after replacing the silent blocks there is still a knock, check not only the new parts, but also the stabilizer struts, as well as the stabilizer bushings. Often the knocking comes from them, and not from the levers.
FAQ: Frequently asked questions
How often do you need to change silent blocks on a Nissan Qashqai?
The service life of silent blocks depends on operating conditions, but on average they last from 80,000 to 120,000 kilometers. When driving on bad roads, the service life may be halved. Regular suspension diagnostics will help detect wear at an early stage.
Is it possible to drive with worn silent blocks?
Short term - yes, but it is dangerous. Worn silent blocks disrupt the suspension geometry, increase the braking distance and can lead to the destruction of other elements. If there is severe wear, there is a risk of the lever being torn from the body.
Do I need to change silent blocks in pairs?
It is recommended to change them in pairs on the same axis. If one is worn out, the other is most likely in a similar condition. This will ensure uniform behavior of the suspension and prevent distortions of the car.
How long does it take to replace silent blocks?
If you have the necessary equipment and experience, replacing two silent blocks on one lever takes about 1-1.5 hours. Without a press and with the need for manual pressing, the process can take 3-4 hours per lever.
Is it possible to replace silent blocks without removing the lever?
Theoretically possible, but extremely inconvenient and risky. There is practically no space for working with a press or puller inside the car arch. Removing the lever is the most correct and safe way to do the work.