The steering rack is one of the critical components in the vehicle control system, ensuring the transmission of force from the steering wheel to the wheels. For owners Nissan Almera N16 The design is characterized by a certain specificity, where backlash, knocking and leaks of working fluid may occur over time. Many car owners are faced with the need to repair this unit, but are not always prepared for the costs of specialized services.
Troubleshooting yourself requires careful preparation, the availability of specialized tools and a deep understanding of the mechanism. In this article, we will analyze in detail the process of dismantling, diagnosing and restoring the functionality of the unit, so that you can return the car to clear control without extra costs.
Preparation of tools and work area
Before starting work, it is necessary to organize a convenient place for repairs. It is best to use an inspection hole or trestle, as access to the lower parts of the suspension and rail mounts will be limited. You will need a standard set of keys and sockets, including sizes 12, 14, 17, as well as special pullers for removing steering tips.
Pay special attention to preparing the fluid for flushing and lubrication. You will need quality hydraulic fluid (ATF or special power steering fluid is often used), as well as a set of repair kits, including oil seals, bushings and retaining rings. Don't forget about sealant and lubricant for spline joints.
- 🛠️ Set of sockets and sockets
- 🔧 Puller for tie rod ends (bird or screw type)
- 💧 Container for draining old liquid and rags
- 🧴 Penetrating lubricant (for example, WD-40 or equivalent) for loosening stuck bolts
⚠️ Attention: Before starting work, be sure to turn off the power to the car by removing the terminal from the battery to prevent accidental short-circuiting or turning on the system when working with sensor wiring.
Removing the steering mechanism from the car
The removal process begins with disconnecting the steering ends from the steering knuckles. To do this, you need to remove the protective caps, unscrew the fastening nuts and use a puller to press out the tip pin. Be careful not to damage the rubber boots and threads on the rods.
Next, you need to unscrew the bolts securing the steering rack to the subframe. Usually there are four of them, located in pairs on both sides. After unscrewing the bolts, the rail may sit tightly in the seats due to corrosion or residual tension, so careful prying with a pry bar may be required.
It is also important to disconnect the high and low pressure hoses from the hydraulic booster, plugging them immediately after dismantling to avoid dirt getting into the system. The steering shaft (cardan) is disconnected from the rack gear, for which you need to unscrew the clamp bolt and carefully disconnect the spline connection.
- 🚗 Remove the crankcase protection and fender liners for better access
- 🔩 Unscrew the nuts of the steering tips and press out the fingers
- 🔧 Loosen and remove the bolts securing the rack housing to the subframe
- 🛢️ Drain the fluid from the system and disconnect the power steering hoses
☑️ Preparation for dismantling
Pulling the rack out of the engine compartment requires some skill, since the unit has significant weight and dimensions. Exit it through the lower hole, taking care not to damage the surrounding suspension and brake system components.
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Diagnostics and disassembly of the unit
After removing the rack, it is necessary to conduct a thorough visual inspection of the housing for cracks, corrosion and traces of leaks. Pay special attention to the condition of the tie rod boots: if they are torn, moisture and abrasive dust have probably gotten inside the mechanism, which has led to accelerated wear.
Disassembly begins with removing the protective covers and retaining rings from the ends of the housing. Unscrew the rack stop adjusting bolt, which is responsible for tensioning the gear train. Next, carefully remove the rack from the housing, holding it so as not to damage the teeth.
The key is to check the condition o-rings and bearings gears. Often it is the wear of the steering shaft bearing that causes runout and play when the steering wheel rotates. Also check the condition of the bushing on which the rack itself slides - wear here is a common cause of knocking.
Common causes of knocking in rack N16
The main cause of knocking is often wear in the aluminum bushing located under the support bearing. Also, knocking can occur due to loosening of the adjusting bolt or wear of the rod seals when the liquid washes out the lubricant from the rubbing surfaces.
All removed parts must be thoroughly washed in kerosene or a special solvent, removing old grease and wear products. Inspect the toothed surface of the rack for burrs and chips - if there are serious defects, repair may be impractical and the unit will need to be replaced.
Replacing seals and restoring tightness
Replacing oil seals is the main task during a rebuild, as they prevent fluid leakage and dirt from entering. Remove the old seals using a thin screwdriver or a special puller, being extremely careful not to scratch the housing mounting surfaces.
Before installing new seals, be sure to lubricate them with operating oil and install them in place using a mandrel of the correct diameter to ensure an even fit. Do not allow distortions, as this will lead to rapid failure of the seal and repeated leakage.
Pay special attention to the gear oil seal, which is located on the steering shaft side. Replacing it requires care, since the seat often has a complex shape and is subject to wear. If the seat has wear, it may require restoration or installation of an oversized repair seal.
- 🧼 Thoroughly clean all seats of old grease
- 🛢️ Use only high-quality oil seals from the repair kit
- 🔨 Carefully press in the new seals without distortion
- 💧 Apply a thin layer of sealant to the joints of the lids (if provided for by the design)
⚠️ Attention: Never use universal oil seals from other car brands without carefully checking their dimensions and elasticity of the material - this can lead to instant failure of the unit.
Before installing new seals, lightly heat them with a hairdryer or dip them in hot oil - this will increase the elasticity of the rubber and simplify installation, reducing the risk of damage to the edge during installation.
Eliminating play and adjusting gaps
After assembling the housing and installing new oil seals, it is necessary to correctly adjust the gap between the rack and pinion. This is done using an adjusting bolt, which rests against the rack through a special spring and bearing.
Tighten the bolt gradually, checking the rack movement by hand. The rack should move smoothly, without jamming or dips, but there should be no noticeable play. Tightening too tightly will cause rapid wear of the teeth and make the steering wheel difficult to rotate.
The adjusting bolt is secured with a lock nut and a locking pin. After tightening, be sure to check the secure fit, as vibration can weaken the connection over time and cause knocking. Install protective caps on the ends of the rail.
Proper adjustment of the gap is a balance between the absence of play and ease of rotation of the steering wheel; overtightening is dangerous due to the destruction of the gear pair.
In some cases, eliminating the backlash requires replacing the plastic rack bushing with a metal or bronze one, which increases the durability of the unit. These repair bushings are often oversized to compensate for housing wear.
Installation and bleeding of the hydraulic booster system
Installing the rack on the car is done in the reverse order. First, secure the assembly to the subframe, tighten the mounting bolts to the required torque, then attach the steering shaft and put the steering ends on the steering knuckles.
Connect the power steering hoses, making sure the connections are tight. Fill the power steering reservoir with new fluid to the maximum level. Start the engine and turn the steering wheel from lock to lock several times to expel air from the system.
While pumping, monitor the fluid level in the tank and add it if necessary. Air in the system is manifested by the characteristic noise of the pump and jerking of the steering wheel. If the noise continues, check for air leaks on the suction side.
- 🚗 Check the tightness of all mounting bolts after installation
- 🛢️ Fill the system with fresh fluid to normal
- 🔄 Bleed the system by turning the steering wheel at idle speed
- 🔍 Check for leaks at the hose connections
| Parameter | Meaning | Note |
|---|---|---|
| Liquid type | ATF Dexron II/III or PSF | Check the specification in the manual |
| Rack bolt tightening torque | 60-80 Nm | Use a torque wrench |
| Tightening torque for lugs | 40-50 Nm | Do not overtighten to avoid stripping the thread. |
| Volume of liquid in the system | 0.8 - 1.0 l | Depends on the volume of the tank and the length of the hoses |
After installation, be sure to visit the wheel alignment stand, since removing the steering rods inevitably violates the wheel alignment angles. Improper alignment can lead to rapid tire wear and unstable vehicle performance on the road.
Why is it important to do an alignment after repair?
Even a microscopic change in the angle of installation of the tie rods during assembly can lead to the car pulling to the side and uneven wear of the rubber. Neglecting this step will ruin all repair efforts.
Final check and operating tips
After all work is completed, test drive on a safe section of the road. Pay attention to the absence of knocks, the smoothness of the steering wheel and the operation of the amplifier at different speeds. If everything is normal, the repair can be considered successful.
To extend the service life of the repaired rack, avoid sharp impacts with the steering wheel when parking and regularly check the condition of the boots. Timely replacement of fluid in the power steering system also plays an important role in maintaining the functionality of the unit.
Use high-quality consumables and do not skimp on repair kits, as cheap oil seals may not withstand the load and quickly leak. Proper care and careful operation will allow you to forget about problems with your steering for many years.
⚠️ Attention: Regularly check the fluid level and condition of the power steering hoses, as their damage while moving can lead to a complete loss of control and an emergency.
Regular inspection of the boots and timely replacement of the fluid is the key to a long life of the steering rack after self-repair.
Frequently asked questions when repairing a steering rack
Is it possible to repair the rack without removing it from the car?
Theoretically, replacing oil seals is possible without removing them, but this is extremely inconvenient and requires a huge amount of time. For high-quality diagnostics and replacement of bushings, removal of the assembly is a prerequisite.
Which fluid is best for bleeding the system?
It is recommended to use the fluid specified by the manufacturer (usually ATF Dexron II or specialized PSF). Mixing different types of fluids is not permitted as this may damage the rubber seals.
How often do you need to do an alignment after repair?
After any intervention in the steering (removing the tips, replacing the rack), a wheel alignment is required. In the future, a scheduled check is recommended every 10-15 thousand kilometers.
What to do if there is still a knocking noise after the repair?
If the knocking noise persists, the wear in the bushing body may not have been eliminated or the adjusting bolt may not have been fully tightened. Also check the condition of the steering ends and subframe silent blocks.