Vehicle braking system Nissan Terrano 2 is a critical element, the serviceability of which directly affects the safety of the driver and passengers. The heart of this hydraulic circuit is the brake master cylinder, which converts the mechanical force on the pedal into brake fluid pressure.
Over time, the resource of this node is exhausted, which can lead to serious consequences. If you notice a soft pedal, its sinking, or the need to constantly add fluid to the reservoir, these are clear signs of a malfunction master cylinder.
Ignoring these symptoms is unacceptable, as brake failure at speed can be fatal. SUV owners must understand the operating principle of the unit and be able to recognize signs of breakdown in time for timely repair.
Design and principle of operation of the node on Terrano 2
Brake master cylinder (GTC) on the model Nissan Terrano 2 is a complex hydraulic mechanism integrated with a vacuum booster. Inside the housing there are two pistons separated by a partition, which ensures the operation of two independent circuits of the brake system.
When you press the brake pedal, the vacuum booster rod presses on the first piston, creating pressure in the front circuit. If the first circuit is faulty, the second circuit is activated, providing at least partial braking effectiveness. This separate circuit improves the overall reliability of the vehicle.
The key element is the rubber cuffs, which lose elasticity over time. When the seals no longer seal the chamber, fluid begins to flow from the working zone to the return zone, causing a drop in pressure. Exactly cuff wear is the most common cause of GTZ failure.
It is important to consider that the system operates under high pressure, reaching tens of atmospheres during emergency braking. Any microcrack in the housing or piston defect can lead to instant failure of the entire system.
Typical symptoms of a bad master cylinder
Problems with the master cylinder can be recognized by a number of characteristic signs that cannot be confused with other failures. The most obvious symptom is a change in the behavior of the brake pedal. It may become “woolly”, sink to the floor, or, conversely, become excessively hard.
If you feel that you have to use more and more force to stop the car or press the pedal several times, this is a sure sign of loss of tightness. Also pay attention to the brake fluid level in the expansion tank. Its regular decrease without visible external leaks often indicates a leak inside the vacuum booster.
- 🛑 The brake pedal slowly goes to the floor with constant pressure
- 🛑 The braking distance has increased and the car’s response to pressure has worsened.
- 🛑 There is a smell of burnt brake fluid in the cabin or under the hood
- 🛑 Strange sounds (squelching) when pressing the brake pedal
Sometimes the malfunction is accompanied by fluid leakage directly from under the reservoir cap or at the junction of the cylinder with the amplifier. In such cases, repairs cannot be postponed even for a day.
⚠️ Attention: If you find traces of brake fluid on the vacuum booster, stop using the vehicle immediately. Liquid entering the amplifier membrane leads to its destruction and loss of power of the vacuum effect.
Choosing a quality replacement part
When selecting a new brake master cylinder for Nissan Terrano 2 It is important not to make a mistake with the article number, since there are different modifications for different types of engines and years of manufacture. Original from Nissan will always be the best solution, but it may be overpriced.
There are high-quality analogues on the market from trusted brands, which often surpass the original in terms of service life. Manufacturers like Brembo, TRW or ATE produce reliable GTZs specially adapted for Japanese SUVs.
Be sure to check the package: the box should contain new copper washers, mounting bolts and, preferably, a set of rubber seals. Cheap fakes often have casting defects, which leads to rapid destruction of the pistons.
| Manufacturer | Approximate price | Quality | Resource (km) |
|---|---|---|---|
| Nissan (Original) | High | Excellent | 100 000+ |
| Brembo | Average | Very good | 80 000 - 120 000 |
| TRW | Average | good | 70 000 - 100 000 |
| Cheap analogues | Low | Risky | Up to 30,000 |
- Nissan (Original)
- Brembo
- TRW
- ATE
- I don't know
Step-by-step instructions for replacing the GTZ
The process of replacing the brake master cylinder requires care and the availability of appropriate tools. Before starting work, it is necessary to turn off the power to the vehicle and provide access to the engine compartment. Unscrew the nuts securing the cylinder to the vacuum booster using a socket on 14 mm or 17 mm depending on modification.
Before disconnecting the brake pipes, be sure to prepare containers to drain any remaining fluid. Unscrew the pipe fittings and plug them to prevent dirt from getting inside the system. Then remove the cylinder itself, being careful not to damage the vacuum hose going to the booster.
- 🔧 Remove the brake fluid reservoir and clean the installation area
- 🔧 Unscrew the four nuts securing the GTZ to the vacuum booster
- 🔧 Carefully disconnect the brake pipes, plug the holes
- 🔧 Install the new cylinder, tighten the nuts to torque
20-25 Nm
☑️ Replacement tools
Installation of a new unit is carried out in the reverse order. It is important not to overtighten the brake pipe fittings so as not to strip the threads in the new cylinder body. After mechanical installation, you need to proceed to bleeding the system.
Common mistakes when replacing
The most common mistake is air getting into the system due to quickly unscrewing the tubes. It is also not recommended to use old liquid, since it is already saturated with moisture and has a reduced boiling point.
⚠️ Attention: Never start the engine without first bleeding the brake system. This can lead to a complete lack of brakes and an accident the first time you press the pedal.
Bleeding the system and checking for leaks
After installing a new master cylinder, the system must be bled to remove air. The air in the hydraulics is compressed, making the brakes ineffective. The process begins with pumping the gas turbine engine itself, if this is provided for by the design, and then there is a sequential pumping of the wheels.
The pumping order is usually as follows: rear right wheel, rear left, front right, front left. Use quality brake fluid DOT 4 or DOT 5.1compliant with specification Nissan. Mixing different types of liquids is strictly prohibited.
The process can be performed by two people: one presses the pedal, the other unscrews the fitting on the caliper. Or use a vacuum pump for bleeding alone. Monitor the fluid level in the tank; it should not fall below the minimum.
- 🚿 Use only fresh brake fluid from a closed container
- 🚿 Make sure that the fluid level in the tank does not fall below the minimum mark
- 🚿 Bleed the system until clean air-free bubbles appear
- 🚿 Check the tightness of all connections after bleeding
Before starting pumping, remove the reservoir cap and check the condition of the liquid level sensor float - it should move freely and not stick.
After completion of work, it is necessary to check the tightness of the connections. Start the engine and press the brake pedal several times. It should become elastic and not fall through. If the pedal remains soft, there may be air remaining in the system or the new cylinder may have a manufacturing defect.
A properly pumped system provides instant pedal response and maximum braking force, which is critical for safety off-road and in the city.
Operation and prevention of breakdowns
In order for a new brake master cylinder to last for a long time, it is necessary to follow the rules of operation and regular maintenance. Brake fluid is hygroscopic, meaning it actively absorbs moisture from the air. This reduces its boiling point and leads to corrosion of the internal cavities of the cylinder.
It is recommended to change the brake fluid every 2 years or 40,000 km mileage, regardless of its appearance. It is also important to monitor the condition of the rubber pipes leading to the tank and check the tightness of the vacuum hose.
If you often use Nissan Terrano 2 in difficult conditions, for example, off-road or in the mountains, the service life of the braking system is reduced. In such cases, inspect the unit more often and change the fluid annually.
Use original brake fluid or certified high-class analogues. Cheap products may contain impurities that can destroy rubber seals and cause pistons to seize.
Regularly changing your brake fluid is the cheapest and most effective way to extend the life of your brake master cylinder and your vehicle's entire hydraulic system.
Owner Frequently Asked Questions (FAQ)
Can the brake master cylinder be repaired?
Theoretically, repairs are possible by replacing the repair kit (cuffs and springs), but in practice this rarely gives a durable result. The housing often has micro-scratches from worn pistons through which new fluid will flow. It is better to immediately replace the entire assembly.
How much brake fluid does it take to bleed?
For complete replacement and bleeding of the system Nissan Terrano 2 it will take approximately 1 liter fresh liquid. Buy fluid with a reserve, as part of it will be spent on flushing the system and possible errors during pumping.
Why does the brake pedal become soft after replacing the GTZ?
Most likely there is air left in the system. Try repeating the bleeding procedure, paying special attention to the master cylinder. Also check to see if the vacuum hose connection has been overtightened, which could interfere with the operation of the booster.
What is the tightening torque for the GTZ mounting nuts?
The nuts securing the master cylinder to the vacuum booster should be tightened to a torque 20-25 Nm. Brake pipe fittings are torque-tightened 15-18 Nm. Use a torque wrench for accuracy.
Replacing the master brake cylinder with Nissan Terrano 2 - a task that any car owner with basic repair skills can handle. The main thing is not to skimp on spare parts and follow safety precautions. Remember that good brakes are the key to your life and the lives of those around you.
⚠️ Attention: Work in a well-ventilated area. Brake fluid is toxic and flammable. Avoid getting it on your car's paintwork, as it will corrode the paint.
By following these recommendations, you can independently diagnose and fix a problem with the brake system, saving significant money on car service costs. Regular monitoring of the condition of components guarantees your safety on any type of road.
The Nissan Terrano 2 master brake cylinder requires replacement at the first sign of pedal failure, as this is a direct path to brake failure.