Many crossover owners Nissan Murano second generation models encounter an unexpected problem when trying to check the technical condition of the transmission. The standard procedure for diagnosing the oil level in a gearbox turns into a puzzle, since the design features CVT do not imply the presence of the usual dipstick in the engine compartment. This often confuses drivers accustomed to classic automatic transmissions, where it is enough to simply pull the handle out of the engine compartment.
In fact, the question of how to remove the variator dipstick is incorrect from a technical point of view for most configurations, but has a logical solution in the presence of specific modifications or misconceptions. In reality, the procedure boils down to removing the plug on the gearbox housing or searching for a hidden access element, if provided by the manufacturer for your market. Understanding this difference is critical to avoid damaging expensive transmission components when trying to locate a component that does not exist.
Design features of the CVT lubrication system on the Nissan Murano Z51
CVT gearbox on the model Nissan Murano Z51 designed taking into account the requirements for tightness and minimizing losses of working fluid. Engineers abandoned the traditional dipstick, which could become a source of leaks or a place for dust and dirt to get inside the mechanism. Instead, a control system is used through an inspection hole on the crankcase, located in a hard-to-reach place under the car.
This approach is dictated by the need to maintain a stable level transmission fluid at different operating temperatures. In the engine compartment you will not find a single handle or ring that could be pulled towards you. Any attempt to locate the dipstick on top of the engine or near the battery will be unsuccessful and may result in wasted time.
The exception is rare export versions or cars that have undergone specific modifications in service centers where an adaptive probe could be installed. However, the standard configuration Nissan Murano Z51 for the Russian and European markets strictly follows the “no dipstick” standard. This means that to check the level it is necessary to raise the car on a lift.
Why can't you find the dipstick in the engine compartment and where is it actually?
Many car enthusiasts, when faced with the need to service a CVT for the first time, begin an active search in the engine compartment, checking all possible pipes and tubes. It is important to understand that the absence of a familiar element is not a defect, but a thoughtful engineering feature. Attempts to “find” it using a flashlight or mirrors often only end in disappointment.
The only place where a visual inspection or level measurement element can be located is the lower part of the transmission housing. Access to this unit is provided exclusively from below, which requires an inspection hole or overpass. On some modifications it is installed there control bolt, which performs the function of a probe when unscrewing it.
If you are still sure that your car should have a dipstick, check the package. Sometimes owners get confused Nissan Murano with other models or are considering modifications for the Asian market, where service rules may differ. In most cases, under the hood you will only find a filling hole through a special bucket or funnel, but not a dipstick.
Tools and preparation for accessing the transmission
To perform the fluid level check procedure, you will need a tool kit that includes jacks, stands, and wrenches for drain and fill plugs. A regular set of keys from the garage may not be enough, as the bolts may be stuck due to dirt and reagents. Use a torque wrench to accurately tighten the plugs after completion of the job.
- 🔧 Set of sockets and ratchets (sizes 10, 14, 17, 24 mm)
- 🛡️ Protective clothing and gloves for working with hot liquids
- 🏗️ Reliable stands under the car body for safety
Before starting work, it is necessary to warm up the engine and variator to operating temperature. This is a critical step because liquid level depends on its expansion when heated. Cold fluid will take up less volume, and you will get a false impression that there is a lack of oil in the system.
- Automatic (AT)
- CVT (CVT)
- Mechanical (MT)
- I don't know
Step-by-step instructions for checking the level through the inspection hole
The process of replacing level control with Nissan Murano Z51 looks like this: the car is raised on a lift, and the mechanic finds the drain plug on the variator housing. Next to it there is usually a control hole, closed with a bolt of smaller diameter. It is this bolt that needs to be unscrewed to check the level.
If liquid begins to flow from the hole, then the level is normal. If the liquid does not flow, but only flows out in drops or does not flow out at all, topping up is required. To do this, use a syringe or funnel through the filling hole located on the other side of the box or in the engine compartment (depending on the specific revision).
It is important to observe the temperature regime: the liquid should be heated to 40–50°C for the initial test and to 80°C for the final test. This is standard procedure for all modern Jatco CVTs. Ignoring temperature standards will lead to erroneous conclusions and possible overfilling or underfilling of oil.
☑️ Checking the CVT oil level
⚠️ Attention: Do not try to unscrew the control bolt if the variator is overheated. High temperature liquid can cause severe skin burns. Allow the system to cool slightly, but not completely.
The nuances of working with a probe bolt and possible problems
In rare cases, when the owner insists on the presence of a probe, we can talk about a bolt, which in appearance resembles a probe, but has a threaded connection. Unscrewing it requires caution, as stripped threads in the aluminum crankcase body will become a serious problem. Use a quality tool to avoid licking off the edges.
Sometimes the bolt may become stuck due to oxidation. In such a situation, you should not make excessive efforts. It is better to pre-treat the joint with a penetrating lubricant and give it time to work. If the bolt does not budge, it may need to be drilled out, which is a difficult operation.
For Nissan Murano Z51 A characteristic design is where the control hole is located at the bottom of the pan. This means that you may lose some fluid when you remove the bolt. Be sure to prepare a container to collect the draining oil so as not to stain the bottom of the car and not pollute the environment.
Why might a bolt be stuck?
Over time, road dirt and chemicals accumulate in the crankcase area, creating a corrosive environment. The aluminum body and steel bolt have different coefficients of thermal expansion, which, when cyclically heated and cooled, leads to “seizing” of the thread.
Features of choosing and replacing transmission fluid
Nissan CVTs use a special fluid NS-2 or NS-3, depending on the year of manufacture and type of box. Using the wrong oil can cause rapid wear of the variator belt and cones. Never mix different types of liquids, as their chemical composition may not be the same.
- 🛢️ Original Nissan NS-2 fluid for early versions
- 🛢️ Improved Nissan NS-3 fluid for newer models
- 🛢️ Analog oils with JATCO CVT Fluid approval
When replacing, it is important not only to add the required volume, but also to completely remove the old fluid. To do this, several replacement cycles are carried out through draining and refilling. A full replacement requires specialized equipment, but a partial replacement can be done yourself with patience.
Before purchasing oil, be sure to check the vehicle's VIN code in the spare parts catalog. A mistake in choosing the type of fluid (NS-2 instead of NS-3) can cost you repairs to the variator, which amounts to hundreds of thousands of rubles.
Typical mistakes when checking the level yourself
One of the most common mistakes is trying to check the level on a cold engine. The fluid is compressed and its level drops below the inspection hole, which creates a false impression of a lack of oil. As a result, the driver adds too much, which leads to foaming and overheating of the variator.
Another mistake is ignoring the condition of the bolt itself. If the threads are damaged or the gasket under the bolt head is worn, leaks will occur even with normal fluid levels. Inspect this area regularly after each inspection.
Some owners try to use dipsticks from other cars by inserting them into the inspection hole. This is strictly prohibited, as a foreign object may damage the internal components of the CVT or become stuck inside, which will require complete disassembly of the transmission.
| Parameter | Meaning | Note |
|---|---|---|
| Liquid type | Nissan NS-2 / NS-3 | Depends on year of manufacture |
| Operating temperature | 40-50°C / 80°C | Two-step verification |
| Control bolt size | 14 mm | Hexagon |
| System volume | ~7.5 liters | With complete replacement |
The fluid level in the Nissan Murano Z51 CVT is controlled through the inspection hole on the crankcase, and not through the dipstick in the engine compartment.
When is professional diagnostics needed?
If you are not confident in your abilities or do not have the necessary equipment to safely lift your car, it is better to entrust this job to professionals. Incorrect operation can lead to leaks, oil contamination, or even transmission failure. Service centers have the necessary tools and experience working with CVTs.
It is especially important to contact a specialist if you notice signs of a malfunction: jerking when switching, a hum, a burning smell, or the Check Engine light coming on. In such cases, checking the level yourself may not be sufficient and will require computer diagnostics.
Remember that a variator is a complex and expensive device. Its reliability directly depends on the quality of service and timely replacement of consumables. Regularly checking the level and condition of the fluid is the key to the long service life of your Nissan Murano.
⚠️ Attention: If you find metal shavings on the control bolt or drain plug, immediately stop using the vehicle and contact service. This is a sign of catastrophic wear of the internal components of the variator.
Final recommendations for use
Following proper maintenance procedures and using the right materials is the foundation for a long life for your vehicle. Do not skimp on oil quality or neglect level checking procedures. This will avoid costly repairs and maintain the comfort of driving your crossover.
Always check the fluid level according to the manufacturer's instructions, taking into account temperature conditions. If you are in doubt about the correct action, refer to official service manuals or consult with experienced mechanics.
Remember that every vehicle is unique and even small deviations in maintenance procedures can have serious consequences. Approach service transmissions with maximum responsibility and attention to detail.
What to do if the fluid level is higher than normal?
Overfilling the variator with oil is just as dangerous as undershooting it. Excess fluid begins to foam as the gears rotate, resulting in loss of pressure and overheating. To remove excess fluid, you need to unscrew the control bolt and drain the excess, then check the level again.
Frequently asked questions from Nissan Murano Z51 owners
Is there a dipstick on the Nissan Murano Z51 CVT?
As standard for most markets (including Russia), there is no dipstick in the engine compartment. Level control is carried out through the control hole on the gearbox housing at the bottom of the car.
What fluid should I use for testing?
Use only original Nissan NS-2 or NS-3 fluid (depending on model year). The use of analogues without the appropriate approval may lead to damage to the variator.
Is it possible to check the level on a cold engine?
No, the level check must be carried out at operating fluid temperature (approx. 80°C for final check). On a cold engine, the level will be lower than actual, which will lead to erroneous conclusions.
How often should you check the oil level in the variator?
It is recommended to check the level and condition of the fluid every 15-20 thousand kilometers or when symptoms of a malfunction appear (jerking, humming, odors).
What should I do if oil is leaking from the inspection hole?
If the oil flows in a stream when the bolt is unscrewed on a warm engine, this may indicate an overflow. If it flows in drops, the level is normal. If it does not flow, topping up is required.