Crossover owners Nissan Murano the second generation (Z50 body) eventually faces the need to service the transmission. The Jatco JF011E variator installed on these cars is a high-tech unit that requires the impeccable condition of the working fluid. This is where it comes to the fore fine filter, which is often ignored during standard maintenance, which leads to irreversible consequences.
Many car owners mistakenly believe that replacing only a coarse mesh or partially changing the oil is sufficient for a long life of the unit. However, it is the thin filter that catches the smallest particles of friction wear and metal, preventing them from circulating in the valve body. Neglecting this element is a direct path to expensive repairs or complete replacement. variator.
In this article we will look in detail at how to choose the right fine filter, what nuances exist when installing on Murano Z50 and why saving on this part can result in the loss of a significant amount of money. You will learn how to distinguish an original from a fake and what mistakes even experienced craftsmen make.
The role of the fine filter in the Jatco JF011E system
Variator lubrication and hydraulic control system Nissan Murano The Z50 operates under high pressure. Oil not only lubricates gears and bearings, but also transmits torque through the torque converter and controls the clutches. Any contamination of the liquid disrupts these processes. The coarse filter, which is a metal mesh, traps large particles but allows fine suspended matter to pass through.
Exactly fine filter (often called a “bag filter” or “filter inside the housing”) takes on the main burden of cleaning the oil from wear products. It catches the smallest particles of metal, rubber from seals and friction dust. If this element becomes clogged, the pressure in the system drops, which leads to belt slippage and shock when shifting gears.
It is important to understand that the life of this filter directly depends on the quality of the oil and operating conditions. In city traffic jams with constant starts and stops, the load on the variator is maximum, and pollution occurs faster. Regular replacement fine filter - this is not a whim, but a necessity to maintain the performance of the transmission.
Article number and choice of original filter
When choosing spare parts for Nissan Murano For the Z50, it is critical that you target the correct part numbers. Original fine filter has an article number 31726-1XV2A. There is also a coarse filter with number 31726-1XV2B, which is changed along with the thin one. Often there are kits on sale that include both filters and a pan gasket.
There are many analogues from third-party manufacturers on the auto parts market. Some brands offer high-quality substitutes, but the risk of running into low-quality products is very high. Cheap filters may have insufficient filtration area or use low-quality materials that are quickly destroyed by oil and pressure.
- 🔍 Always check the markings on the filter housing before installation.
- 🔍 Compare the size and shape of the O-rings with the original.
- 🔍 Avoid buying filters without packaging and protective film.
Particular attention should be paid to the production date. The rubber seals on the filter become tanned over time, even during storage. If you bought a spare part that has been in storage for several years, its seal may be compromised. It is better to look for fresh supplies from trusted suppliers.
⚠️ Attention: Installing a non-original filter with a low-quality porous structure can lead to its rupture under pressure, which will instantly disable the variator.
Some experts recommend changing the filter only when the mileage is more than 100,000 km, but this is misleading. For Murano Z50 with a Jatco variator, the optimal replacement interval is 60,000 km. It is at this mileage that the filter loses its properties and ceases to effectively capture contaminants.
Transmission condition diagnostics
Before proceeding with the replacement, it is necessary to assess the current condition of the oil and the variator as a whole. If you notice a jerk when starting off or changing gears, this may be a sign of a clogged filter. Problems are also indicated by the noise of the hydraulic pump, which becomes audible when the engine is running.
Remove the pan and inspect the coarse filter. The presence of a large amount of metal shavings, especially magnetic ones, indicates active wear of the internal components. In this case, replacing the filter may not save the situation, and more serious repairs will be required. But if the oil is clean and the filter is black, that's a sure sign that it's doing its job.
- 🛠️ Check the magnets at the bottom of the tray: a lot of metal chips is an alarming sign.
- 🛠️ Inspect the filter sealing ring: it should not have cracks.
- 🛠️ Evaluate the color and smell of the oil: it should not smell burnt.
Sometimes the problem lies not in the filter itself, but in the valve body. If the valve body channels are contaminated with wear products, even a new filter will quickly clog. In such cases, professional cleaning or replacement of the valve body is required, and not just replacing the filter.
- Up to 60,000 km
- 60,000 - 100,000 km
- More than 100,000 km
- I don't know for sure
Step-by-step instructions for replacing the filter
The process of replacing the fine filter with Nissan Murano The Z50 requires precision and consistency. You will need a lift or inspection hole, a set of wrenches, a new pan gasket and the filter itself. It is better to carry out work on a warm engine so that the oil is less viscous.
First you need to drain the old oil through the drain hole. Then unscrew the bolts securing the pallet and carefully remove it. Be careful as there will be a significant amount of oil left inside. After removing the pan, you will see a coarse filter and a fine filter attached to the variator body.
☑️ Replacing the fine filter
To dismantle the fine filter, a special wrench or adapter is often required, since its head has a non-standard shape. Unscrew the old filter and immediately inspect the installation site for damage. Install the new filter and tighten it to the recommended torque, but do not overtighten as this may strip the threads.
Clean the pan of old sealant and metal shavings. Wash it with solvent and let it dry. Install a new gasket or apply a thin layer of sealant, if required by the design. Reinstall the pan and tighten the bolts in the specified sequence.
⚠️ Attention: Insufficient tightening of the pan bolts can lead to oil leakage, and overtightening can lead to deformation of the pan and a violation of the tightness.
After assembly, fill in new oil through the dipstick or filler hole. Start the engine and let it idle. Check the oil level and add if necessary. Scroll the automatic transmission selector through all positions, holding each position for a few seconds.
Correct installation of the gasket and compliance with the tightening torque of the pan bolts is the key to avoiding oil leaks in the future.
Typical maintenance errors
One of the most common mistakes is ignoring the replacement of the coarse filter along with the fine one. Some craftsmen change only the thin filter, considering the mesh to be “eternal”. This is incorrect because the mesh also becomes clogged and restricts the flow of oil, creating a bottleneck effect.
Another mistake is using the wrong sealant. Jatco CVTs require special sealants that are resistant to high temperatures and transmission oil. Regular silicone sealant can dissolve and get inside the variator, clogging the thin passages.
- ❌ Do not use sealant instead of a gasket if it is provided for in the design.
- ❌ Do not save on oil by buying cheap analogues of unknown brands.
- ❌ Don't forget to change the drain plug gasket.
It is also worth noting the error associated with the incorrect oil level. If there is little oil, the variator will work with air pockets, which will lead to overheating and accelerated wear. If there is a lot of oil, it will begin to foam and be squeezed out through the breather.
What happens if you mix up the filters?
Coarse and fine filters have different designs and purposes. Installing a fine filter instead of a coarse mesh will immediately clog it and stop the pump.
Features of Jatco variator oil
For CVT Nissan Murano Z50 is suitable only for specific oil that meets the standard NS-2 or NS-3 (depending on the year of manufacture and modification). Using oil of a different specification is unacceptable and may lead to failure of the variator. Check the manufacturer's recommendations in the instruction manual.
Oil NS-2 intended for older CVTs, whereas NS-3 used in newer models. Mixing these oils is strictly prohibited. When completely changing the oil along with the filter, it is better to use original oil from Nissan or certified analogues from trusted brands such as Idemitsu.
The amount of oil in the system varies. With a partial replacement, about 4-5 liters will be required, with a full replacement - up to 9-10 liters. Please take this into account when purchasing supplies. Do not forget that after replacing the filter and oil, it is necessary to carry out the variator adaptation training procedure.
Before starting work, be sure to remove the negative terminal from the battery to avoid accidental short circuits when disconnecting the sensors.
Frequently asked questions and answers
Below are answers to the most frequently asked questions from owners. Nissan Murano Z50 regarding CVT maintenance and filter replacement.
Do I need to change the filter at every oil change?
When doing a partial oil change, it is not necessary to change the filter, but when doing a full oil change (especially with flushing the system), replacing the fine filter is highly recommended for maximum efficiency.
Is it possible to wash the fine filter?
No, the fine filter is a consumable item and cannot be washed or restored. Its porous structure becomes clogged irreversibly, and an attempt to wash it will not restore its filtration properties.
How long does it take to replace a filter?
If you have experience and the necessary tools, replacing a fine filter along with a pan takes from 1.5 to 2.5 hours. Including time for oil cooling and adaptation.
What to do if the fine filter does not unscrew?
If the filter is stuck, do not use excessive force. Use special pullers or heat the joint (if the design allows). In extreme cases, careful drilling will be required, but this is a risky operation.
How to check the oil level in the variator?
The level is checked on a warm engine (oil temperature 40-60°C), with the engine running and the selector in position P. The level must be between the marks Hot on the dipstick.
Timely transmission service Nissan Murano Z50 guarantees long and reliable operation of the car. Do not put off visiting a service center or replacing the filter yourself until symptoms of a breakdown appear. Prevention is always cheaper and easier than major repairs.
Remember that a variator is a complex system where each element plays an important role. The quality of parts, correct installation and materials used directly affect the service life of the unit. Be attentive to your car, and it will repay you with trouble-free operation.