Partial oil change in the Nissan Murano Z51 CVT: step-by-step guide

Crossover owners Nissan Murano second generation (Z51 body) are often faced with the need to service the transmission. The Jatco JF011E CVT variator installed on this model is highly reliable, provided that the working fluid is regularly updated. However, many car enthusiasts confuse the concepts of complete and partial replacement, which can lead to incorrect operation of the unit or increased lubricant consumption.

A partial replacement involves draining the oil from the pan and replacing it with a new one without using special equipment for flushing the system under pressure. This method allows you to renew from 35% to 45% of the total fluid volume, which is the optimal solution for scheduled maintenance. This is the approach recommended by transmission manufacturers to extend the life of clutches and valve body.

The procedure requires attention to detail and compliance with temperature conditions, since the oil level is checked while the engine is running. Ignoring this factor often results in the level being below normal, which causes overheating and rapid wear of internal components. In this article we will analyze in detail all the stages of work, the necessary tools and nuances specific to the model. Nissan Murano Z51.

Preparation and selection of transmission fluid

Before starting work, you must purchase consumables. For CVT Jatco JF011E Only specific standard liquid is suitable NS-3. The use of old specifications NS-2 or NS-1 is strictly prohibited, since their physical and chemical properties do not meet the requirements of modern belt drives.

The volume of oil in the pan during a partial replacement is about 4-4.5 liters. However, to guarantee the quality of work, it is recommended to purchase 5 liters at once, so that there is a reserve for refilling. You will also need a new pan (or filter if it is built into the pan, but on the Z51 only the coarse filter is often replaced) and a pan gasket if it is not included in the kit.

• 🛢️ Transmission fluid Nissan CVT Fluid NS-3 — original or certified analogue (Idemitsu CVT NS-3, Motul Multi CVT).
• 🔧 Variator filter (necessarily original or high-quality analogue, for example, Sakura or Van Wezel).
• 🔩 CVT pan gasket (if it is not integrated into the pan itself).
• 🧽 Rags and a container for draining used oil with a volume of at least 5 liters.

⚠️ Attention: Don't try to save money by using cheap oils from unknown brands. CVT on Nissan Murano Z51 extremely sensitive to viscosity and additive composition. An error in fluid selection can lead to belt slippage and costly torque converter repairs.

Also prepare a set of tools: a 10, 14 and 17 socket, a ratchet, an extension, a torque wrench (preferably) and a syringe for pumping oil. Don't forget about a lift or pit, as access to the variator housing from below is limited.

It is important to check the condition of the drain plug. On some copies Nissan Murano it may be stuck. If you plan to change the oil yourself, make sure you have a penetrating lubricant like WD-40 or similar to avoid stripping the threads when unscrewing.

Used oil drain procedure

The first step is to warm up the variator. It is necessary to drive the car for about 10-15 kilometers for the working fluid to reach operating temperature, approximately 50-60°C. You cannot drain cold oil, as it will be too thick and will not have time to drain, which will distort the final volume and level.

After stopping the engine, place the car on a level surface. Lift the car on a lift or drive it into a pit. Open the hood and remove the engine protection if it blocks access to the variator pan. Be careful: the oil will be hot, use gloves.

Locate the drain plug on the variator pan. It is usually located closer to the front. Place the prepared container and carefully unscrew the cap with a 17mm head. Immediately after this, a stream of hot oil will flow, so act quickly, but without panic.

• 🌡️ Make sure the engine is warmed up to operating temperature before draining.
• 🛢️ Use a wide container to prevent splashes of hot oil from hitting the hot elements of the exhaust system.
• 🔧 Check the condition of the magnet on the drain plug: collect metal shavings and estimate their quantity.

If large metal shavings or “silver” (aluminum particles) are found on the magnet, this is an alarming sign. Fine metal dust in the oil is normal, as clutches and bearings wear out, but large pieces indicate serious problems.

Let the oil drain completely. The process may take from 15 to 30 minutes. Do not try to speed it up by opening the filler neck from above - this will not help, since the oil will remain in the torque converter and oil channels.

⚠️ Attention: If you find large particles of friction material (black “porridge”) or metal shavings on the plug magnet, you must thoroughly rinse the pan and magnets with a solvent before assembly. Ignoring this step will result in abrasive being introduced into the fresh oil.

Replacing the filter and cleaning the pan

After the oil has been completely drained, you can begin removing the pan. It is secured with 10-12 bolts. Unscrew them crosswise to avoid damaging the gasket. Be prepared for about 1 liter of oil remaining inside the pan - carefully drain it into a container.

After removing the pan, you will see a coarse filter (mesh). On Nissan Murano Z51 it is often bolted on or simply inserted into the housing. It needs to be replaced. Cleaning old mesh is ineffective, as the pores become clogged at the microscopic level.

Inspect the pallet body. If there are signs of corrosion or deformation on it, it is better to replace it entirely. Manufacturers often sell the pan assembled with a filter, which simplifies the task. If you are only changing the filter, make sure it fits snugly in the seat.

Thoroughly clean the seating surface of the pan from the old gasket. Use a plastic scraper or soft cloth soaked in solvent. No abrasive brushes or knives should be used to avoid damaging the metal.

• 🧹 Use a special carburetor cleaner to remove oil deposits from the inner surface of the pan.
• 🔩 Check the pallet mounting bolts: if they are stretched or torn, replace them with new ones.
• 📄 Apply new sealant only if you do not have the factory gasket (but it is better to use the original gasket).

Installing the pan and filling in new oil

After cleaning and replacing the filter, reinstall the pan. If a gasket is used, apply a small amount of sealant around the edges (if the gasket manufacturer's instructions provide this), but most sealant is not needed. Tighten the pan bolts with a torque wrench to about 3-5 Nm so as not to push through the metal.

Replace the drain plug with a new copper washer. The tightening force should be within 30-40 Nm. A pinched plug can strip the threads in the CVT housing, which will be disastrous. A loose plug will cause a leak.

Now let's move on to filling. Open the hood and locate the CVT filler neck. It usually has a hexagon thread or a regular plug. Insert the syringe with the tube and pump in new oil. Start with a volume of 4 liters.

Make sure that the oil does not contain foreign impurities. Fill slowly to avoid air pockets. Air in the hydraulic system can cause kicking and jerking when changing gears. If you have access to a diagnostic connector, you can connect a scan tool and monitor the level in real time, but this is not necessary for a partial replacement.

⚠️ Attention: Do not pour oil above the level of the inspection hole at the initial stage. Overfilling will cause the working fluid to foam, which will reduce cooling efficiency and may cause water hammer.

Screw on the filler plug, but do not tighten it all the way as you will have to open it again to check the level. Get into the car and start the engine.

Move the automatic transmission selector to all positions (P, R, N, D), holding each position for 3-5 seconds. This will help fill the torque converter and oil passages with new fluid. Return the selector lever to position P.

Checking the level and final topping up

This is the most critical stage. Oil level in the variator Nissan Murano Z51 checked with the engine running and the transmission warm. The oil temperature should be in the range of 35-45°C. If you do not have a diagnostic scanner to read the exact temperature, rely on the on-board computer readings or warm up the car for 5-7 minutes in mode D with the brake on.

With the engine warm, unscrew the filler plug. If oil begins to flow out of the hole, it means the level is sufficient (or even excessive). If there is no oil, add it in small portions through a syringe until it begins to flow out of the control hole.

The optimal level is when the oil simply begins to ooze out of the hole under the influence of gravity. Don't wait for the stream to flow. As soon as drops or a thin stream appear, tighten the plug and tighten it with a force of 15-20 Nm.

After installing the plug, let the car run for another 2-3 minutes, then turn off the engine. Check for leaks under the car. Pay special attention to the location of the drain plug and pan.

• 🌡️ Ideal temperature to check the level: 40-50°C. At lower temperatures the level will be lower, at higher temperatures it will be higher.
• ⚙️ The engine should be idling while checking the level.
• 🔧 Only use a torque wrench to tighten the plug to avoid stripping the thread.

Nuances of operation after replacement

After completing the oil change procedure, aggressive driving should be avoided for the first 500-1000 kilometers. The variator needs time to adapt to the new properties of the fluid. Avoid sudden starts and slipping.

Pay attention to the operation of the gear selector. Jerks or kicks may persist at first, as the old dirt in the valve body is gradually washed away. If symptoms worsen, it may need to be replaced or flushed again.

It is recommended to check the oil level again after 1000 km. During this time, the remaining old oil may leak out and the level will drop. If the level has dropped, add a little more fluid.

Parameter	Meaning	Note
Oil volume in the system	~10.5 liters	Full volume including torque converter
Volume for partial replacement	4.0 - 4.5 liters	Volume drained from the pan
Liquid type	Nissan CVT Fluid NS-3	Strictly conforms to NS-3 standard
Check temperature	35-55°C	Engine running
Drain plug tightening torque	30-40 Nm	Use a new washer

Possible errors and their consequences

The most common mistake is choosing the wrong temperature to check the level. If you test the oil cold, you will add too much oil, causing foaming and overheating. If checked too hot the level will be low causing oil starvation.

Another common mistake is using low-quality filters. Cheap alternatives often have low throughput or ineffective filtration. This can lead to clogging of the valve body solenoids and damage to the variator.

Ignoring the condition of the magnets on the drain plug is also dangerous. If you don't clean the magnets before reassembling, you will simply transfer dirt into the fresh oil. This will shorten the interval between replacements significantly.

Some owners try to perform a complete oil change using the displacement method. On Nissan Murano Z51 This is risky as an old unit can create excess pressure and damage the seals. Partial replacement is the safest and most effective method for do-it-yourself maintenance.

What to do if jerking occurs after changing the oil?

If jerking appears immediately after replacement, do not panic. Let the variator operate in modes D and R for 5 minutes. If the problem does not disappear after 100 km, check the oil level. Perhaps it is underestimated or overestimated. Also check whether dirt has entered the hydraulic unit when replacing the filter.

Frequently asked questions (FAQ)

How many times do you need to do a partial change for a complete oil change?

To completely update the oil volume in the variator Nissan Murano Z51 it is necessary to carry out 3-4 cyclic replacements. Each partial replacement renews about 35-40% of the fluid. After the 3rd change, less than 5% of the old oil will remain in the system.

Is it possible to mix original NS-3 oil with analogues?

Yes, if the analogue has official NS-3 certification. However, it is better to use the same brand in all replacement cycles. Mixing different brands is possible, but not recommended, as additive packages may conflict.

What happens if you pour oil into the variator?

Overfilling will cause the rotating parts to whip the butter into foam. Foam does not have lubricating properties and does not remove heat well. This will cause the CVT to overheat, belt slippage and ultimately torque converter failure.

How often do you need to change the oil in the Nissan Murano Z51 CVT?

The recommended interval for partial replacement is every 40-50 thousand kilometers. For a complete replacement (cyclic), the interval can be reduced to 30-35 thousand km. In severe operating conditions (off-road, traffic jams), the interval should be reduced by 20%.

Do I need to change the filter every partial oil change?

It is recommended to change the coarse filter (mesh) every 2-3 cyclic oil changes, that is, approximately every 100-120 thousand km. However, if you see a lot of chips on the magnets, it is better to replace the filter immediately. The fine filter (inside the hydraulic unit) is changed only during major repairs.

Regular servicing of the variator is the key to the long life of your Nissan Murano Z51. Partial oil changes are the safest and most effective method of maintaining transmission performance without the risk of damaging the valve body. By following these instructions, you can independently extend the life of your car and avoid costly repairs.

Remember that the transmission is the heart of the car, and its health directly depends on the quality and quantity of the working fluid. Don’t skimp on oil and filters, because the cost of replacement is not comparable to the cost of replacing the entire variator.

If you doubt your abilities or do not have the necessary equipment, entrust the work to professionals. But if you are ready to do the work yourself, this article will become your reliable guide in the world of CVT maintenance.