Changing the oil in a Nissan Almera N16 manual transmission: a complete guide with nuances

Nissan Almera N16 is one of the most popular foreign cars on the secondary market, valued for its reliability and maintainability. However, even such an “indestructible” car has components that require regular maintenance. Manual transmission (MT) not eternal — over time, the oil in it loses its properties, which leads to accelerated wear of gears and synchronizers. Unlike an automatic transmission, where oil changes are prescribed in the regulations, many owners forget about manual transmissions - and in vain.

If you notice that gear shifting has become less clear, there is a crunch when engaging reverse or first gear, and the lever “walks” tightly - this is a direct signal to check the condition of the transmission oil. In this article we will look at all stages of changing the oil in a manual transmission Nissan Almera N16: from the choice of consumables to the subtleties of filling that cannot be found in standard manuals. We'll also tell you why the use of cheap oil analogues can result in gearbox repairs after 20,000 km.

When and why you need to change the oil in the Almera N16 manual transmission

Manufacturer Nissan states that the oil in the manual transmission Almera N16 (unit code RS5F31V or FS5R31A) filled for the entire service life. But this statement is true only for “ideal” operating conditions: moderate climate, no traffic jams, careful driving. In reality:

• 🔥 High loads: Frequent driving in traffic jams, towing a trailer or aggressive driving style accelerates oil degradation by 2-3 times.
• ❄️ Extreme temperatures: Frosts below –20°C and heat above +30°C destroy additives, the oil thickens or thins.
• ⚙️ Synchronizer wear: When driving over 100,000 km, metal shavings accumulate in the oil, impairing its lubricating properties.
• 🚗 Buying a used car: If the service history is unknown, changing the oil in the manual transmission is mandatory - the previous owner could have filled in a low-quality product.

Experienced technicians recommend changing the manual transmission oil Almera N16 every 60,000–80,000 km or once every 4–5 years (whichever comes first). If the car is used in difficult conditions (taxi, courier delivery, off-road), the interval is reduced to 40,000–50,000 km.

⚠️ Attention: If, when checking the oil level on the dipstick (if there is one) or through the filler hole, you find metal shavings, a black color of the oil or a burning smell, the box is already worn out. In this case, changing the oil can only delay the repair for a short time.

What kind of oil to fill in manual transmission Nissan Almera N16

Oil selection is a critical step. The wrong product may cause increased box noise, Difficulty shifting gears or even failure of synchronizers. For Almera N16 Oils with the following characteristics are suitable for manual transmissions:

Parameter	Recommended value	Acceptable analogues
Oil type	Synthetic or semi-synthetic	Mineral - only for old boxes with mileage >200,000 km
Viscosity grade (SAE)	75W-80 or 75W-90	80W-90 (for hot climates)
API Specification	GL-4 or GL-4/5	GL-5 - only if indicated in the manual of your box!
Volume	2.8–3.0 liters (the exact volume depends on the box model)	Always take with a reserve - for refilling

Original oil from Nissan for manual transmission Almera N16 — KE908-99932 (or its equivalent KE908-99931 for cold regions). But it is difficult to find on the open market, so high-quality analogues are often used:

• 🛢️ Mobil Mobilube 1 SHC 75W-90 - synthetics with excellent low-temperature properties.
• 🛢️ Castrol Syntrans Transaxle 75W-90 — suitable for boxes with synchronizers made of non-ferrous metals.
• 🛢️ Liqui Moly Hochleistungs-Getriebeoil 75W-90 — German quality, protects against wear under high loads.
• 🛢️ Motul Gear 300 75W-90 — a universal option for most manual transmissions.

⚠️ Attention: Never use oils with grade GL-5 for boxes where required GL-4! GL-5 contains aggressive additives that destroy synchronizers made of copper and brass. Exception: boxes marked FS5R31A (check by VIN code).

Tools and materials for oil change

To change the oil in a manual transmission yourself Nissan Almera N16 you will need:

Pit, overpass or lift (required!)

Set of sockets and 24 mm wrench (for drain plug)

10mm hex (for filler plug on some boxes)

Funnel with flexible hose (diameter 8–10 mm)

Oil drain container (volume of at least 4 liters)

New oil (3 liters with reserve)

Drain plug gasket (copper ring or rubber washer)

Rags, gloves, flashlight

Torque wrench (optional, for precise tightening)

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If you have a box with a probe (for example, FS5R31A), the process is simplified - filling occurs through the top hole. In boxes without probe (RS5F31V) oil is poured through the side hole, which requires skill or a special syringe.

Pay special attention drain plug gasket. B Almera N16 A copper O-ring is often used (part no. 11026-01M02), which deforms when tightened. Reusing an old gasket will cause leaks! If you can't find the original, a universal ring will do. M12×1,5.

Where can I buy a tool cheaper?

Many car owners overpay for tools in auto parts stores. Alternative options:

- Avito/Yula - often sell used heads and keys in good condition for 30–50% of the price of new ones.

- AliExpress - cheap but high-quality hexagons and funnels (delivery 2-3 weeks).

- Leroy Merlin — sometimes there are torque wrenches on sale.

- Tool rental — in some cities you can rent a pit or lift by the hour.

Step-by-step instructions: draining old oil

Before starting work warm up the box — drive 5–10 km or let the engine idle for 10–15 minutes. Warm oil drains faster and carries more contaminants with it.

1. Place the car on a pit or overpass. Secure the wheels with chocks and apply the handbrake. If you are working on a lift, make sure the machine is securely secured.

2. Remove the crankcase protection (if there is one). On Almera N16 it is secured with 4–6 bolts under a 10 or 12 mm head.

3. Find the drain plug on the box. It is located at the bottom of the manual transmission, closer to the rear of the car. On some boxes, the plug is hidden under the drive shaft boot - you need to bend it back.

4. Place a container for drainage and unscrew the plug with a 24 mm wrench. Be careful - the oil will be hot! Let it drain completely (10-15 minutes).

5. Assess the condition of the oil and plug:

   • 🔍 If the oil is black with metal particles, the box is worn out and may need repairs.
   • 🔍 If the cork is covered with thick dirt, clean the thread with a metal brush.
   • 🔍 If there is a magnet on the plug, check the amount of shavings (a large amount indicates critical wear).

After draining the oil wipe the drain hole with a rag and make sure that the old gasket is not stuck to the box body. If the threads are damaged, repairs (cutting a new thread or installing an insert) will be required.

Filling with new oil: nuances for boxes with and without a dipstick

The filling process depends on the type of box. B Almera N16 Two manual transmission options were installed:

1. Box with probe (FS5R31A) — Filling through the top hole under the hood. The probe is located next to the battery, its handle is painted yellow or red.

2. Box without dipstick (RS5F31V) — filling through the side hole, closed with a hexagon plug. It is difficult to access and requires a flexible hose.

For boxes with probe:

1. Remove the dipstick and insert a funnel into the hole.
2. Pour oil in small portions (200–300 ml), checking the level with a dipstick.
3. The level should be between the marks MIN And MAX.
4. After filling, warm up the box (drive 5–10 km) and recheck the level.

For boxes without probe:

1. Unscrew the filler plug (10 mm hexagon).
2. Insert a flexible hose with a funnel into the hole. The hose must fit tightly to avoid leaks.
3. Add oil until it begins to flow out of the hole. This means that the level has reached normal.
4. Screw the plug with a new gasket. Tightening torque - 25–30 Nm.

Important point: after changing the oil first 100–200 km Avoid sudden starts and high loads on the box. This is necessary to distribute the oil evenly across all components.

Common mistakes and how to avoid them

Even experienced car owners sometimes make mistakes when changing the oil in a manual transmission. Here are the most common ones and ways to prevent them:

• 🚫 Wrong choice of oil - use GL-5 instead of GL-4 leads to corrosion of synchronizers. Always check the specification on the label.
• 🚫 Overfilling or underfilling oil:
  • Overfilling - Excessive pressure can push out the seals.
  • Underfilling means oil starvation and accelerated gear wear.
• 🚫 Using an old gasket - even if it “seems to be normal,” over time, rubber and copper lose their elasticity.
• 🚫 Tightening plugs without a torque wrench - overtightening leads to thread breakage, weak tightening leads to leakage.
• 🚫 Ignoring the magnetic plug — if you do not clean the magnet from chips, they will fall back into the oil.

Another common mistake is oil change without flushing in a heavily soiled box. If the old oil was black or contained a lot of chips, it is recommended:

1. Add flushing oil (for example, Liqui Moly Getriebe-Reiniger).
2. Drive 5–10 km without loading the box.
3. Drain the flush and add new oil.

⚠️ Attention: If, after changing the oil, noise appears in the gearbox or the gears begin to engage worse, it is possible that low-quality oil was poured in or its level is incorrect. Drain it immediately and repeat the procedure!

What to do if problems arise after changing the oil

Sometimes after changing the oil, owners Almera N16 encounter unexpected problems. Let's look at the most common of them and solutions:

Problem	Possible reason	Solution
Noise (howl, hum) in the box	The oil is too thick (for example, 85W-90 instead of 75W-90)	Drain the oil and refill with the correct one. If the noise remains, check the bearings.
Stiff gear shifting	Oil does not meet specification GL-4 or too viscous	Replace the oil with the recommended one. Check the linkage and drive cables.
Oil leaking from under the plug	Damaged gasket or loose tightening	Replace the gasket, tighten the plug to torque 25–30 Nm.
Burnt smell from oil	The box is overheating or the oil is of low quality	Check the oil level and replace it with synthetic oil. Diagnose the clutch.

If problems persist after another oil change, they may not be related to the transmission fluid. In this case it is required box diagnostics:

• 🔧 Check the condition of the synchronizers (crunching noise when switching).
• 🔧 Inspect the bearings of the primary and secondary shafts (howling in neutral).
• 🔧 Diagnose the clutch (slipping, jerking).

On Almera N16 With mileage over 150,000 km, a common problem is wear of the release bearing. Its hum can be confused with the noise of the box, so for an accurate diagnosis it is better to contact a specialist.

FAQ: Frequently asked questions about changing the oil in the Almera N16 manual transmission

Is it possible to mix different oils in a manual transmission?

Mix oils not recommended, especially if they are from different manufacturers or types (synthetics + semi-synthetics). As a last resort, you can add oil of the same brand and specification (GL-4 75W-90), but perform a complete replacement as soon as possible.

How much oil is needed for a complete change?

In manual transmission Almera N16 fits 2.8–3.0 liters oils The exact volume depends on the box model:

• RS5F31V - 2.8 l.
• FS5R31A — 3.0 l.

Buy 3–3.5 liters so that you have enough to top up if necessary.

How to check the oil level in a box without a dipstick?

In boxes without probe (RS5F31V) the level is checked through the filler hole:

1. Place the car on a level surface.
2. Unscrew the filler plug (10 mm hexagon).
3. The level is correct when oil begins to flow out of the hole.
4. If the oil does not flow, add until a leak appears.

Carry out the check on a warm box (after 10 km of driving).

What happens if you don’t change the oil in your manual transmission?

The consequences depend on the mileage and operating conditions:

• 🔴 50,000–100,000 km: Deterioration of gear shifting, increased noise.
• 🔴 100,000–150,000 km: Wear of synchronizers, crunching noise when turning on gears.
• 🔴 150,000+ km: Destruction of bearings, jamming of shafts, need for major repairs.

The cost of manual transmission repair is 5–10 times higher than the price of an oil change, so the savings here are unjustified.

Is it possible to fill oil through the breather?

Technically you can, but not recommended. The breather (breathing valve) is located high, and filling through it does not allow you to control the level. In addition, there is a risk of dirt getting into the box. Use this method only as a last resort if you do not have access to the fill plug or dipstick.