Replacing antifreeze on a Nissan Almera G15: a complete guide with photos and videos

Replacing antifreeze in Nissan Almera G15 - a procedure that many owners put off until the last minute, until the engine begins to overheat or the stove stops heating. Meanwhile, the coolant loses its properties after 3-5 years (or 60-90 thousand km), and its degradation leads to corrosion of the radiator, pump and even the cylinder block. In this article we will look at how to change antifreeze yourself Almera G15 (including restyled versions 2016-2022), without contacting the service.

The peculiarity of this model is closed cooling system with vacuum valve in the expansion tank cap, which makes it difficult to completely drain the old fluid. We'll show you how to get around this limitation, select a compatible antifreeze, and tell you why. flushing the system - not always required. We’ll also look at typical mistakes that cause the smell of antifreeze to appear in the cabin after replacement or the pipe to start leaking.

When to change antifreeze on a Nissan Almera G15: signs and regulations

Official regulations Nissan requires replacement of antifreeze every 90,000 km or 6 years (whichever comes first). However, these terms are relevant for ideal operating conditions - moderate climate, original fluid and no leaks. In reality, there are many more reasons for early replacement:

• 🔥 Engine overheating — the temperature rises above 100°C even at idle.
• 🟠 Antifreeze color change — instead of green/blue it became rusty, cloudy or with flakes.
• 💧 Leaks — there are puddles of sweetish liquid under the car, the level in the tank drops faster than usual.
• ❄️ The stove blows cold — clogging of the heater radiator due to decomposed antifreeze.

On Almera G15 with motors HR16DE (1.6 l) and K4M (1.6 l, Renault) it is critical to monitor the condition of the coolant: the aluminum cylinder block of these engines is especially susceptible to corrosion when using low-quality or old antifreeze. If you bought a used car and don’t know when the last replacement is - pour some liquid into a transparent container and evaluate it visually. The presence of sediment or metal particles is a signal for urgent replacement.

What antifreeze to fill in Nissan Almera G15: original and analogues

From factory to Almera G15 is poured green antifreeze based on ethylene glycol with additive package Nissan Long Life Coolant (article KE902-99932). This fluid meets specification JIS K 2234 and is compatible with aluminum engine parts. However, original antifreeze is difficult to find in retail, so analogues are suitable:

Brand	Title	Article	Color	Compatibility
Nissan	Long Life Coolant (concentrate)	KE902-99932	Green	100% original
CoolStream	Premium	CS0102	Green	Analogue of the original
Sintec	Unlimited G12++	85060	Red	Tolerance VW TL 774-J
Motul	Inugel Optimal	105787	Yellow	For aluminum engines

⚠️ Attention: Never mix antifreeze of different colors or brands! Even if they are marketed as "universal", additives may react, resulting in gel formation or precipitation. If you don’t know what was uploaded earlier - flush the system before replacement.

For Almera G15 optimal choice - concentrate, which is diluted with distilled water in a 1:1 ratio (for climates with frosts down to -37°C). Ready-made liquids (for example, CoolStream A-110) are more convenient, but are more expensive and are often diluted with low-quality water.

Preparing for replacement: tools and safety precautions

To replace antifreeze with Nissan Almera G15 no lift or pit is needed - just a flat platform and a standard set of tools. Here's what you'll need:

• 🔧 Key for 10 - to remove engine protection (if any).
• 🔨 Head for 13 or 14 - for the radiator drain plug.
• 🧤 Rubber gloves — antifreeze is toxic and is absorbed through the skin.
• 📦 Capacity 8-10 liters - to drain old fluid.
• 💦 Distilled water — 5-10 liters for washing (if necessary).
• 🔄 Funnel - for carefully pouring new antifreeze.

⚠️ Attention: Operate only on a cold engine! Antifreeze in a hot system is under pressure and can escape in a stream of temperatures up to 100°C, causing burns. If the car is just turned off, wait minimum 2 hours.

Before starting work, open the hood and relieve pressure in the system by carefully turning the expansion tank cap counterclockwise (do not turn it completely!). If you hear hissing, wait until it stops. Also prepare a rag: antifreeze is aggressive to paintwork, and drops of it must be wiped off immediately.

Disconnect the negative terminal of the battery|Relieve the pressure in the cooling system|Prepare a container for draining|Wear gloves and safety glasses|Check for the presence of new antifreeze and distilled water-->

Step-by-step instructions: how to drain old antifreeze

Draining antifreeze onto Almera G15 has a nuance: There is no traditional drain plug on the radiator. Instead, you will have to disconnect the lower pipe. Here's how to do it right:

1. Remove the engine protection (if installed) by unscrewing the 4 bolts with a 10mm wrench.

2. Place a container under the radiator on the driver's side. There you will see thick black pipe (lower radiator hose), secured with a clamp.

3. Loosen the clamp with a screwdriver or pliers and pull the pipe off the radiator. Be prepared - the antifreeze will flow right away!

4. To drain fluid from the cylinder block, find drain bolt on the rear side of the engine (transmission side). It is located under the intake manifold and has a 13 or 14 head.

5. Unscrew the bolt and wait until the antifreeze stops dripping. Screw the bolt back firmly 20-25 Nm.

At this stage, about 4-5 liters liquid (from the total volume of the system 6.5-7 liters). The remainder will remain in the heater radiator and pipes. For a complete drain you can:

• 🔄 Blow out the system compressor through the expansion tank (pressure no more than 1 atm!).
• 🚗 Raise the rear of the car with a jack so that the liquid drains from the stove.

What to do if the drain bolt does not come off?

If the bolt is stuck, do not use excessive force - you risk stripping the thread. Treat it with WD-40 and wait 10-15 minutes. If this does not help, try heating the bolt with a hair dryer (do not overheat the plastic parts nearby!). As a last resort, contact the service department - tearing off the bolt “with meat” is dangerous for the cylinder block.

Flushing the cooling system: is it necessary?

Flushing is required in three cases:

1. If the drained antifreeze cloudy, flakes or rusty.
2. If you don't know what was uploaded earlier (for example, after buying a used car).
3. If you go to other type of antifreeze (for example, from antifreeze to G12++).

For rinsing use distilled water or special formulations (for example, Liqui Moly Kuhlerreiniger). Algorithm:

1. Close the drain holes and pour water/flush into the system through the expansion tank.
2. Start the engine and let it run 10-15 minutes at idle speed (before the thermostat opens).
3. Drain the liquid and repeat the procedure until the water runs clear.

⚠️ Attention: Do not use regular tap water for rinsing! Salts and impurities in it will settle on the walls of the radiator and impair heat transfer. Also avoid “folk” remedies like vinegar or citric acid - they can damage the rubber pipes.

Filling with new antifreeze: nuances for Almera G15

Before adding new antifreeze, make sure that:

• ✅ All drain plugs are tightened.
• ✅ The pipes are put on and secured with clamps.
• ✅ The expansion tank cap is clean and undamaged.

Filling instructions:

1. Using a funnel, slowly pour antifreeze into the expansion tank to the mark MAX.

2. Close the reservoir cap and start the engine. Let it idle until the cooling fan comes on (this means the thermostat has opened).

3. Turn off the engine and check the fluid level - it will drop as antifreeze fills the heater radiator. Top up to MAX.

4. Repeat the starting and topping procedure 2-3 timesto remove air pockets.

🔹 Important point: On Almera G15 Air locks often form in the cooling system. To avoid them, when filling antifreeze squeeze the upper radiator pipes with your hand - this will help the liquid to be evenly distributed. You can also raise the front of the car on a jack (at an angle of 15-20°) so that the air escapes through the expansion tank.

After replacement, check the operation of the system:

• 🔥 The engine temperature should stabilize at 90-95°C.
• ❄️ The stove should blow hot air in all modes.
• 💧 There should be no puddles or drops of antifreeze under the car.

Common mistakes and how to avoid them

Even experienced car owners make mistakes when replacing antifreeze with Almera G15. Here are the most common:

Error	Consequences	How to avoid
Failure to comply with the proportions when diluting the concentrate	Freezing of liquid in winter or overheating in summer	Use distilled water and measuring cup
Filling with antifreeze without removing air pockets	Engine overheating, poor heater performance	Warm up the engine with the reservoir cap open, compress the pipes
Using incompatible antifreeze	Corrosion of aluminum parts, leaks	Buy only approved liquids JIS K 2234
Underfilling or overfilling of antifreeze	Overheating or liquid squeezing out through the lid	Monitor the level using markers MIN/MAX

Another typical problem is leaking from under the expansion tank cap. This occurs due to wear of the sealing rubber or improper installation (misalignment, insufficient tightening force). If the cover is old, replace it (original article number 21450-4M000).

⚠️ Attention: If, after replacing the antifreeze, the engine begins to overheat and the heater blows cold, there is most likely air left in the system. Don't ignore it! Prolonged work with an air lock can lead to cylinder head deformation.

FAQ: Frequently asked questions about replacing antifreeze

Is it possible to mix antifreeze of different colors?

No, even if they are of the same class (for example, G12). Color is not an indicator of compatibility, but only a dye. When mixing different brands, additives may react, resulting in sedimentation or loss of fluid properties. If you need to top up, use only the same antifreeze, which is already filled, or flush the system.

How much antifreeze is needed for a complete replacement with Almera G15?

Total volume of the cooling system - 6.5-7 liters. However, when replacing it yourself without vacuum equipment, about 5-5.5 liters are drained. The residue remains in the cylinder block and heater radiator. For a complete replacement you will need 2 drain-fill cycles or washing.

How often should you check the antifreeze level?

Check the level in the expansion tank every month or before long trips. The optimal level is between the marks MIN And MAX on a cold engine. If antifreeze disappears faster than 100-200 ml in 6 months - look for leak (check the pipes, radiator, pump and tank cap).

What to do if after replacing the antifreeze quickly darkens?

Darkening of antifreeze after 100-200 km indicates heavily contaminated system (rust, old fluid residues, oil). Required:

1. Drain new antifreeze.
2. Flush the system special cleaner (For example, Wynn's Radiator Flush).
3. Refill with fresh antifreeze.

If the problem persists, check engine oil (perhaps antifreeze is mixed with it through a broken cylinder head gasket).

Is it possible to use antifreeze instead of antifreeze?

No, absolutely! Antifreeze is an outdated type of silicate-based antifreeze that is not suitable for modern engines, especially those with aluminum parts. B Almera G15 antifreeze will cause:

• Corrosion of the radiator and pump.
• Cooling system channels are clogged.
• Engine overheating due to deterioration of heat transfer.

Use only carboxylate antifreeze (G12, G12+ or G12++) with tolerance JIS K 2234.