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

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 heater does not blow cold air. Meanwhile, the coolant loses its properties after 3-5 years (or 60-90 thousand kilometers), and its timely replacement prevents corrosion of the radiator, destruction of the pump and jamming of the thermostat.

In this article you will find step-by-step instructions for replacing antifreeze on Almera G15 (2012-2018), including selecting a suitable fluid, draining the old one, flushing the system and filling in a new one. We took into account all the nuances: from the location of the drain plugs to the features of bleeding the system after replacement. And to avoid common mistakes, we added warnings And useful tips from service station masters.

When and why to change antifreeze on Nissan Almera G15

The manufacturer recommends replacing the coolant with Almera G15 every 90,000 km or once every 5 years (whichever comes first). However, in Russian realities this interval should be reduced to 60,000 km or 3 years - due to the aggressive climate, poor quality of roads and frequent temperature changes.

Signs that it’s time to change the antifreeze:

• 🔥 Engine overheating — the temperature arrow on the dashboard rises above normal (especially in traffic jams).
• 🚗 Cold air from the stove when the engine is running - a signal about an air lock or fluid degradation.
• 🟢 Antifreeze color change - if it becomes rusty, cloudy or has flakes, replacement is urgently required.
• 💧 Leaks or level decrease in the expansion tank (in the absence of visible leaks).

Ignoring these symptoms leads to corrosion of aluminum parts (radiator, block head), destruction of rubber pipes And engine overheating, which is fraught with major repairs. For example, a stuck thermostat due to deposits in the system will cost 5-7 thousand rubles, and replacing a radiator will cost 15-20 thousand rubles.

⚠️ Attention: If there is antifreeze in the expansion tank Almera G15 turned brown or black - this is a sign of mixing different types of liquids or using a counterfeit. In this case it is required complete flushing of the system special compounds, and not just a replacement.

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

From factory to Nissan Almera G15 is poured green antifreeze ethylene glycol based, meets specification Nissan Coolant L250 (catalog number KE902-99932). This liquid belongs to the class G11 (hybrid technology) and contains silicates to protect aluminum parts.

When replacing, you can use the original fluid or analogues from trusted brands:

Manufacturer	Title	Article	Color	Compatibility
Nissan	Coolant L250 Premix	KE902-99932	Green	100% original
AWM	Coolant G11	G11201	Green	Complete analogue
CoolStream	Premium G11	CS010101	Green	Recommended for Nissan
Sintec	Antifreeze G11	SINTEC-011	Green	Budget option
Motul	Inugel Optimal	105770	Yellow	Nissan approval

Important: Antifreezes of different colors and types cannot be mixed (eg G11 with G12). If you do not know what was uploaded earlier, it is better to do complete flushing of the system before replacement. Also avoid cheap fluids from unknown brands - they may contain aggressive additives that destroy rubber pipes.

Preparing for replacement: tools and consumables

To replace antifreeze yourself with Almera G15 you will need:

• 🔧 Tools:
  • Key on 10 mm (for radiator drain plug).
  • Head on 14 mm (for cylinder block plug).
  • A screwdriver with a Phillips bit (for removing the engine protection, if equipped).
  • Pliers (for loosening pipe clamps).
• 🛢️ Consumables:
  • Antifreeze - 5-6 liters (the system holds ~5.5 l).
  • Distilled water - 10 l (for washing).
  • New pipe clamps (2-3 pieces, if the old ones are rusty).
  • Rags and gloves.
• 🚗 Additionally:
  • A container for draining old antifreeze (at least 6 liters in volume).
  • Funnel for filling.
  • Cooling system flushing agent (e.g. LAVR Radiator Flush Classic).

Before starting work, make sure that the engine completely cooled down — antifreeze heats up to 90-100°C and can cause burns. Also prepare the place: it is better to work on flat surface (overpass or pit), since the radiator drain plug is located in the lower part.

⚠️ Attention: On Almera G15 with engine HR16DE The cylinder block drain plug is located behind the starter — to get to it, you may need to remove the crankcase protection or partially dismantle the starter (on some modifications). If you have little experience, it is better to drain the antifreeze only through the radiator and flush the system under pressure.

Step-by-step instructions: draining old antifreeze

The process of draining antifreeze onto Almera G15 consists of several stages. Follow the instructions so as not to miss important details:

1. Removing the engine protection (if equipped). On some versions Almera G15 plastic or metal protection is installed. It needs to be dismantled by unscrewing 4-6 bolts with a key 10 mm.

2. Draining antifreeze from the radiator.

   • Place a container under the radiator.
   • Unscrew drain plug (plastic nut in the lower left corner of the radiator) counterclockwise. If the plug does not budge, gently help with pliers, but do not strip the thread.
   • Wait until the antifreeze has completely drained (about 3-4 liters).

3. Draining antifreeze from the cylinder block.

   • Move the container under the engine block (transmission side).
   • Unscrew copper plug key on 14 mm (located below the intake manifold).
   • Be careful - antifreeze is pouring out of this hole under pressure!

Removing residue from the expansion tank. Disconnect the lower reservoir pipe and drain the remaining liquid.

After draining, tighten both plugs (radiator and block) and check them for damage. If the rubber seals are worn, replace them. Also inspect the pipes for cracks or softening (especially the lower radiator pipe - it most often leaks).

The drain plugs are tightened tightly, without distortion |

The pipes have no cracks or leaks|

The container with the old antifreeze has been disposed of (do not pour it on the ground!)|

New liquid has been prepared for filling -->

Flushing the cooling system: when is it needed and how to do it

Flushing the cooling system Almera G15 mandatory in three cases:

1. If the drained antifreeze cloudy, with sediment or rust.
2. If you don't know what was uploaded earlier (for example, when buying a used car).
3. If planned change the type of antifreeze (for example from G11 to G12).

For rinsing use special compounds (For example, LAVR Radiator Flush Classic or Liqui Moly Kuhler-Reiniger) or distilled water (less effective, but safe). Washing algorithm:

1. Tighten the drain plugs and fill the flushing liquid (diluted according to the instructions) or distilled water into the expansion tank to the mark MAX.

2. Start the engine and let it run 10-15 minutes at idle speed (before the thermostat opens).

3. Drain the flushing fluid through the radiator and cylinder block.

4. Repeat the procedure with distilled water 2-3 timesuntil the water becomes clear.

If the system is heavily contaminated (for example, after using sealant or low-quality antifreeze), it may be necessary to disassembly and mechanical cleaning of the radiator. In this case, it is better to contact a service station.

What happens if you don't flush the system?

Without flushing, old antifreeze residues and deposits will reduce the effectiveness of the new fluid by 30-40%. This will lead to:

- Accelerated corrosion of aluminum parts (radiator, cylinder head).

- Clogged cooling channels and engine overheating (especially in traffic jams).

- Reduced service life of the pump and thermostat.

In the worst case - to engine overheating and deformation of the block head (repairs will cost 50+ thousand rubles).

Filling with new antifreeze and bleeding the system

Now we move on to pouring fresh antifreeze. It is important here to avoid air jamswhich lead to overheating or cold stove. Follow the instructions:

1. Preparation. Make sure all drain plugs are tightened, pipes are connected, and clamps are tightened. If you use a concentrate, dilute it with distilled water in the proportion 1:1 (for Almera G15 A 50/50 ratio is suitable, withstanding frosts down to -37°C).

2. Filling.

   • Remove the expansion tank cap and begin pouring antifreeze through the funnel.
   • Fill in slowlyto avoid the formation of bubbles.
   • When the liquid reaches the mark MAX, close the reservoir and start the engine.

3. Leveling up.

   • Let the engine run 3-5 minutes at idle speed with the heater on at maximum temperature.
   • Monitor the antifreeze level in the tank - it may drop (add as needed).
   • After 5 minutes, turn off the engine and check the level. If necessary, top up to MAX.

A critical nuance for Almera G15: after replacing the antifreeze, be sure to check the operation of the cooling fan. It should turn on when the engine warms up to 95-100°C. If the fan does not work, there is an air lock in the system or the temperature sensor is faulty.

Common mistakes and how to avoid them

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

• 🔧 Wrong choice of antifreeze. Use of fluid class G12 or G12+ instead of recommended G11 may lead to corrosion of aluminum parts. Always check the specification Nissan Coolant L250.
• 💧 Incomplete drainage of old antifreeze. If you do not drain the fluid from the cylinder block, the residue will mix with the new one, reducing its properties. Always drain antifreeze from two points: radiator and block.
• 🚗 Ignoring flushing. If the system is contaminated, the new antifreeze will quickly lose its properties. Flush the system with at least distilled water.
• 🔥 They forget to bleed the system. Air pockets lead to overheating or cold stove. Always warm up the engine with the heater on after replacement.

Another common mistake is pulling drain plugs. The plastic radiator cap breaks easily, and the copper block cap can strip the threads. Twist them tightly no more than 10-15 Nm (by hand, without fanaticism).

⚠️ Attention: If, after replacing the antifreeze, the engine begins to overheat and the heater blows cold air, there is still some in the system. air lock. To fix it:

1. Stop the engine and let it cool.
2. Remove the upper radiator hose and add antifreeze to the top.
3. Screw on the reservoir cap and start the engine again, squeezing the pipes to squeeze out the air.

FAQ: Frequently asked questions about replacing antifreeze on Almera G15

Is it possible to mix antifreeze of different colors?

No, you absolutely cannot mix antifreezes of different colors and types (for example, G11 and G12). This leads to the formation of sediment, which clogs the channels of the cooling system. If you don't know what was uploaded earlier, do complete flushing distilled water or a special composition.

How much antifreeze is needed for a complete replacement?

To the cooling system Nissan Almera G15 fits 5.5 liters antifreeze. However, when replacing without flushing, it takes about 4-4.5 liters (some remains in the cylinder block). For washing, you will additionally need 10-15 liters of distilled water.

How often should you check the antifreeze level?

Antifreeze level in the expansion tank Almera G15 it is recommended to check every 1,000–2,000 km or before a long trip. Normal level is between the marks MIN And MAX on a cold engine. If the level drops more often, look for leaks (check the pipes, radiator, pump and tank cap).

What should I do if the engine overheats after replacing the antifreeze?

There may be several reasons:

1. Air lock — bleed the system as described above.
2. Faulty thermostat — check whether it opens when warming up (the radiator pipe should heat up).
3. Clogged radiator — washing or replacement is required.
4. Wrong antifreeze - If the fluid used is not according to specifications, drain it and flush the system.

Is it possible to use water instead of antifreeze in the summer?

For a short time (for 1-2 days) you can pour distilled water, but this is fraught:

• Corrosion of aluminum parts.
• Scale formation in the radiator.
• Engine overheating in traffic jams (water boils at 100°C, antifreeze at 110-120°C).

Long-term use of water instead of antifreeze prohibited - this will lead to expensive repairs.