Replacing antifreeze on a Nissan Primera P12: a complete guide with photos and videos

Replacing antifreeze in Nissan Primera P12 - 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 of operation, and in the Russian climate - even faster. If you notice that the antifreeze has become cloudy, has acquired a rusty tint, or sediment has appeared in the expansion tank, it’s time to act.

In this article you will find step-by-step instructions for replacing antifreeze on Primera P12 (including models with engines QR20DE And QR25DE), recommendations for choosing a liquid, as well as unique nuances that are not mentioned in standard manuals - for example, how to avoid air locks in a system without a vacuum pump. We will also look at why you can’t mix antifreezes of different colors and what to do if after replacement the stove stops heating.

When to change antifreeze in Nissan Primera P12

The manufacturer recommends replacing the coolant every 90,000 km or 5 years - whichever comes first. However, for Russian realities these terms should be reduced:

• 🔴 Every 3 years or 60,000 km - if you use regular ethylene glycol antifreeze (for example, Nissan Coolant L248 or analogues).
• 🟢 Every 5 years or 100,000 km - if long-lasting carboxylate antifreeze is poured (for example, CoolStream Premium or Sintec Unlimited G12++).
• ⚠️ Immediate replacement - if the liquid becomes cloudy, flakes appear, or sediment is visible in the tank (this is a sign of decomposition of additives).

Another key point - antifreeze color. B Primera P12 filled from the factory green or blue ethylene glycol based antifreeze (specification Nissan MES Z32). If you see that the liquid has turned brown or black, this is a signal of corrosion in the system. In such cases, not only replacement is required, but also flushing the radiator and engine block.

⚠️ Attention: If foam or oily stains appear in the expansion tank, this is a sign of oil getting into the cooling system. Possible causes: a broken cylinder head gasket or a crack in the block. In this case, replacing antifreeze will not help - engine diagnostics are needed.

What antifreeze to fill in Nissan Primera P12

Selecting coolant for Primera P12 - a critical stage. Using unsuitable antifreeze may result in corrosion of aluminum parts (radiator, pump, engine block) or blockage of canals due to incompatibility of additives.

Official recommendations Nissan:

• 🔹 Original antifreeze: Nissan Coolant L248 Premix (green, ready to pour) or Nissan Coolant L250 (concentrate).
• 🔹 Analogues: CoolStream A-110 (green), Sintec Unlimited G12++ (red, compatible with green), Felix Carbox G12+.
• 🔹 Specification: Must match Nissan MES Z32 or JIS K 2234.

Important: do not mix antifreeze of different colors and types! For example, green G11 and red G12++ have different additives, and mixing them may cause gelation or precipitation. If you don’t know what was uploaded earlier, it’s better completely drain the old fluid and flush the system.

Antifreeze type	Color	Service life	Compatible with Primera P12
Nissan Coolant L248	Green	3-5 years	✅ Perfect fit
CoolStream A-110	Green	3 years	✅ Complete analogue of the original
Sintec Unlimited G12++	Red	5 years	✅ Compatible with complete replacement
Felix Carbox G12+	Red/Purple	5 years	✅ Only after washing
Antifreeze A-40M	Blue	2 years	❌ Not recommended

⚠️ Attention: B Primera P12 with engines QR25DE (2.5 l) cooling system volume is 7.8 liters, and in models with QR20DE (2.0 l) - approx. 6.5 liters. Always buy extra antifreeze (minimum 8 liters), as some of the liquid will remain in the block and radiator.

Preparing to replace antifreeze: tools and safety precautions

Before you start replacing, prepare everything you need. It is more convenient to work on pit or overpass, but you can do without them if you carefully jack up the front of the car.

Required tools and materials:

• 🔧 Set of sockets and wrench 10 mm (for radiator drain plug).
• 🔧 Key on 14 mm (for the engine block drain plug).
• 🔧 Pliers (for removing pipe clamps).
• 🔧 Funnel and hose with a diameter of 10-12 mm (for pouring without splashing).
• 🧤 Gloves and rags (antifreeze is toxic!).
• 🚰 Drain container with a volume of at least 8 liters.
• 💧 Distilled water (10-15 liters for rinsing).

Security measures:

• ⚠️ Work only for cold engine — antifreeze in a hot system is under pressure and can burn!
• ⚠️ Avoid getting antifreeze on paint and plastic - it is aggressive and can damage the coating.
• ⚠️ After replacement, dispose of the old fluid correctly - Don't pour it down the drain! Hand over to collection points for waste technical fluids.

Purchase a supply of antifreeze (8+ liters)|Prepare tools and a container for draining|Make sure the engine is completely cool|Wear gloves and protect your eyes|Put the car on a flat surface-->

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

Draining antifreeze onto Nissan Primera P12 has its own nuances. Unlike many cars, there is two drain plugs: one on the radiator, the second on the engine block. If you do not drain the fluid from the block, there will be up to 1.5-2 liters old antifreeze, which will worsen the properties of the new fluid.

Procedure:

1. Remove the expansion tank cap. This will relieve pressure in the system and speed up draining.
2. Place a container under the radiator. The radiator drain plug is located in the lower left corner (in the direction of travel). It is plastic and can be unscrewed by hand or with pliers.
3. Unscrew the radiator cap. The liquid will begin to flow out - wait until the flow weakens.
4. Move the container under the engine. The drain plug of the unit is located at the rear, on the gearbox side. It is metal and can be unscrewed with a key. 14 mm.
5. Unscrew the block plug. Be careful - antifreeze can flow out of this hole under pressure!
6. Remove the lower radiator hose. This will help drain any remaining liquid. The pipe is secured with a clamp - loosen it with pliers and remove the hose.

After draining, don't forget wipe plugs and pipes from antifreeze residues. If the block drain plug has a damaged thread or O-ring, replace it (part number of the original plug: 21097-4M000).

What to do if the drain plug of the block does not unscrew?

If the plug is stuck, do not use excessive force - you may break the thread. Try:

1. Treat the plug with WD-40 and wait 10-15 minutes.

2. Gently tap the cork with a hammer through a wooden spacer.

3. Heat the area around the plug with a hair dryer (do not overheat!).

If all else fails, you will have to drain the antifreeze only through the radiator and pipes, but up to 2 liters of old fluid will remain in the system.

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

Flushing the cooling system Primera P12 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, bought a used car).
3. If you change the type of antifreeze (for example, from green G11 to red G12++).

How to flush the system:

1. Close the drain plugs and upload it to the system distilled water (or special washing, for example, LAVR Radiator Flush Classic).
2. Start the engine and let him work 10-15 minutes at idle speed (before the thermostat opens).
3. Drain the water through the radiator and block plugs. Repeat the procedure until the drained fluid is clear.
4. For deep cleaning can be used citric acid (100 g per 5 liters of water) or vinegar (0.5 l per 10 liters). After such flushing, be sure to rinse the system with clean water!

⚠️ Attention: Never use for rinsing regular tap water - it contains salts and impurities that can settle in the radiator and engine channels. Only distilled water!

Filling with new antifreeze: how to avoid air locks

Pouring antifreeze into Primera P12 - the most critical stage. The main problem that owners face is formation of air jams. They lead to overheating of the engine or poor performance of the stove. To avoid this, follow our instructions:

Filling order:

1. Close all drain plugs and connect the pipes.
2. Pour antifreeze into the expansion tank to the mark MAX. Use a funnel to avoid spillage.
3. Open the stove tap to maximum (set the interior temperature regulator to HOT).
4. Start the engine and let it idle.
5. Check the level in the tank — it will fall as the system fills. Add antifreeze until the level stabilizes.
6. Warm up the engine to operating temperature (cooling fan will turn on). After this, turn off the engine and check the level again.

How to remove an air lock if it has formed:

• 🔧 Method 1: Remove the upper radiator pipe (the one that goes to the expansion tank) and add antifreeze until bubble-free liquid comes out of the pipe.
• 🔧 Method 2: Place the car on a slope (front up) and with the reservoir cap open, let the engine run for 5-10 minutes.
• 🔧 Method 3: Use vacuum pump to bleed the system (if you have access to such equipment).

Checking the system after replacing antifreeze

After replacing the antifreeze, you need to make sure that the system is working correctly. Here's what to check:

• 🔍 Antifreeze level in the expansion tank (must be between MIN And MAX on a hot engine).
• 🔍 Stove operation — if cold air blows, it means there is air left in the system or the thermostat is faulty.
• 🔍 Engine temperature - after replacing antifreeze it should not exceed 90-95°C in normal mode.
• 🔍 No leaks — inspect the pipes, radiator and drain plugs for leaks.

If, after replacing the antifreeze, the engine begins to overheat or the heater does not heat up, possible reasons:

• ❌ Air lock - see section above.
• ❌ Faulty thermostat — if the lower radiator hose remains cold, the thermostat is stuck in the closed position.
• ❌ Clogged radiator — if flushing does not help, the radiator may need to be replaced.
• ❌ Wrong antifreeze - some cheap liquids can foam when heated.

⚠️ Attention: In the first 1-2 weeks after replacing antifreeze monitor its level daily. The system may “squeeze out” air and the level will drop. Add fluid as needed.

Common mistakes when replacing antifreeze on a Nissan Primera P12

Even experienced car owners sometimes make mistakes when replacing antifreeze. Here are the most common of them:

• ❌ Mixing different types of antifreeze. For example, adding green G11 in red G12++ can lead to the formation of flakes and blockage of the channels.
• ❌ Ignoring the engine block drain plug. As a result, up to 2 liters of old antifreeze remains in the system, which shortens the service life of the new fluid.
• ❌ Use tap water for rinsing. This leads to scale formation in the radiator and block.
• ❌ Antifreeze overflow above the MAX mark. When heated, the liquid expands and excess can be squeezed out through the reservoir cap.
• ❌ Incorrect tightening of pipe clamps. Weak tightening leads to leaks, and excessive tightening leads to damage to the pipes.

Another common mistake is replacing antifreeze without checking the condition of the expansion tank and cap. Over time, the plastic of the tank becomes brittle, and the lid valve no longer holds pressure. If, after replacement, the antifreeze begins to “leave” without visible leaks, first check the tank for cracks and replace the cap (original part number: 21450-4M000).

FAQ: Frequently asked questions about replacing antifreeze on Primera P12

Is it possible to fill the Primera P12 with a different color of antifreeze, for example, red instead of green?

It is possible, but only on condition complete fluid change with flushing. Red antifreeze (G12++) are compatible with green (G11), but they cannot be mixed. If you decide to switch to a different type, first flush the system with distilled water.

How much antifreeze is needed for a complete replacement in Primera P12 2.0 (QR20DE)?

Cooling system volume for QR20DE — 6.5 liters. However, when replacing, some of the fluid remains in the block, so buy 8 liters (or 2 canisters of 5 liters each, if you take concentrate).

What should I do if, after replacing the antifreeze, the stove blows cold air?

Most likely there is air left in the system. Try:

1. Warm up the engine to operating temperature with the reservoir cap open.
2. Press sharply on the lower radiator hose several times (this will help expel the air).
3. If it doesn’t help, remove the pipe from the throttle body and add antifreeze until the liquid comes out without bubbles.

If the stove does not heat even after this, check the thermostat or heater radiator for clogs.

How often should you check the antifreeze level after replacing?

In the first days after replacement, check the level daily (in the morning on a cold engine). After a week, you can switch to weekly monitoring. Normal level is between MIN And MAX to cold.

Is it possible to use antifreeze instead of antifreeze?

Technically possible, but not recommended. Antifreeze (for example, A-40M) has a lower boiling point (110°C against 130°C with high-quality antifreeze) and lasts less (up to 2 years). In addition, it protects aluminum parts less well from corrosion.