Replacing coolant is a critical process for maintaining the performance of the model's power units Nissan Qashqai. Over time, antifreeze loses its thermal properties, which can lead to overheating of the engine or corrosion of the radiator channels. Many owners are faced with the need to carry out this procedure themselves in order to save money on service.
The procedure for draining the fluid has its own characteristics depending on the generation of the car and the type of engine installed. Owners Nissan Qashqai with motors H4M or MR20 Particular care should be taken when working with plastic pipes and drain plugs, as they are brittle at low temperatures.
Preparing the workplace and necessary tools
Before you begin to physically interfere with the cooling system, you need to properly organize the space. You will need a level area with good lighting, a hole or a lift, as access to drain plugs is often limited. It is also extremely important to have a measuring container to collect waste fluid to avoid environmental pollution.
The range of tools for this work is standard, but the presence of specific keys will speed up the process. You will need a set of spanners, a flat head screwdriver to loosen the clamps, a funnel, and a rag to clean up spills. Be sure to prepare gloves and goggles, as antifreeze is toxic and caustic.
- 🔧 Set of open-end and spanner wrenches (sizes 8, 10, 12, 14)
- 🧪 Container for draining at least 5 liters with a narrow neck
- 🧤 Protective gloves and goggles to protect skin and eyes from splashes
- 🧽 Rags and sponges for cleaning up spilled liquids
⚠️ Attention: Never open the expansion tank or radiator on a hot engine! The pressure in the system can reach critical values, which will lead to burns from steam and boiling liquid. Wait until the motor cools down completely.
Particular attention should be paid to safety when working with the engine. If the car has been driven recently, let it sit for at least 30-40 minutes. This will not only reduce the risk of injury, but will also allow fluid to drain to the bottom of the system, allowing for a more complete drain.
Step-by-step procedure for draining old coolant
Start the process by unscrewing the expansion tank cap. This action is necessary to depressurize the system and accelerate the flow of liquid. Unscrew the plug carefully, perhaps hearing a characteristic hissing sound of residual pressure, even if the engine has cooled.
Next, move to the main drain hole. On most modifications Nissan Qashqai The radiator drain plug is located at the bottom of the radiator. You will need to look under the car and may need to remove the plastic underbody protection. The plug may be made of plastic, so you should not use excessive force when unscrewing it.
After unscrewing the plug, the liquid will begin to flow out. Place a previously prepared container so that the liquid flows directly into it. If the flow is weak, you can gently rock the car or apply light pressure to the upper radiator hoses, but do not overdo it to avoid damaging them.
- 🔽 Unscrew the cap of the expansion tank to relieve pressure
- 🔍 Find the radiator drain plug at the bottom (sometimes covered with a guard)
- 🛢️ Place the container and open the drain hole
- 🌊 Let the liquid drain completely for 10-15 minutes
☑️ Checklist before starting the drain
Sometimes it is necessary to bleed the system to completely remove old fluid. To do this, you can run the engine for a couple of minutes without the reservoir cap, but only if you are sure that the fluid level allows this to be done without overheating. This will help displace air and remnants of the old composition.
What to do if the radiator cap is broken?
If you tear off the plastic radiator cap, do not try to screw it back in. You will have to buy a new radiator or use special repair inserts, but this is a complex procedure that requires removing the radiator.
Features of engines and access to drain points
The design of the cooling system varies depending on the engine size. On motors 1.6 H4M The radiator drain plug is often located in a hard-to-reach place, closer to the engine rather than to the body. On versions with engine 2.0 MR20 access may be somewhat freer, but still requires caution.
On some models Nissan Qashqai There is also a drain valve on the cylinder block. This hole allows you to remove the antifreeze located inside the motor itself, which significantly increases the efficiency of the replacement procedure. If you want the best possible replacement, use both drain holes.
| Engine type | Radiator drain plug location | Block drain valve | System volume (l) |
|---|---|---|---|
| 1.6 (H4M) | Lower left part of the radiator | Yes | ~6.5 |
| 2.0 (MR20) | Bottom center part | Yes | ~7.2 |
| 1.5 dCi (K9K) | Bottom side of radiator | Missing | ~5.8 |
When replacing antifreeze on a diesel engine, it is recommended to flush the system with distilled water to remove any remaining oil or scale, if present.
- 1.6 l
- 2.0 l
- 1.5 diesel
- Other
Flushing the cooling system before filling
After completely draining the old antifreeze, it is not recommended to immediately fill in new fluid. The system may contain sediment, rust, or additive degradation products. Flushing with distilled water will help remove these contaminants and extend the life of the new coolant.
The flushing process is simple: pour distilled water into the system, close the lid and start the engine for 10-15 minutes. Let it idle so that the water flows through all channels. After this, turn off the engine, let it cool a little and drain the water through the same holes.
- 💧 Use distilled water instead of antifreeze
- ⏱️ Let the engine run for 10-15 minutes
- 🚿 Drain the water and check its cleanliness
- 🔄 Repeat the procedure if heavily soiled
⚠️ Attention: Use only distilled water! Tap water contains salts and impurities that can cause scale and corrosion inside the radiator and cylinder block.
If the water remains cloudy or has a rusty tint after draining, the washing procedure should be repeated. Only when the drained water becomes clear can you proceed to the final stage - pouring new antifreeze. Ignoring this step may negate the benefits of fresh coolant.
Flushing the system with water is a mandatory step, which ensures that new additives in antifreeze do not react with the remnants of the old composition and dirt.
Choosing the right antifreeze for Nissan Qashqai
Manufacturer Nissan recommends using original fluid Long Life Coolant, which has a specific pink or red color. This is not a marketing ploy, but a technological feature: the composition of the additives in this liquid is designed specifically for aluminum radiators and copper heat exchangers used in Japanese cars.
Analogues can be used, but they must comply with the standard Nissan K2100 or have clearance GL-4 / GL-5 (depending on the year of manufacture). It is strictly forbidden to mix antifreezes of different colors and types, for example, hybrid (G11) and carboxylate (G12). This will cause sediment to form and clog the system.
When purchasing, pay attention to the concentration of additives. For climates with low temperatures (up to -35°C), it is better to choose a concentrate and dilute it with distilled water in a 1:1 ratio. Ready-made solutions often have a fixed frost resistance, which may not be enough for harsh winters.
Keep the receipt and label from the antifreeze you purchased. In the event of problems with the cooling system, the dealer or service may require confirmation that the correct fluid was used.
Filling with new fluid and removing air pockets
Filling antifreeze must be done through the neck of the expansion tank. Use a funnel to avoid spilling liquid on the engine. Fill slowly so as not to create new air pockets. The level must reach the mark MAX on a cold engine.
Removing air pockets is the most crucial moment. After filling, remove the upper radiator hose (if possible) or leave the expansion tank cap open. Start the engine and let it warm up until the fan turns on. As the fluid warms up, the fluid level will drop and must be constantly topped up.
- 🌡️ Warm up the engine to operating temperature
- 💨 Lightly press the nozzles to expel the air
- 📉 Add liquid as it decreases
- 🔒 Screw the cap tightly after cooling
It is important to monitor the temperature readings on your dashboard. If the needle rises above normal, turn off the engine immediately. This may mean that there is an air lock in the system that is interfering with circulation. Repeat the pumping procedure until the temperature stabilizes.
How to check for an air lock?
If the heater is blowing cold air and the engine is hot, there is air in the system. Try turning the steering wheel to extreme positions (on some models this helps to bleed the power steering and system) or warm up the engine with the reservoir cap open.
Common mistakes and precautions
One of the most common mistakes is using low-quality or counterfeit liquid. Cheap analogues often contain an incorrect set of additives that can corrode seals and gaskets. This will lead to leaks and subsequent expensive repairs.
Another common problem is improper disposal of old antifreeze. Never pour it down the drain or onto the ground. The chemical composition of ethylene glycol is toxic to animals and plants. Collect waste and hand it over to a specialized chemical waste collection point.
It is also worth remembering the timing of replacement. Even if you do not see external signs of wear, antifreeze loses its properties after 2-3 years. Regularly checking the density with a hydrometer will help identify the need for replacement in time.
⚠️ Attention: Ethylene glycol, which is part of most antifreeze, tastes sweet, which attracts animals. If you spill liquid on the ground, it can cause the death of your pets. Clean up any stains immediately.
Be extremely careful when working with plastic parts of the cooling system. Clamps and pipes for Nissan Qashqai Over time they become stiff and can crack if moved carelessly. If the clamp does not yield, it is better to replace it with a new one than to break the pipe.
The quality of antifreeze and the correct air removal procedure are two factors that guarantee a long life of the cooling system of your Nissan Qashqai without overheating and leaks.
FAQ: Frequently asked questions
How much antifreeze is needed for a complete replacement on Nissan Qashqai 1.6?
To completely replace the cooling system on a 1.6 H4M engine, approximately 6.5 liters of fluid will be required. It is recommended to buy a 7 or 8 liter canister so that there is a reserve for refilling and rinsing.
Is it possible to mix red and green antifreeze?
Absolutely not. Different colors indicate different additive chemistries. Mixing will cause a chemical reaction, forming sludge and blocking the radiator passages, which may cause the engine to overheat.
How often do you need to change antifreeze on a Nissan Qashqai?
The manufacturer recommends replacement every 90,000 km or every 3 years, whichever comes first. However, in severe winter conditions or frequent loads, it is better to check the condition of the fluid annually.
What should I do if, after replacing the antifreeze, the heater blows cold?
This is a sign of an air lock in the system. You need to warm up the engine until the fan turns on, opening the expansion tank cap, and periodically add fluid until the level stops dropping and air comes out.
Is it possible to add water to antifreeze in the summer?
In an emergency, you can add distilled water to get to the service. But after this, it is necessary to check the density of the solution and, if necessary, replace the antifreeze, since water reduces the boiling point and protection against corrosion.