The cooling system is a critical component of any vehicle, ensuring that the engine maintains optimal temperature under various operating conditions. For owners Nissan Note Regular replacement of coolant is not just a recommendation from the manual, but a necessity that prolongs the life of the engine and radiator.
Improper replacement or use of incompatible types of refrigerant can lead to corrosion of the channels, the formation of deposits and, as a result, overheating of the power unit. It is important for owners to understand the difference between organic and inorganic antifreeze so as not to harm the system.
In this article we will analyze in detail all stages of the procedure: from choosing the right product to releasing air locks. You will learn what tools are needed, how to properly drain the waste, and what to do if the fluid level drops after servicing.
Choosing the right antifreeze for Nissan Note
The first and most important step in preparation is selecting the appropriate coolant. Manufacturing plant Nissan recommends using original series antifreeze Long Life Coolant (LLC), which has a specific color and chemical composition, adapted for aluminum radiators and pumps.
There are many analogues on the market, but not all of them are suitable for Japanese cars. Using cheap nitrate or phosphate based mixtures can cause rapid corrosion within the system, leading to costly repairs. Always check the tolerances on the canister before purchasing.
The main characteristics to pay attention to are the freezing point and the type of corrosion inhibitors. For our climatic conditions, the optimal choice would be a liquid with a freezing temperature -40°C or -45°C.
- 🔹 Original Nissan Long Life Coolant — perfect compliance with plant specifications, guaranteeing no reactions with system materials.
- 🔹 G12+ (Organic) - a valid alternative if the original is not available, but requires careful checking of compatibility.
- 🔹 G13 (Hybrid) — modern solutions based on glycerin, safe for plastic and rubber.
⚠️ Attention: It is strictly forbidden to mix antifreeze of different colors and chemical compositions. This can lead to sediment, which will clog the thin radiator passages and wear out the pump seal.
If you do not know what type was previously filled, it is best to completely flush the system with distilled water before adding a new compound. This ensures that there are no chemical conflicts.
- Original Nissan
- G12+ (Organic)
- G13 (Hybrid)
- I don't know, haven't checked
Preparatory stage and necessary tools
Before starting work, it is necessary to ensure safety and prepare the workplace. The engine must be completely cool, as working with the system under pressure on a hot engine can cause severe burns.
You will need a set of tools that most car owners have in their garage. Pay special attention to the container for draining the waste liquid; it should have a capacity of at least 5-6 liters, since the volume of the cooling system Nissan Note is about 5.5 liters.
To access the radiator drain plug, it is sometimes necessary to remove the protective fender liner or dismantle the engine splash guard. This is inconvenient, but necessary for quality drainage.
☑️ List of required tools
Also prepare distilled water if you plan to flush the system. Regular tap water contains salts that will cause scale and accelerate corrosion.
- 🔹 Keys and sockets - to remove the protection and unscrew the drain plug (often a 10 or 12 size ratchet is required).
- 🔹 Hose and funnel — for carefully filling new fluid without spilling on the engine.
- 🔹 Cleaner - to remove traces of old oil or dirt from the reservoir caps.
Before starting work, be sure to place the car on a level surface and secure it with the handbrake. Make sure the radiator fan has stopped and the engine has cooled down to no more than 40 degrees.
Procedure for draining old coolant
Draining old antifreeze is a process that requires care and patience. Open the hood and find the expansion tank. Carefully, turning slightly, unscrew the reservoir cap to release any residual pressure in the system.
Move under the car. Locate the drain plug on the lower radiator hose or directly on the radiator housing. Place the prepared container and slowly unscrew the cap.
The liquid will flow out in a thin stream, sometimes intermittently. Take your time, let the system empty completely. If the plug is rusty, use penetrating lubricant, but be careful not to get it into the radiator.
After the main flow stops, unscrew the cap of the expansion tank completely. This will speed up the draining process by introducing air. It is also recommended to unscrew the lower radiator hose if access to the drain plug is difficult.
What to do if the plug does not unscrew?
Do not use excessive force to avoid stripping the threads. Use WD-40 or similar and let it sit for 10-15 minutes. If the plug is plastic, proceed with extreme caution as it may burst from overexertion. As a last resort, you can disconnect the lower radiator hose.
Flushing the cooling system
If you change antifreeze regularly, flushing may not be necessary, but it is highly advisable to remove deposits and micro-rust particles. To do this, use distilled water or special rinsing compounds.
Fill the expansion tank with distilled water to the maximum, close the lid and start the engine. Let it idle until the fan turns on or reaches operating temperature. This will allow water to circulate throughout the system.
Once cooled, drain the water again. If the drained water is cloudy or has a red tint, the washing procedure should be repeated until the liquid becomes clear.
⚠️ Attention: Never use regular tap water to flush the cooling system. Hard water will leave a limescale deposit, which will reduce the radiator's heat output and can cause the engine to overheat.
Particularly thorough flushing is required if low-quality antifreeze was previously poured into the system or if incompatible liquids were mixed.
Complete flushing of the system with distilled water is a guarantee that the new antifreeze will not react with the remnants of the old one, which will ensure its maximum service life.
Filling with new antifreeze and removing air pockets
This is the most critical stage on which the efficiency of the system depends. Close the radiator drain plug and the lower pipe (if unscrewed). Start pouring new antifreeze through the expansion tank.
Pour in the liquid slowly so that it has time to fill the cavities of the system. Use a funnel to avoid spills on the motor and wires. Fill until the level reaches the mark MAX on the tank.
For removing air pockets on many engines Nissan a special fitting is provided. If it is not there, it is necessary to create circulation. Open the reservoir cap, start the engine and let it warm up.
During the warming up process, the fluid level will drop as air leaves the system. Add antifreeze as needed, keeping the level between MIN and MAX.
- 🔹 Temperature control — carefully monitor the temperature arrow on the instrument panel. If it rises sharply, stop immediately and check for air.
- 🔹 Fan operation — after turning on the fan, let the engine run for a couple more minutes, then turn it off and let it cool.
- 🔹 Final check — after cooling, add antifreeze to the required level and close the lid.
How to check that there is no air?
After several warm-up and cool-down cycles, check the upper and lower radiator hoses. They should be equally hot. If the top one is hot and the bottom one is cold, there is air left in the system or the thermostat is faulty.
Table of volumes and specifications for different generations
Owners of various modifications Nissan Note may have different volumes of the cooling system depending on the type of engine (petrol or diesel) and year of manufacture. The table below will help you accurately calculate the amount of material needed.
| Engine model | Years of manufacture | System volume (liters) | Recommended type |
|---|---|---|---|
| HR12DE (1.2 l) | 2005–2013 | 5.1 | Nissan Long Life Coolant |
| HR15DE (1.5 l) | 2005–2013 | 5.3 | Nissan Long Life Coolant |
| K9K (1.5 dCi) | 2005–2013 | 5.8 | Nissan Long Life Coolant |
| HR12DDT (1.2 DIG-T) | 2013–2019 | 5.5 | Nissan Long Life Coolant |
The indicated volumes are approximate and may vary slightly depending on the condition of the system and the replacement method (partial or complete).
Please note that when purchasing, always take a reserve of about 10-15% of the estimated volume. This will allow you to compensate for possible losses during refueling and have a reserve for topping up in the future.
⚠️ Attention: Never add another type of antifreeze to an already running system, even if it seems compatible. Differences in chemical composition can lead to fluid coagulation and blockage of channels.
Frequent errors and operating tips
Many owners make the mistake of neglecting regular replacement. Antifreeze loses its properties over time: corrosion inhibitors burn out, and the density changes. This can cause the liquid to freeze in winter or boil in summer.
Some motorists try to save money by diluting the concentrate with water in the wrong proportions. This is critical: incorrect density reduces the boiling point and increases the risk of corrosion. Always use distilled water and follow the proportions on the label.
Monitor the condition of the expansion tank cap. The valve in the lid regulates the pressure in the system. If it is faulty, the pressure may be too low (low boiling) or too high (ruptured pipes).
If after replacing the antifreeze you notice that the level is dropping quickly, check the system for leaks. Inspect the pipes, radiator, pump and thermostat. Leaks are often visible only when the engine is running under pressure.
Regularly checking the level and condition of antifreeze every six months will help you avoid sudden breakdowns and expensive engine repairs on the road.
FAQ: Answers to popular questions
Below are answers to the most frequently asked questions from owners. Nissan Noterelated to the cooling system.
How often should you change antifreeze on a Nissan Note?
The official recommendation of the manufacturer is replacement every 90,000 km or every 5 years, whichever comes first. However, given the quality of the roads and operating conditions, many mechanics advise replacing them every 3-4 years to ensure engine protection.
Is it possible to mix red and green antifreeze?
No, mixing antifreezes of different colors (especially different chemical types, for example, carboxylate and silicate) is strictly prohibited. This will lead to a chemical reaction, sedimentation and destruction of the system seals.
How can you tell if there is air left in the system?
The main sign of an air lock is uneven heating of the interior (the heater blows cold or warm until the engine is warmed up) and incorrect temperature sensor readings. There may also be gurgling noise in the tank when the engine is running.
What to do if the antifreeze level drops, but there are no obvious leaks?
If there are no visible signs of leakage under the car, the problem may be evaporation through the cap (faulty valve) or antifreeze getting into the engine cylinders (head gasket failure). Check the oil level: if it becomes milky, stop the engine immediately.
Is it possible to add distilled water instead of antifreeze?
Distilled water should only be added in emergency situations to maintain the level. Constant operation on water will lead to corrosion of the system and overheating, since water does not have protective additives and boils at 100°C.