Antifreeze for Nissan Terrano: which one to choose, when to change and how to fill it correctly

Cooling system Nissan Terrano - a critical component on which the stability of the engine, the life of the pump and radiator depend. Wrong choice or late replacement antifreeze can lead to overheating of the motor, corrosion of aluminum parts, or even jamming of the thermostat. In this article we will look at which antifreeze is suitable for Terrano different generations, how often to change it and what mistakes owners make when servicing the cooling system.

Feature Nissan Terrano (especially models with engines HR16DE, MR20DE and diesel K9K) — sensitivity to the quality of the coolant. The manufacturer recommends using original Nissan fluids or certified analogues with approval Nissan L250/L255. But there are many options on the market, and not all of them are compatible. Next is a detailed guide with technical nuances that are rarely mentioned even in official manuals.

What types of antifreeze are suitable for Nissan Terrano

B Nissan Terrano (including restyled versions 2014–2020) used carboxylate antifreeze based on ethylene glycol. He belongs to the class G12+ or G12++ by classification VW, but with an important caveat: the liquid must be silicate-free (without amines and nitrites). This requirement is related to the materials of the cooling system - aluminum radiators and plastic pipes, which are destroyed by aggressive additives in 2-3 years.

Original antifreezes for Terrano are supplied under article numbers:

• 🔹 Nissan Coolant L250 (blue, concentrate) - article KE902-99932;
• 🔹 Nissan Coolant L255 (green, ready for pouring) - article number KE902-99931;
• 🔹 Nissan Long Life Coolant (purple, for new models) - article KE902-99944.

Among the analogues are proven options:

• 🔹 CoolStream A-110 (red, G12++);
• 🔹 Sintec Unlimited (purple, G12++);
• 🔹 Motul Inugel Optimal (yellow, G13 - suitable for Terrano 2018+).

⚠️ Attention: Never mix antifreeze of different colors or brands, even if they belong to the same class. For example, CoolStream A-110 (red) and Nissan L255 (green) have different additive packages. Mixing them will lead to sedimentation and clogging of the radiator channels.

Frequency of antifreeze replacement: when and why

Official regulations Nissan requires replacement of antifreeze every 90,000 km or 6 years (whichever comes first). However, this interval is only relevant for original liquids L250/L255. For analogues, the period is reduced to 60,000 km or 4 years, since they quickly lose their anti-corrosion properties.

Signs that it's time to change antifreeze ahead of schedule:

• 🔥 Darkening of the liquid (the color becomes brown or black);
• 💧 The appearance of flakes or sediment in the expansion tank;
• 🌡️ Frequent engine overheating (even with a working thermostat);
• 🔧 The smell of burning or acid from the tank.

Special attention - Nissan Terrano with diesel engine K9K. In these engines, antifreeze comes into contact with cast iron liners, which accelerates the oxidation of additives. For diesel versions, it is recommended to reduce the replacement interval to 50,000 km or 3 years, regardless of the type of antifreeze.

Terrano model	Engine type	Recommended antifreeze	Replacement interval
Terrano I (R51, 2013–2017)	HR16DE (gasoline)	Nissan L250 or CoolStream A-110	90,000 km / 6 years
Terrano II (facelift, 2018–2020)	MR20DE (gasoline)	Nissan L255 or Motul Inugel	90,000 km / 5 years
Terrano (all years)	K9K (diesel)	Only original Nissan L250	50,000 km / 3 years

Step-by-step instructions for replacing antifreeze

To replace antifreeze in Nissan Terrano you will need:

• 🔧 Key for 10 and 14 mm;
• 🛠️ Screwdriver with a flat blade;
• 🧤 Gloves and drainage container (minimum 8 liters);
• 🚿 Distilled water (10–15 liters for rinsing).

Algorithm of actions:

1. Draining old antifreeze:
   • Place the car on a level surface and let the engine cool (at least 2 hours).
   • Remove the crankcase protection (if equipped). Place a container under the drain hole on the radiator (bottom right).
   • Unscrew the drain plug with a 14 mm wrench. Wait until the liquid is completely drained.
   • Unscrew the plug on the engine block (10 mm wrench) - this is the drain valve of the cooling system.
2. Flushing the system:
   • Close the drain holes. Fill the expansion tank with distilled water to the maximum.
   • Start the engine and let it idle for 10–15 minutes.
   • Drain the water and repeat the procedure 2-3 times until the water runs clear.
3. Filling with new antifreeze:
   • If you are using a concentrate (for example, Nissan L250), mix it with distilled water in a 1:1 ratio.
   • Fill the expansion tank with liquid up to the mark MAX.
   • Start the engine, turn on the heater to maximum. Add antifreeze as the level drops (the system will self-air).

Make sure the engine is completely cool|Prepare a container for draining (minimum 8 liters)|Buy original antifreeze or a certified equivalent|Check the pipes for cracks|Prepare distilled water for flushing-->

⚠️ Attention: After replacing the antifreeze, avoid sudden loads on the engine for the first 500 km. During this period, residual air pockets are possible, which can lead to local overheating. Monitor the temperature on the dashboard.

Common mistakes when replacing antifreeze

Even experienced car owners make mistakes that reduce the life of the cooling system. Here are the most critical ones:

• 🚫 Using tap water to dilute the concentrate. Chlorine and salts in such water accelerate the corrosion of aluminum parts.
• 🚫 Incomplete drainage of old antifreeze. Remains of old fluid (especially if it is of a different type) nullify the properties of the new antifreeze.
• 🚫 Ignoring flushing. If there is sediment or rust in the system, the new antifreeze will quickly lose its properties.
• 🚫 Overfilling or underfilling. The level in the tank must be strictly between MIN And MAX. Overfilling will lead to excess pressure, underfilling will lead to air pockets.

A separate problem - air jams. They form if you do not follow the filling order or do not ventilate the system. Signs of a traffic jam:

• 🔥 The engine is warming up, but the stove is blowing cold air;
• 💦 The level of antifreeze in the tank is jumping;
• 🚗 Extraneous gurgling sounds from under the hood.

To clear a blockage:

1. Start the engine and let it run for 5 minutes.
2. Squeeze the upper radiator hose with your hand (with a glove!) - this will help expel the air.
3. Add antifreeze to the level if it is gone.

What happens if you don't change antifreeze on time?

Old antifreeze loses its anti-corrosion properties, which leads to:

- Destruction of aluminum parts (radiator, pump, thermostat).

- Clogging of the radiator channels with sediment - engine overheating even with a working thermostat.

- Reduced pump life (bearings and seal suffer from cavitation).

- There is a risk of the thermostat getting stuck in the closed position (the engine is boiling, but the stove is not heating).

Antifreeze compatibility: what can be mixed and what cannot

In emergency situations (for example, in case of a leak on the way), adding antifreeze is allowed, but with strict restrictions:

Type of antifreeze in the system	What can you add?	What not to top up
Nissan L250 (blue)	Distilled water (up to 30% of volume)	Any G11, G12 (except G12++)
Nissan L255 (green)	CoolStream A-110 or Sintec Unlimited	Antifreeze, G11, cheap G12
Motul Inugel (purple)	Distilled water (short term)	Any silicate-based antifreeze

If you do not know what antifreeze is in the system, the only safe option — complete replacement with flushing. Topping up “by eye” often leads to:

• 🔬 The loss of gel-like sediment (clogs the stove radiator);
• 🔥 Local overheating of the cylinder head;
• 💥 Destruction of rubber seals (due to incompatibility of additives).

How to check the quality of antifreeze without a laboratory

You can assess the condition of antifreeze yourself using simple tests:

1. Color and transparency:
   • ✅ Normal: bright color (blue, green, purple), without turbidity.
   • ❌ Danger: brown or black color, flakes, metallic shine.
2. Smell:
   • ✅ Normal: neutral or slightly sweet.
   • ❌ Danger: smell of burning, acid or ammonia.
3. Density:
   • Use a hydrometer. The density should be 1.070–1.080 g/cm³ at +20°C.
   • If the density is below 1.065, the antifreeze is diluted with water and has lost its frost resistance.
4. Foam:
   • Shake the liquid in a transparent container. The foam should settle in 2-3 seconds. If the foam is persistent, the antifreeze has lost its properties.

For accurate diagnosis, you can use test strips for antifreeze (sold in auto stores). They show the pH level and additive content. Critical values:

• 🔴 pH below 7.0 - high corrosive activity;
• 🔴 pH above 10.5 - risk of aluminum destruction;
• 🔴 No reaction on the additive indicator - antifreeze is “dead”.

Frequently asked questions about antifreeze in Nissan Terrano

Is it possible to use G13 (purple) antifreeze in Terrano?

Yes, but only for 2018 and newer models with engines MR20DE. For old people Terrano (2013–2017) from HR16DE better stick to it G12++ (For example, Nissan L255). G13 has a different additive package optimized for modern turbocharged engines.

How much antifreeze is needed for a complete replacement?

Cooling system volume Nissan Terrano:

• 🔹 HR16DE (1.6 l) — 6.5 liters;
• 🔹 MR20DE (2.0 l) — 7.2 liters;
• 🔹 K9K (diesel 1.5 l) — 7.0 liters.

When purchasing, take 8 liters of prepared liquid or 4 liters of concentrate + 4 liters of distilled water.

What should I do if the engine gets hot after replacing the antifreeze?

Reasons for overheating after replacement:

1. Air lock (see instructions for deflation above).
2. Faulty thermostat (could be stuck in the closed position).
3. Clogged radiator (if flushing has not been done).
4. Poor quality antifreeze (counterfeit or incompatible composition).

Stop the engine immediately and check:

• 🔹 Is the cooling fan working;
• 🔹 Is the upper radiator pipe hot (if cold, the thermostat does not open);
• 🔹 Is there an antifreeze leak under the car?

Is it possible to use antifreeze instead of antifreeze?

No! Antifreeze is an outdated type of antifreeze class G11 on a silicate basis. He:

• 🚫 Quickly forms sediment in aluminum radiators;
• 🚫 Not compatible with modern rubber pipes;
• 🚫 Has a service life of no more than 2 years (versus 5–6 years for G12++).

Using antifreeze in Nissan Terrano will lead to premature failure of the pump and radiator.

How often should I check the antifreeze level?

Check the level in the expansion tank:

• 🔹 Every 1,000 km or before a long trip;
• 🔹 After intensive use (for example, towing a trailer);
• 🔹 With sudden temperature changes (in winter).

The level should be between MIN And MAX on a cold engine. Add only distilled water (if the level has dropped slightly) or original antifreeze (if the leak is serious).