Antifreeze for ŠKODA Kodiaq: how to choose, how much to pour and how to replace yourself

Cooling system ŠKODA Kodiaq - a critically important node, on which depends not only the stable operation of the engine, but also the life of the turbine (if any), pumps and even gearboxes. Antifreeze here performs several functions at once: removes heat, protects the metal from corrosion, lubricates seals and prevents the formation of scale. However, many owners Kodiaka They are faced with a dilemma: what antifreeze to pour, how often to change it and can different types be mixed?

In this article we will look at original antifreeze specifications for Kodiaq, compatible analogues, cooling system volume for different engines, and also give step-by-step replacement instructions taking into account the nuances of the design. We will pay special attention to typical errors that lead to overheating of the engine or premature failure of the pump. If you plan to service the car yourself, you will find answers to all key questions here.

Original antifreeze for ŠKODA Kodiaq: specifications and articles

Manufacturing plant ŠKODA recommends using antifreeze that meets specifications VW TL 774-G (for models up to 2018) or VW TL 774-J (for cars from 2018). These liquids belong to the class G12++ or G13 and have a violet (purple) color. Important: color is not a determining factor - it may vary depending on the manufacturer, but the base must be ethylene glycol with an organic additive package (OAT).

Original antifreeze from Volkswagen Group Available under article numbers:

• 🔹 G 013 A8J M1 — concentrate, 1.5 l (diluted with distilled water 1:1)
• 🔹 G 013 A8J M2 — ready-made liquid, 1.5 l (purple)
• 🔹 G 013 A8J M3 — concentrate, 5 l (for complete replacement)

These fluids are fully compatible with aluminum engine blocks Kodiaq (including 1.5 TSI, 2.0 TSI and 2.0 TDI) and do not cause corrosion in systems with plastic or rubber elements. The cost of the original antifreeze is higher than its analogues, but its use guarantees compliance with all factory requirements.

⚠️ Attention: Antifreeze G12+ (red) or G11 (green/blue) not suitable for Kodiaq! Their additives can react with aluminum, which will lead to the formation of sediment and blockage of the radiator channels.

Analogues of the original antifreeze: what can be filled

If the original antifreeze VW is not available, you can use high-quality analogues from trusted manufacturers. The main condition is compliance with the specification VW TL 774-G/J and class G12++/G13. Below is a list of reliable brands:

Manufacturer	Article	Type	Color	Volume
MOTUL	Inugel Optimal	G13	Purple	1 l / 5 l
LIQUI MOLY	Kühlerfrostschutz KFS 2001 Plus	G12++	Lilac	1.5 l / 5 l
FEBI	32615	G13	Purple	1.5 l
RAVENOL	HJC Hybrid Japanese Coolant	G12++	Green (compatible!)	1 l / 5 l

Antifreeze deserves special attention RAVENOL HJC — despite the green color, it fully complies with the requirements VW TL 774-J and is successfully used in dealerships. However, before purchasing, always check the specification certificate on the packaging.

When choosing an analogue, avoid cheap liquids from unknown manufacturers. Low-quality antifreeze may contain aggressive additives that destroy cylinder head gasket or pump seals. It is also not recommended to mix antifreeze of different brands, even if they are of the same class - this can lead to sedimentation.

Antifreeze volume in ŠKODA Kodiaq: data for different engines

Total volume of the cooling system Kodiaq depends on the engine type and the availability of additional options (for example, climate control with a separate heat exchanger). Below are the official data from ŠKODA:

• 🔧 1.5 TSI (150 hp, code DADA) — 6.8 l (including expansion tank)
• 🔧 2.0 TSI (190 hp, code DKZA) — 7.2 l
• 🔧 2.0 TSI (245 hp, code DLBA) — 8.0 l (including additional radiator)
• 🔧 2.0 TDI (150/190 hp, codes DFGA/DLHA) — 7.5 l

Important: when partial replacement (for example, when draining through the lower radiator pipe), up to 30–40% of the old fluid remains in the system. Therefore, a complete replacement will require flushing or the use of vacuum equipment (as in a service station). If you plan to replace antifreeze yourself, buy 1–1.5 liters more than the specified volume.

When to change antifreeze in Kodiaq: regulations and signs of wear

Official regulations ŠKODA provides for replacing antifreeze every 5 years or 250,000 km (whichever comes first). However, these terms are only valid for the original liquid. VW G13. If you use analogues, the replacement interval may be reduced to 3–4 years or 150,000 km — check the information on the packaging.

Do not wait for routine replacement if you notice the following signs:

• 🚨 Color change (darkening, cloudiness, appearance of a rusty tint)
• 🚨 Sediment or flakes in the expansion tank
• 🚨 Frequent overheating motor (even with the fan running)
• 🚨 Foam on the surface of the liquid (a sign of air entry or additive incompatibility)

It is also worth checking the antifreeze if less than 2 years have passed since the replacement, but you notice leaking from the pump or white coating on the expansion tank cap - this may indicate a reaction of additives with cooling system materials.

What happens if you don't change the antifreeze?

Over time, additives in antifreeze lose their properties, which leads to corrosion of aluminum parts, clogging of the radiator and deterioration of heat transfer. In critical cases, this can cause engine overheating, cylinder head deformation, or even piston seizure.

Step-by-step instructions for replacing antifreeze in a ŠKODA Kodiaq

To replace antifreeze with your own hands you will need:

• 🛠️ New antifreeze (see volume above)
• 🛠️ Distilled water (10–15 l for rinsing)
• 🛠️ Drain container (at least 10 l)
• 🛠️ Set of keys and sockets (including T30 to remove protection)
• 🛠️ Bleeding hose (optional, but simplifies the process)

Replacement process:

1. Draining old antifreeze:
   • Place the car on a level surface and let the engine cool (antifreeze temperature should not exceed 50°C).
   • Remove the engine protection (4 bolts T30).
   • Place a container under the drain hole on the radiator (lower left corner) and unscrew the plug.
   • Open the expansion tank cap to speed up draining.
2. Flushing the system (optional):
   • Close the drain hole and fill with distilled water through the expansion tank.
   • Start the engine and let it idle for 10-15 minutes.
   • Drain the water and repeat the procedure 2-3 times until the liquid is clear.
3. Refilling with new antifreeze:
   • If you use concentrate, mix it with distilled water in a 1:1 ratio.
   • Pour the liquid into the expansion tank to the mark MAX.
   • Start the engine and warm it up until the fan turns on (about 90°C).
   • Add antifreeze to the level (when it warms up, air will leave the system).

After replacement, be sure to check the system for leaks. Start the engine, let it run for 5–10 minutes and inspect:

• 🔍 Radiator drain plug location
• 🔍 Pipe connections
• 🔍 The fluid level in the reservoir (should be between MIN and MAX)

⚠️ Attention: If after replacement the antifreeze quickly darkens (within 1-2 weeks), this is a sign that there are deposits of old fluid in the system. In this case, repeated rinsing is required using special cleaners (for example, LIQUI MOLY Kuhler-Reiniger).

Typical mistakes when replacing antifreeze and how to avoid them

Even experienced car owners sometimes make mistakes that lead to serious consequences. Here are the most common of them:

1. Mixing incompatible antifreezes.

   For example, adding G11 (blue) in G13 (purple) causes a chemical reaction that produces a gel-like precipitate. This leads to clogging of the radiator channels and overheating of the engine.

2. Ignoring system flushing.

   If old antifreeze remains in the system (especially with sediment), the new one will lose its properties much faster. Rinsing with distilled water is mandatory when changing the type of liquid (for example, with G12+ on G13).

3. Overfilling or underfilling antifreeze.

   Excess fluid will lead to its release through the valve of the expansion tank, and too little will lead to the formation of air pockets. The optimal level is between MIN and MAX on a cold engine.

4. Replacement without bleeding the system.

   Air pockets may remain in the heater core or block head, which will lead to poor heating of the interior or local overheating. To bleed, use a hose or press sharply on the upper radiator hose several times with the engine running.

Another common problem is leak after replacement. Most often it occurs due to:

• 🔧 Incorrectly tightened radiator drain plug (required torque: 2.5 Nm).
• 🔧 Damaged pipes (when draining antifreeze, they can be easily pinched or torn).
• 🔧 Worn thermostat gasket (if it was removed for washing).

Frequently asked questions (FAQ)

Is it possible to mix G12++ and G13 antifreeze?

Yes, these fluids are compatible with each other, as they have a similar additive package (OAT). However, it is not recommended to mix them in the long term - it is better to completely replace them with one type as soon as possible.

What kind of antifreeze is included in the Kodiaq from the factory?

From factory to ŠKODA Kodiaq antifreeze is poured in VW G13 (purple) to specification TL 774-J. It is designed for 5 years of operation or 250,000 km.

What to do if the antifreeze goes away, but there is no leak?

If the antifreeze level drops, but there are no external leaks, the following reasons are possible:

• 🔥 Burnout through the cylinder head gasket (check the oil for emulsion).
• 🔥 Leaking into the heater core (smell of antifreeze in the cabin, fogging of windows).
• 🔥 Faulty expansion tank valve (check its tightness).

For diagnostics, use a test for gas leaks in the cooling system (for example, with a UV-leak detector).

Do I need to flush the system when replacing antifreeze?

Flushing is required in the following cases:

• 🚿 When changing the type of antifreeze (for example, from G12+ on G13).
• 🚿 If the old antifreeze has sediment or is discolored.
• 🚿 After engine repair (replacement of cylinder head, pump, etc.).

For rinsing, use distilled water or special products (for example, LIQUI MOLY Kuhler-Reiniger).

How to check the quality of antifreeze?

You can assess the condition of antifreeze in the following ways:

• 🔬 Visually: Cloudiness, sediment or discoloration are signs of aging.
• 🔬 Test strips: determine the pH level and additive content (sold in car dealerships).
• 🔬 Hydrometer: checks the freezing temperature (should not be higher than -35°C).

If the antifreeze has lost its properties, it must be replaced, even if the scheduled time has not passed.