Replacing the cooling radiator on a Nissan Almera Classic: a complete guide with photos and tips

Nissan Almera Classic — a reliable sedan, but even its cooling radiator wears out over time. Cracks, leaks or clogged honeycombs can lead to overheating of the engine, and this is a serious risk for cylinder block And heads. A car service center will charge from 5 to 10 thousand rubles for a replacement, but if you have the tools and patience, you can do the job yourself.

This article contains detailed instructions on how to replace a radiator with Almera Classic (N16) with photos, tips for choosing spare parts and typical mistakes. We will figure out how to drain antifreeze without loss, remove the old radiator, install a new one and check the system for leaks. And we’ll also tell you why the original Nissan radiator (code 21460-4M000) lasts 2–3 times longer than analogues, but does not always justify its price.

Signs of a radiator malfunction: when is it time to change it

Radiator on Almera Classic rarely fails suddenly - usually the problem grows gradually. Here are the key symptoms that indicate the need for replacement:

• 🔥 Engine overheating — the temperature arrow on the dashboard rises above the middle even at idle.
• 💧 Antifreeze leak - puddles under the car (usually on the right side) or oily spots on the radiator.
• 🌀 Cell blockage — the radiator is clean on the outside, but almost no air passes through it (check by touch with the fan running).
• 🛠️ Damage to plastic tanks — cracks or chips on the upper/lower part of the radiator.

If you ignore these signs, the consequences can be critical: from deformation cylinder heads until the engine jams. For example, when local overheating aluminum cylinder head parts may begin to move, and o-rings may lose their tightness. Repairs in this case will cost tens of thousands of rubles.

⚠️ Attention: If the antifreeze goes away but there is no leak, check cylinder head gasket or expansion tank. On Almera Classic The plastic tank at the neck often cracks - it can easily be confused with a radiator malfunction.

Radiator selection: original vs analogues

There are more than 20 radiator options on the market for Nissan Almera Classic (N16). Prices range from 2,500 to 12,000 rubles. Here is a comparison table of popular models:

Manufacturer	Article	Price, ₽	Material	Features
Nissan (original)	21460-4M000	9 000–12 000	Aluminum/plastic	2 year warranty, precise fit, but high price
Denso	DR0006	6 500–8 000	Aluminum	The quality is close to the original, popular in services
Nissens	64101	5 000–6 500	Aluminum	Good price/quality balance, but thin cells
LUZAR (LRh 0110)	LRh 0110	2 500–3 500	Aluminum	Budget option, but often expires after 1–2 years
Termal	RNC101	3 000–4 000	Copper/brass	Lasts longer, but is heavier and more expensive to repair

Original radiator Nissan - the best choice for reliability, but its price is often overestimated. If your budget is limited, pay attention to Denso or Nissens. But LUZAR and other cheap analogues are best avoided - they can leak after a few months, especially when using low-quality antifreeze.

When purchasing, be sure to check:

• 📦 Packaging — the original comes in a branded box with a hologram.
• 🔍 Marking — the radiator must have the article number and manufacturer’s logo stamped on it.
• 🔧 Complete set — the kit must contain rubber seals and fasteners.

Tools and consumables: what you need

To replace the radiator with Almera Classic No specialized tools are needed - a standard set is enough. Here's the full list:

• 🔧 Keys and sockets: 10, 12, 14 mm (preferably with a ratchet).
• 🔨 Screwdrivers: cross and flat (for clamps).
• 🛠️ Pliers - for removing tie clamps.
• 🧤 Gloves — antifreeze is toxic!
• 📦 Drain container (at least 6 liters).
• 🧴 Antifreeze — 5–6 liters (recommended Nissan Coolant L248 or analogues G12+).
• 🧽 Rags and brush - to clean the seat.
• 🔥 Sealant (optional) - for example, ABRO 11-AB for sealing pipes.

If you plan to flush the system, additionally prepare distilled water (10–15 liters) and special washing (For example, LIQUI MOLY Kuhler-Reiniger). Do not use tap water - it contains salts that will settle in the honeycomb of the new radiator.

Step-by-step instructions: removing the old radiator

Before starting work, make sure that the engine has completely cooled down - the antifreeze in the system can be hot (up to 90°C). Also place the car on a level surface and secure it with the handbrake.

Step 1: Drain the antifreeze

On Almera Classic The drain plug is located in the lower right corner of the radiator (when viewed in the direction of travel). Algorithm:

1. Place the container under the stopper.
2. Unscrew the cap on the radiator (10 mm wrench).
3. Open the cap of the expansion tank - this will speed up the draining.
4. Wait until the antifreeze has completely drained (about 5-7 minutes).

If the plug does not unscrew or is torn off, you can drain the liquid through the lower pipe by loosening the clamp.

Step 2: Dismantling pipes and fasteners

After draining the antifreeze:

1. Loosen the clamps on the upper and lower radiator hoses (use pliers or a screwdriver).
2. Remove the pipes by gently rocking them from side to side.
3. Disconnect the fan connector (it is located to the right of the radiator).
4. Unscrew the 4 radiator mounting bolts (two on top and two on bottom).

On some versions Almera Classic I'll have to take it off air filter And battery pad for ease of access. Don't lose the rubber seals between the radiator and the body!

Step 3: Removing the Heat Sink

Gently pull the radiator towards you, tilting it slightly upward. If it does not budge, check that all fasteners are unscrewed. Please note air conditioner condenser — it is located to the right of the radiator and should not interfere with dismantling.

⚠️ Attention: Do not pull the radiator by the honeycombs - they bend easily! Hold onto plastic tanks or metal fasteners.

What to do if the radiator is “stuck” to the pipes?

If the pipes cannot be removed, do not pull them by force - this can tear the rubber. Spray the connection with WD-40 or silicone grease, wait 5-10 minutes and carefully twist the pipe around the axis. As a last resort, you can cut the pipe with a knife and replace it with a new one.

Installation of a new radiator and assembly

Before installing a new radiator, clean the seat from dirt and old sealant. Check status cooling fan - if it works intermittently, it is better to replace it too (part number 25410-4M000).

Step 1: Radiator Installation

Installation occurs in reverse order:

1. Place the radiator in place, aligning the fasteners.
2. Tighten the bolts (do not fully tighten so that you can adjust the position).
3. Connect the pipes, having previously lubricated them with sealant (if using).
4. Tighten the clamps, but do not overdo it - the plastic radiator tanks may crack.

Step 2: Add Antifreeze

Use only high-quality antifreeze (For example, Nissan Coolant or CoolStream Premium). Filling algorithm:

1. Close the drain plug.
2. Fill the expansion tank with antifreeze to the mark MAX.
3. Start the engine and let it idle for 5-7 minutes.
4. Add antifreeze to the level (it will go into the system when it warms up).
5. Check for leaks.

After replacing the radiator, be sure to bleed the systemto remove air pockets. To do this:

1. Raise the front of the car on a jack (or drive it onto an overpass).
2. Open the expansion tank cap.
3. Rev up to 3000 rpm 2-3 times - this will help expel the air.

Typical mistakes when replacing a radiator

Even experienced car owners sometimes make mistakes that lead to repeated breakdowns. Here are the most common:

• 🔧 Re-stretching clamps - leads to cracks in plastic radiator tanks.
• 💧 Using water instead of antifreeze - in winter this is guaranteed to burst the radiator.
• 🌀 Unflushed system - if you do not remove the old antifreeze, the new radiator will quickly become clogged.
• 🔥 Ignoring air jams - leads to local overheating of the engine.
• 🛠️ Savings on pipes - old rubber hoses may crack during installation.

Another common mistake is wrong choice of antifreeze. For example, mixing G11 (green) and G12 (red) leads to the formation of sediment, which clogs the radiator honeycombs. On Almera Classic It is recommended to use antifreeze based on ethylene glycol with permission Nissan L248.

⚠️ Attention: If after replacing the radiator the interior smells of antifreeze, check stove. Perhaps the leak is coming through the heater radiator (part number 27210-4M000).

Flushing the cooling system: is it necessary?

If the old antifreeze was dirty or there is sediment in the system, it is better to flush the radiator before installation. Here's how to do it:

1. After draining the antifreeze, pour it into the system distilled water (or special washing).
2. Start the engine and let it run for 10-15 minutes.
3. Drain the water and repeat the procedure 2-3 times until the liquid is clear.

To remove heavy deposits you can use citric acid (100 g per 5 liters of water) or vinegar (500 ml per 10 liters). But after such washing, be sure to thoroughly rinse the system with distilled water!

FAQ: Frequently asked questions about replacing a radiator

Is it possible to drive with a current radiator if you add antifreeze?

Short term - yes, but this is a temporary solution. A constant leak of antifreeze leads to:

• Engine overheating (risk of cylinder head deformation).
• Air entering the system (formation of plugs).
• Corrosion of metal parts (due to lack of additives).

If the leak is severe (more than 0.5 liters per week), the radiator must be replaced immediately.

What antifreeze should I fill in Almera Classic after replacing the radiator?

Optimal choice - Nissan Coolant L248 Premix (purple, G12+). Alternatives:

• CoolStream Premium (red, G12++).
• Motul Inugel Optimal (orange, G13).

Cooling system volume - 5.5 liters. Do not mix antifreeze of different colors!

Do I need to change the thermostat along with the radiator?

Required if:

• The engine takes a long time to warm up or overheats.
• The thermostat has never been changed (lifetime - 80-100 thousand km).
• When tested, it does not open in boiling water (test in a saucepan).

The cost of the original thermostat (21200-4M000) - about 1,500 rubles.

How long does it take to replace a radiator?

If you have experience - 1.5–2 hours. Beginners may need 3-4 hours, especially if they have to deal with stuck pipes or rusty bolts. Tip: Start your work in the morning so you don't have to rush.

Can I install a radiator from another Nissan model?

Theoretically, radiators from Nissan Primera P12 (2002–2008) and Nissan Sunny B15, but:

• The mounting locations may differ.
• The pipes may not match in diameter or angle.
• The cooling fan may not be in place.

It’s better not to experiment - buy a radiator specifically for Almera Classic (N16).