Replacing spark plugs on a Nissan Almera: instructions with photos and tips

Replacing spark plugs with Nissan Almera - a procedure that many car owners prefer to perform on their own. And for good reason: with the right approach, it takes no more than an hour, saving up to 3,000 rubles at a service station. However, even in such a seemingly simple operation there are pitfalls. For example, incorrect tightening torque can lead to damage to the threads in the cylinder head, and the use of low-quality spark plugs can lead to misfires and increased fuel consumption.

In this article we will figure out how to change spark plugs Almera different generations (including popular G15, N16 And B10), what tools you will need, how to choose the right spare parts and what to pay attention to when dismantling. We will pay special attention to the typical mistakes that beginners make - from over-tightening to ignoring signs of wear on high-voltage wires. If you have never done such repairs, don’t worry: step-by-step photos and videos (links at the end of the article) will help you figure it out even without experience.

When to change spark plugs on a Nissan Almera: signs and regulations

The manufacturer recommends replacing spark plugs with Nissan Almera every 30,000–40,000 km for ordinary nickel spark plugs and 60,000–100,000 km for iridium or platinum. However, these figures are arbitrary: the actual service life depends on the quality of the fuel, driving style and engine condition. For example, if you often drive short distances (the engine does not warm up completely) or refuel at dubious gas stations, the spark plugs may fail after 20,000 km.

How do you know when it's time to change spark plugs? Here are the key symptoms:

• 🔥 Engine tripping — the engine “tweaks” at idle or during acceleration.
• ⚡ Misfires - feels like jerking when accelerating.
• 🛢️ Increased fuel consumption - if consumption has increased by 10–15% for no apparent reason.
• 🚗 Poor engine starting - especially in cold weather or after a long stay.
• 💨 Black carbon deposits on the electrodes - indicates a rich fuel mixture or oil starvation.

If you notice at least one of these signs, do not delay diagnosis. Candles are inexpensive (from 200 rubles apiece), and their untimely replacement can result in repair of ignition coils or even engine overhaul due to detonation.

⚠️ Attention: On Nissan Almera N16 with engine QR20DE Misfires are often associated not only with spark plugs, but also with faulty coils. If the problem remains after replacing the spark plugs, check the resistance of the coils with a multimeter (standard: 0.5–1.0 Ohm for the primary winding).

Which spark plugs are suitable for Nissan Almera: original vs analogues

The choice of candles depends on the generation Almera and engine type. Below is a table with original articles and popular analogues:

Model and engine	Original article	Analogs (brand + article)	Candle type
Almera G15 (1.6 HR16DE)	22401-JK00A	NGK IFR6A11, Denso IK16, Bosch 0242235666	Iridium
Almera N16 (1.8 QG18DE)	22401-4M500	NGK BKR6E-11, Denso K16PR-U11, Champion OE097	Nickel
Almera Classic B10 (1.6 QG16DE)	22401-4M505	NGK BKR5E-11, Denso K16TT, Beru 14FR-7DU	Nickel
Almera Tino (2.0 QR20DE)	22401-3M000	NGK PFR6J-11, Denso FK16HR11	Platinum

When choosing analogues, focus on heat number (for Almera usually 5–6) and the material of the central electrode. Iridium spark plugs last longer, but also cost 2–3 times more than nickel spark plugs. If you drive mostly around the city and do not plan to tune the engine, high-quality nickel spark plugs (for example, NGK BKR6E-11).

Beware of fakes! There are many counterfeit candles on the market NGK And Denso. How to distinguish the original:

• 🔍 The packaging must contain hologram sticker with serial number.
• 📦 The box should not be wrinkled or have fuzzy printing.
• 🔧 The brand logo is engraved on the candle (at NGK - on an insulator, at Denso - on the metal part).

Tools and preparation for replacing spark plugs

To replace spark plugs Nissan Almera you will need:

• 🔧 Candle key with rubber bushing (eg 16 mm for G15 or 21 mm for N16).
• 🔩 Extension cord And ratchet (or knob).
• 🛠️ Socket wrench on 10 mm for removing ignition coils (on G15 And N16).
• 🧤 Dielectric grease (For example, Liqui Moly Silicone-Fett) for coil contacts.
• 🧴 Compressed air or a brush for cleaning dust from wells.
• 📏 Torque wrench (optional, but recommended for precise tightening).

Before starting work:

1. Allow the engine to cool (working on a hot engine is dangerous - you can strip the threads).
2. Disconnect the negative terminal of the battery (to avoid short circuit).
3. Clean the area around the spark plug wells from dirt (debris getting into the cylinders can damage the pistons).

Cool the engine (at least 2 hours after driving)|Disconnect the battery (terminal “−”)|Clean the spark plug wells with compressed air|Check the new spark plugs for defects|Prepare a torque wrench (if available)-->

⚠️ Attention: On Nissan Almera G15 with engine HR16DE ignition coils are bolted under 10 mm, which are easy to rip off. Use a quality tool and do not use excessive force!

Step-by-step instructions for replacing spark plugs on a Nissan Almera

The process of replacing spark plugs on different generations Almera similar, but there are nuances. Let's consider a universal algorithm using an example Almera G15 (1.6 HR16DE):

Step 1. Removing the ignition coils

On G15 coils are individual for each cylinder. To remove them:

1. Disconnect the power connector from the coil (press the latch and pull up).
2. Unscrew the coil mounting bolt with a wrench on 10 mm.
3. Carefully remove the coil by rocking it from side to side (do not pull on the wire!).

Step 2. Removing old spark plugs

Use a spark plug wrench with extension:

1. Insert the key into the well and put it on the candle.
2. Turn counterclockwise until completely loose.
3. Remove the spark plug and check its condition (carbon deposits, gap, damage).

Step 3. Installing new spark plugs

Before installation:

• Check the gap between the electrodes (for G15 norm: 1.0–1.1 mm).
• Apply a thin layer anti-seize paste on the thread (for example, Liqui Moly Anti-Seize).
• Twist the candle by hand all the way, then tighten with a torque wrench 20–25 Nm.

Step 4: Reassembly

Install the coils in reverse order, after applying dielectric grease to contacts. Connect the connectors and battery terminal.

What to do if the candle is stuck?

If the spark plug does not unscrew, do not apply force - you risk breaking the thread. Try:

1. Treat the threads with a penetrating lubricant (for example, WD-40) and wait 10–15 minutes.

2. Use impact wrench with minimal effort.

3. Heat the area around the candle with a heat gun (the metal will expand and the connection will weaken).

If all else fails, contact a service center to drill out the spark plug and restore the thread.

On Nissan Almera N16 the process is similar, but the ignition coils are secured not with bolts, but with latches. Be careful when removing high-voltage wires - do not pull on the wires themselves, only on the lugs!

Typical mistakes when replacing spark plugs and how to avoid them

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

1. Re-upholstery of candles - leads to damage to the threads in the block head. Always use a torque wrench (if you don't have one, tighten the spark plug by hand until it stops and tighten it 1/4 turn).
2. Debris getting into the cylinders — before removing the spark plugs, be sure to clean the wells with compressed air. Sand or metal shavings can scratch the cylinder mirror.
3. Using the wrong candles - for example, installing spark plugs with the wrong heat rating (BKR7 instead of BKR6) will lead to detonation or overheating.
4. Damage to the insulator — do not drop the spark plugs or clean them with metal brushes (use a plastic scraper or a special cleaner).
5. Ignoring the state of the coils — if the coils have cracks or signs of breakdown, they also need to be replaced.

Another common problem is incorrect gap between electrodes. On Almera it must be within 0.8–1.1 mm. Check it out flat probe, and not round (more precisely). If the gap is too large, the engine will “trouble”; if it is too small, the candles will quickly become covered with soot.

⚠️ Attention: On Nissan Almera Classic B10 with engine QG16DE The problem of spark plugs “flooding” during a cold start is often encountered. If after replacing the spark plugs are wet again, check coolant temperature sensor - it may give incorrect readings from the ECU.

What to do after replacing spark plugs: checking and running in

After installing new spark plugs, do not rush to close the hood. First:

1. Check engine operation:
   • Start the engine and listen - there should be no extraneous noise or vibrations.
   • Check check engine light - if it lights up, you may have forgotten to connect the coil connector.
2. Evaluate the acceleration dynamics:
   • When test driving, pay attention to the smooth acceleration. Jerks or dips indicate misfire.
3. Fuel consumption monitoring:
   • Reset the on-board computer and track the consumption over 100–200 km. If it has not decreased, check fuel pressure or injector condition.

In the first 50–100 km after replacing the spark plugs, avoid aggressive driving - let the engine adapt to the new ignition parameters. If you have installed iridium spark plugs, their maximum efficiency will appear after 200–300 km.

Cost of replacing spark plugs: yourself vs service station

Cost of replacing spark plugs Nissan Almera depends on the type of candles, region and method of performing the work. Let's look at the average prices:

Parameter	On your own	At the service station
Cost of candles (4 pcs., nickel)	800–1 500 ₽	1,200–2,000 ₽ (with extra charge)
Cost of spark plugs (4 pcs., iridium)	2 500–4 000 ₽	3 500–5 000 ₽
Work (replacing spark plugs)	0 ₽	800–1 500 ₽
Additionally (injector cleaning, diagnostics)	0 ₽	1 000–3 000 ₽

As you can see, replacing it yourself saves up to 3,000 rubles. However, if you are not confident in your abilities or do not have a torque wrench, it is better to entrust the work to professionals - mistakes when replacing spark plugs are expensive.

FAQ: Frequently asked questions about replacing spark plugs on Nissan Almera

Is it possible to change spark plugs one at a time, or only as a set?

It is recommended to change all candles at the same time, even if only one failed. Different wear of the electrodes leads to uneven operation of the cylinders, which increases fuel consumption and load on the engine. An exception is if the spark plug is mechanically damaged (for example, due to unsuccessful replacement), and the rest are in good condition and have lasted less than 10,000 km.

What spark plug gap should be for Almera G15 with LPG?

On Almera G15 with gas-cylinder equipment, the gap between the electrodes should be 0.7–0.8 mm (against 1.0–1.1 mm for gasoline). This is due to the higher breakdown voltage of the gas-air mixture. Use iridium spark plugs with a thin central electrode (for example, NGK IFR6A11) - they are better suited for HBO.

What to do if after replacing the spark plugs the engine stalls?

There are several reasons:

1. Incorrect clearance - check it with a dipstick.
2. Poor coil contact — remove the coils and check the integrity of the connectors.
3. Marriage candles — swap the spark plugs from the “triple” cylinder with the one that is known to be working. If the problem has moved, the spark plug is defective.
4. High voltage wire breakdown - Start the engine in the dark and inspect the wires for sparks.

If all else fails, check compression in the cylinders - perhaps the problem is in the piston group.

Do I need to lubricate the spark plug threads before installation?

Yes, but only special anti-seize paste (For example, Liqui Moly Anti-Seize). Regular oil or graphite lubricant are not suitable - they can burn and the spark plug will be impossible to unscrew. Apply the paste thin layer only on the thread, avoiding contact with the electrodes.

Can I use spark plugs from other Nissan models?

Theoretically yes, if they match:

• Thread size (M14×1,25 for the majority Almera).
• Heat number (usually 5–6).
• The length of the threaded part (must be 19–26 mm).

For example, candles from Nissan Qashqai (1.6 HR16DE) suitable for Almera G15, and from Nissan Note (1.4 HR14DE) - no (different heat rating). Always check the catalogs NGK or Denso.