Nissan Almera is a popular car known for its reliability, but even it has its weaknesses. One of them is alternator belt tensioner pulley, which wears out over time and requires replacement. If you ignore the first signs of a malfunction, you may experience a broken belt, loss of battery charge, or even overheating of the engine.

In this article we will look at how self-diagnose problem, what rollers are suitable for Almera N16 And N17 (including restyled versions), and we will give step-by-step instructions for replacement. We will also talk about typical mistakes that car owners make during repairs, and give tips on extending the service life of parts.

Signs of a faulty belt tensioner roller Nissan Almera

The first symptoms of roller wear often go unnoticed until the problem becomes critical. Pay attention to the following signals:

  • 🔊 Whistling or squeaking from under the hood when starting the engine or at idle speed. The sound may disappear when you press the gas, but this does not mean that the problem has resolved itself.
  • 🔋 Voltage drop in the on-board network: dim headlights, electronic malfunctions, battery discharge overnight.
  • 🔄 Uneven wear on the alternator belt. If cracks or “eaten” edges are visible on the inside of the belt, this is a direct sign of problems with the tensioner.
  • 🚗 Vibration or twitching belt when the engine is running. Sometimes this is noticeable visually if you open the hood with the car running.

On Almera N16 (2000–2006) and N17 (2006–2012) the tensioner pulley often fails after 80–100 thousand km, but with aggressive driving or bad roads, the resource may be reduced to 50–60 thousand km. Cars with air conditioning are especially vulnerable - the additional load on the belt accelerates wear.

⚠️ Attention! If the roller is jammed, the belt can fray over several hundred kilometers. In the worst case, a break will lead to loss of control (if the belt drives the power steering) or overheating of the engine (if it rotates the pump).
📊 How often do you check the condition of belts and rollers?
  • Every 10 thousand km
  • Only when a whistle appears
  • When it breaks
  • I don't check

Which tensioner pulley to choose for Nissan Almera

There are many analogues on the market, but not all of them are equally reliable. Original video from Nissan has an article number 11920-4M000 (for Almera N16 with engines QG15DE/QG16DE/QG18DE) and 11920-4M00A (for N17 with HR16DE). However, the original is expensive (from 2500 to 4000 rubles), so many people choose high-quality analogues.

Brand Article Price (RUB) Features
NTN 11920-4M000 1800–2200 Japanese quality, bearing with extended life
Koyo 11920-4M000 1500–1900 Good price/quality balance, often installed on the conveyor
SKF VKM 35700 2000–2400 European manufacturer, suitable for severe operating conditions
Febi 22300 1200–1500 Budget option, but the quality is lower than NTN or Koyo

When choosing, pay attention to:

  • 🔍 Article matching your model Almera (check by VIN code or catalog).
  • 🛠️ Bearing type. Optimally, a closed bearing with heat-resistant lubricant (marking 2RS).
  • 📦 Complete set. Some kits come with mounting bolts, but more often you have to buy them separately.
⚠️ Attention! Cheap videos without a brand (for example, with AliExpress) often have play after 20 thousand km. Savings of 500–800 rubles can result in repeated repairs.
💡

Before purchasing, check the roller for play right in the store: twist it by hand. If you hear crunching or jamming, refuse to purchase, even if the price is attractive.

Tools and preparation for replacing the tensioner pulley

To replace the roller with Nissan Almera You don't need specialized tools, but you can't do without some keys. Here's the full list:

  • 🔧 Socket wrench or socket on 14 mm (for the roller mounting bolt).
  • 🔧 Key on 10 mm (to loosen the tensioner).
  • 🔧 Socket wrench or ratchet handle.
  • 🔧 Belt puller (optional, but simplifies the work).
  • 🔧 Torque wrench (for proper tightening of the bolt).
  • 🧴 WD-40 or similar lubricant (if the bolts are soured).

Also prepare:

  • 📋 New tensioner pulley (see section above).
  • 📋 New alternator belt (it is recommended to change along with the roller). Articles of original belts:
    • Almera N16 (without air conditioning): 11720-4M000.
    • Almera N16/N17 (with air conditioning): 11720-4M025.
  • 📋 Clean rags and gloves.

Before starting work:

  1. Disable negative battery terminal (to avoid short circuit).
  2. Place the car on a level surface and secure the wheels (use the handbrake or chocks).
  3. If the engine is hot, allow it to cool for 15 to 20 minutes.

Battery terminal disconnected|

All tools are prepared|

Bought a new roller and belt|

The car is fixed on a level surface|

The engine has cooled down (if it has been running recently) -->

Step-by-step instructions for replacing the tensioner pulley

Replacement process Nissan Almera N16/N17 takes about 1–1.5 hours if you have experience. Follow the instructions:

  1. Remove the alternator belt.

    Loosen the tensioner bolt with a wrench 10 mm, then slide the tensioner to the side to allow the belt to slack. Remove the belt from the pulleys. If the belt is very worn, it can be cut with pliers for convenience.

  2. Remove the old roller.

    Unscrew the roller mounting bolt with a wrench 14 mm. Be careful - the bolt may be over-tightened (factory tightening torque is 40–50 Nm). If it doesn't work, use WD-40 and lever.

  3. Install a new roller.

    Before installation, apply some lubricant to the bolt threads (eg Litol-24). Tighten the bolt by hand, then tighten with a torque wrench 45 Nm.

  4. Put on a new belt.

    Make sure the belt is positioned correctly on all pulleys (see diagram below). Tension the belt by moving the tensioner to the side and fix the bolt on 10 mm.

Belt layout for Almera N16 (with air conditioning):

Генератор


↓


Коленвал → Натяжитель → Кондиционер → Помпа

After installation, check the belt tension: it should bend by 8–10 mm when pressing with a finger between the generator and crankshaft pulleys. If the deflection is greater, tighten the tensioner.

What to do if the roller bolt rotates?

If the roller bolt turns and won't come out, try the following methods:

1. Secure the roller from turning by inserting a screwdriver into the grooves.

2. Use an impact wrench or a hammer with a spanner (carefully!).

3. As a last resort, cut the bolt with a grinder, but be careful not to damage the bracket.

Typical mistakes when replacing a tensioner pulley

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

  • 🔧 Incorrect bolt tightening torque. Weak tightening will lead to backlash, too strong - to deformation of the thread.
  • 🔄 Belt that is too tight or too tight. Over-tightening accelerates wear on the generator bearings; weak tension causes slipping and whistling.
  • 🛑 Ignoring the condition of other pulleys. If there is play on the generator or pump pulley, the new roller will not last long.
  • 🔄 Installing a twisted belt. This leads to uneven wear and breakage.

Another common problem is purchasing a video without checking compatibility. For example, a video from Almera Classic (for the Russian market) may not be suitable for Almera N16 European assembly due to differences in mounting.

⚠️ Attention! After replacing the roller, be sure to check the operation of the generator: measure the voltage on the battery with the engine running (there should be 13.8–14.5 V). If the voltage is lower, the problem may be in the generator, not the tensioner.

1. Condition of the belt (perhaps it is of poor quality).

2. Alignment of pulleys (they must lie in the same plane).

3. Generator performance (worn brushes can give similar symptoms).-->

How to extend the life of the generator roller and belt

Average tensioner pulley life - 60–100 thousand km, but with proper care it can be increased. Follow these tips:

  • 🔧 Check the belt tension every 15–20 thousand km. A loose belt slips and accelerates wear on the roller.
  • 🚿 Avoid contact with water and dirt on the belt and pulleys. After washing the engine or driving through puddles, dry the engine compartment.
  • 🛢️ Use quality lubricant for the roller bearing (if it is dismountable). Will do Molykote BR2 Plus or Litol-24.
  • 🔥 Don't overload the electrics. Frequent use of powerful consumers (for example, a subwoofer) increases the load on the generator and belt.

It is also worth paying attention to driving style. Sudden starts and braking create shock loads on the belt, which reduces its service life. On Almera with automatic transmission (AT) this effect is less noticeable, but on the mechanics (MT) wear increases.

If you frequently drive off-road or in high humidity conditions, it is recommended every 30 thousand km remove the belt and roller for visual inspection. Clean the pulleys from dirt and check the bearing play.

FAQ: Frequently asked questions about the tensioner pulley Nissan Almera

Is it possible to drive with a whistling roller?

Short term - yes, but risky. A whistling sound indicates bearing wear or belt slippage. If you ignore the problem, the belt may break, which will lead to loss of charge, power steering failure, or overheating (if the belt rotates the pump). On Almera N16 with engine QG18DE Belt breakage is especially dangerous due to the risk of overheating.

Which alternator belt is better to choose: original or analogue?

Original belt (Nissan 11720-4M025) is optimal in quality, but expensive (from 2000 rubles). Good analogues:

  • Gates 6PK1720 (1500–1800 rub.) - high quality, long service life.
  • Contitech 6PK1725 (1200–1500 rubles) - a budget but reliable option.
  • Dayco 6PK1720 (1300–1600 rub.) - suitable for difficult conditions.

Avoid cheap belts without a brand - they stretch and crack after only 20 thousand km.

Do I need to change the pulley when replacing the timing belt?

No, these are different systems. The alternator belt tensioner pulley is not connected to timing belt. However, if you change the timing belt to Almera N16 (interval - 100 thousand km), it is recommended to simultaneously check the status of:

  • Alternator belt tensioner roller.
  • Air conditioning belt (if equipped).
  • Pulley bearings.

This will avoid having to disassemble the front of the engine again.

What should I do if the belt whistles after replacing the roller?

The reasons may be as follows:

  1. The belt is loose - tighten the tensioner.
  2. Low quality belt - replace with a trusted brand (Gates, Contitech).
  3. Pulleys are not aligned - check alignment of alternator and pump.
  4. If moisture or dirt gets in, clean the pulleys with alcohol.

If the whistle only occurs in wet weather, this is normal - the belt is temporarily losing traction.

Is it possible to lubricate an old roller to make it last longer?

Theoretically it is possible, but this is a temporary solution. If the bearing is already worn out, lubricant (Litol, CV joint-4) will extend its life by 5–10 thousand km, but will not eliminate the backlash. It is better to replace the roller at the first sign of wear. For lubrication:

  1. Remove the video.
  2. Remove old grease and wash the bearing with gasoline.
  3. Apply new grease (do not overdo it - excess will flow out when heated).
⚠️ Attention! Not all rollers are collapsible. If the bearing is welded into the housing, lubrication is useless - only replacement.