Crossover Attachment System Nissan Murano The second generation (Z51) relies heavily on the integrity and correct tension of drive belts. Unlike timing chains, which are designed to last the entire service life of the engine, the alternator and accessory belts are subject to constant dynamic loads, temperature changes and external factors. Failure to promptly replace this element can lead to sudden failure of air conditioning systems, battery charging, and even overheating of the power unit.
Many owners Nissan Murano Z51 encounter a characteristic squeak during a cold start or a feeling of vibration in the steering wheel, not suspecting that the problem lies precisely in drive belt. Modern cars use a poly-V-belt (V-belt), which transmits torque from the crankshaft to multiple units simultaneously. Its condition directly affects the reliability and operating comfort of your SUV.
Design and purpose of the belt on the Murano Z51
In the engine VQ35DE, which was installed on most models Murano Z51, a single V-ribbed belt is used. Its task is to drive the generator, air conditioning compressor, cooling system pump and hydraulic power steering. This is a complex unit where each element requires stable operation, and the belt acts as a connecting link.
Structurally, the belt is an elastic band with many longitudinal ribs on the working surface. This shape provides better flexibility and contact with the pulleys compared to classic V-belts. The manufacturing material is abrasion-resistant rubber with reinforcing cord threads, which allows it to withstand high engine speeds reaching 6500 rpm.
Tension system in Nissan Murano performed automatically using a hydraulic or spring tension roller. This eliminates the need to manually adjust the tension each time you check, but the tensioner mechanism itself is also a consumable item. If the tensioner jams or loses elasticity, the belt begins to slip or break.
First signs of wear and tear
You can determine that a belt requires replacement by a number of external and sound signs. The most obvious symptom is a specific whistle or squeak that occurs when starting the engine or when turning on a consumer, such as an air conditioner. This sound indicates the belt is slipping along the pulley due to loss of elasticity or contamination of the working surface.
A visual inspection allows you to see cracks on the inner surface, delamination of the material or the absence of part of the ribs. Even one small crack grows over time, which ultimately leads to complete destruction of the belt. Pay attention to the presence of oil traces on the belt - this is a sure sign that there is a problem with the engine seals, and the new belt will quickly become unusable.
Vibration and hum from the engine can also indicate problems with the drive. If a belt is twisted or unevenly worn, it begins to hit the body of the car, creating an unpleasant driving experience. In some cases, wear on the tensioner roller can mimic problems with the belt itself, so both elements need to be diagnosed.
⚠️ Attention: Do not try to ignore the squeaking of the belt, hoping that it will “go away” after warming up. In conditions Nissan Murano Z51 This can lead to a high speed break, causing instantaneous loss of battery charge and overheating of the engine, which could result in a major overhaul.
- Less than 100 thousand km
- 100-150 thousand km
- 150-200 thousand km
- More than 200 thousand km
Selection of original and analog spare parts
When purchasing a spare part, it is important to focus not only on the brand, but also on the specific article suitable for your engine. For Nissan Murano Z51 with engine VQ35DE the original belt number often begins with a prefix 11720. However, before purchasing, be sure to check the VIN code of your car, as there may be nuances depending on the year of manufacture and the market.
Original belt from Nissan guarantees compliance with all factory quality and durability standards. However, there are proven analogues from such manufacturers as Gates, ContiTech or Dayco, which often surpass the original in terms of service life and quality of the rubber compound. The main thing is to avoid cheap fakes that cannot withstand the high temperatures of the engine compartment.
- ✅ Gates - one of the world leaders, offers belts with Kevlar technology for increased strength.
- ✅ ContiTech - German quality, often used as the first set on the conveyor.
- ✅ Original Nissan - guarantee of compatibility, but the price may be higher than analogues.
When choosing a replacement kit, it is often recommended to buy not only the belt itself, but also the tension pulley assembly. Replacing only a belt with a worn tensioner is a waste of money, since the old roller will quickly “kill” the new rubber. The complete set ensures stable operation of the system for a long time.
What items are often confused when ordering?
Often owners order belts from X-Trail or Qashqai, which are visually similar but have a different length or rib pitch. Always check cross numbers before purchasing.
Step-by-step instructions for replacing the belt
Replacing the drive belt with Nissan Murano Z51 does not require engine removal or complex dismantling work, but access may be limited due to plastic protective covers. The process begins with preparation: turn off the engine, open the hood and allow the system to cool to avoid burns from hot parts.
The first step is to remove the plastic air duct and, if necessary, the engine protection for easy access to the pulleys. Locate the tension pulley and use the correct size wrench or wrench (usually 14 mm or 17 mm) to release the tension. Slide the pulley in the direction indicated by the arrow on the housing and remove the old belt from the pulleys.
☑️ Belt replacement process
Installing a new belt is carried out in the reverse order. It is important to correctly route the belt over all pulleys in accordance with the diagram, which is often shown on the plastic casing or in the service book. If there is no diagram, remember the location or take a photo of the old belt before removing it so as not to confuse the routes.
After installation, make sure that the belt sits smoothly in the pulley grooves and is not twisted anywhere. Release the tension roller, let it take its working position, and check again for correct installation. Start the engine and listen to the operation of the system - there should be no extraneous noise.
Before starting work, be sure to disconnect the battery terminal to avoid accidental short circuits when working with tools in a cramped engine compartment.
Specifications and comparison
To correctly select and understand the load on the system, it is useful to know the exact belt parameters. The length and number of ribs determine its ability to transmit power without slipping. Below is a table with the main parameters for the most common modifications Murano Z51.
| Parameter | Value (VQ35DE) | Belt type | Recommended replacement interval |
|---|---|---|---|
| Length | 1050 mm | Polyclinic (Multi-V) | 100,000 km |
| Number of ribs | 6 or 7 | PK profile | When cracks appear |
| Width | 21-22 mm | Rubber with cord | When tension is released |
| Material | EPDM with aramid cord | High temperature | Every 2 years (visual) |
It is important to consider that operating conditions in Russia are often more severe than in laboratory conditions. Winter frosts make the rubber harder, which accelerates the appearance of microcracks, and the summer heat under the hood contributes to the rapid aging of the material. Therefore, the replacement interval may need to be reduced to 60,000 - 80,000 km during active use.
⚠️ Attention: Using a belt that has expired or has visible defects is unacceptable. Belt breaks while driving Nissan Murano Z51 can cause the engine to overheat in a matter of minutes due to the pump stopping, which is guaranteed to damage the cylinder head.
The impact of service quality on the resource
The service life of the drive belt directly depends on the cleanliness of the engine compartment and the condition of adjacent components. If oil, antifreeze or brake fluid gets on the working surface of the belt, it sharply reduces the coefficient of friction and destroys the rubber. Regular engine washing should be carried out carefully, without the use of aggressive chemicals and high pressure.
It is also critical to monitor the condition of the generator pulley bearings, air conditioning compressor and rollers. A jammed bearing creates a huge load on the belt, leading to its instant break. Whenever you replace the belt, you must turn all the pulleys by hand to make sure they move smoothly without play or noise.
Regular visual inspection of belt and roller condition is the most effective way to prevent sudden implement system failure and costly engine repairs.
If you notice that the belt quickly becomes dirty or oil stains appear on it, you must immediately find and eliminate the cause of the leak. Replacing crankshaft or generator oil seals is a standard procedure that will extend the life of new consumables significantly. Ignoring leaks makes regular belt replacement an endless and expensive process.
Frequently asked questions (FAQ)
How often do you need to change the belt on your Nissan Murano Z51?
Officially, the manufacturer recommends changing the belt every 100,000 km or every 5 years. However, taking into account climatic conditions, experienced craftsmen advise replacing every 60,000 - 80,000 km or when the first signs of wear appear.
Is it possible to replace just the belt without changing the tension pulley?
Technically this is possible, but it is highly not recommended. The old roller has a worn-out bearing, which can jam and break the new belt. Replacing the set (belt + pulley) saves time and money in the long run.
What happens if the belt breaks while driving?
The car will lose power from the generator (the battery will run out in 10-20 minutes), the air conditioning and power steering will stop working. The most dangerous thing is that the cooling pump will stop, which will lead to overheating of the engine. Stop immediately and call a tow truck.
How to check belt tension without a special tool?
Press the belt between the pulleys with your finger with a force of about 10 kg. The deflection should be approximately 10-15 mm. If the deflection is greater, the belt is weakened; if it is less, it is overtightened. However, it is better to carry out an accurate check with a dynamometer.
Does the belt need to be lubricated before installation?
Absolutely not. No lubricants, oils or cleaners should come into contact with the running surface of the belt. This will cause instant slippage and failure. The belt must be completely dry and clean.