The gas distribution system is the heart of any modern engine, and for models Nissan Qashqai with series engines HR16DE or M9R its serviceability is critical. The tension roller is responsible for maintaining optimal belt tension, and its failure can lead to catastrophic consequences, including the death of the motor. Owners often ignore symptoms until a characteristic noise appears, which greatly complicates repairs.
The replacement procedure requires not only the availability of tools, but also a deep understanding of the timing drive design. Incorrect installation can cause the belt to jump one tooth, disrupting valve timing and causing loss of power. In this article we will look at all the nuances of working with tension roller on popular versions of the crossover.
Symptoms of malfunction and diagnostics of the roller
You can identify the problem at an early stage by specific sounds emanating from the timing drive area. If you hear a high-frequency whistle or metallic clanging sound when starting a cold engine, this is the first indication that the bearing tension roller began to collapse. The sound may disappear when the engine is warm, but this does not mean that the problem has disappeared - it has only become less noticeable.
In addition to acoustic signals, you should pay attention to the condition of the belt itself. If you see traces of oil, cracks or delamination of rubber, this is often the result of a worn roller that has ceased to hold the belt in plane. Visual inspection requires removal of plastic covers and can be difficult due to the cramped engine compartment.
Diagnostics also includes checking for play. With the belt removed, try to rock the roller by hand. Any beating or jamming when the shaft rotates indicates the need for immediate replacement. Ignoring these signs may result in the belt breaking while driving on the highway.
β οΈ Warning: If you hear metal grinding on metal, stop using the vehicle immediately. This is a sign that the roller bearing is seized and the belt can be ground into threads in a matter of seconds.
- π The appearance of a whistle during a cold engine start, especially in wet weather.
- π§ A metallic clang or hum that changes tone as the speed changes.
- π Visual traces of grease on the roller body or dust from the bearing.
- βοΈ Engine vibration caused by uneven belt tension.
Selection of original parts and high-quality analogues
When choosing a spare part for Nissan Qashqai It is important to understand the difference between the original product and analogues. Original tension roller (OEM number depends on the year of manufacture and engine, for example, 13070-1YV0A for some versions) guarantees compliance with all factory tolerances and service life. However, the price of such parts is often inflated by dealers.
There are many trusted manufacturers who supply high-quality components, often even exceeding the original in terms of service life. Such brands include Gates, INA, SKF and Continental. When purchasing a timing kit, make sure that it includes not only a pulley, but also water pump (pump), since it is recommended to replace them at the same time.
You should not skimp on this detail by buying unknown Chinese brands. A cheap bearing can fall apart after only 10-15 thousand kilometers, which will lead to repeated expensive repairs. Always check the packaging for holograms and quality certificates.
- Original Nissan
- Gates/Continental
- INA/SKF
- Budget analogues
| Brand | Product type | Average resource (km) | Note |
|---|---|---|---|
| Nissan (OEM) | Roller assembly | 120 000+ | Ideal geometry, high price |
| Gates | Timing kit | 100 000+ | Gold standard of quality |
| INA | Video clip | 90 000+ | German brand, often goes to OEM |
| SKF | Video clip | 90 000+ | Excellent value for money |
Necessary tools and preparation
Before you begin, you need to prepare the entire set of tools. Replacing the roller with Qashqai requires access to the drive, which is often covered with plastic shields and other components. You will need keys for 10, 12, 14, 17 and 19, as well as a socket for removing the crankshaft pulley.
Pay special attention to the belt tensioning tool. Some engines use a special hex wrench, others use a ratchet wrench. Without the right tool, you will not be able to release the tension on the belt without damaging the mechanism. Also, do not forget about the jack and stand, as it is often necessary to remove the right wheel and fender liner protection.
Prepare a clean rag and degreasing agent. Before installing a new roller, the surface of the engine block must be perfectly clean to avoid dirt getting into the new bearing. It is also worth purchasing a new timing belt, since the old one, removed under tension, can quickly fail when reinstalled.
- π¨ Set of sockets and ratchets (including extensions).
- π Special key for the tensioning device (if provided by the design).
- π οΈ Torque wrench for tightening bolts to the correct torque.
- π§Ό Carburetor cleaner or solvent to remove dirt.
β οΈ Attention: Be sure to loosen the crankshaft pulley bolt before jacking up the vehicle. With the engine running, this bolt is tightened with a huge torque, and it will be extremely difficult to remove it.
Step-by-step replacement instructions
The replacement process begins with removing the plastic engine covers and crankcase protection. Then you need to remove the right front wheel and fender liner to gain access to the crankshaft pulley. Unscrew the pulley mounting bolt and carefully remove it. If the pulley is tight, use a puller, but do not hit it with a hammer.
The next step is to remove the alternator belt (if it is common) and dismantle the engine mount or part of it if it interferes with access to the drives. Set the piston of the first cylinder to TDC (top dead center). This is critical for correct phase installation. Align the marks on the camshaft and crankshaft gears.
Loosen the tension roller bolt using a special wrench or wrench. When the tension eases, remove the belt from the pulleys. Install a new roller, having first lubricated its bearing (if the design provides for this, but more often they are maintenance-free). Install the belt, observing the tension sequence.
βοΈ Preparation for replacement
Tighten the tension pulley bolt to the recommended torque. On many models Nissan this value is about 40-50 Nm, but you need to look at the exact numbers in the service book. After this, check that all marks match again by turning the crankshaft two full turns by hand.
β οΈ Attention: Never crank the engine with the starter while checking the marks. Only use the wrench on the crankshaft to prevent the belt from accidentally jumping.
What to do if the labels do not match?
If the marks do not match when checking, then the belt is installed incorrectly. It is necessary to remove the belt, move it one tooth in the desired direction and check again. Ignoring this step will cause the valves to sag at startup.
Reassemble all components in reverse order. Install the crankshaft pulley, tighten its bolt with great force. Replace the engine guard, fender liner and wheel. Start the engine and listen to the operation. The sound should be smooth, without extraneous noise.
Correct placement of tags is 90% of success. Even a slight displacement can lead to irregular valve timing and a drop in engine power.
Typical repair mistakes
One of the most common mistakes is trying to replace only the roller, leaving the old belt. The old belt has a stretched structure and may not provide the necessary tension for the new roller. This will lead to slippage and rapid failure of both units. Always replace the belt and rollers as a set.
Another mistake is improper tightening of the roller mounting bolt. If you overtighten the bolt, you can deform the bearing housing or break the threads in the block. If you donβt tighten it enough, the roller will start to play and quickly fail. Use a torque wrench and refer to the instructions.
Some technicians ignore checking the condition of the crankshaft and camshaft pulleys. If the pulleys have wear or nicks, the new belt and roller will quickly become unusable. In such cases, it is necessary to replace the pulleys to ensure long service life of the system.
- β Replacement of only the roller without a new timing belt.
- β Ignoring the condition of the pulleys and replacing them when worn.
- β Using an impact wrench to tighten critical bolts.
- β Neglecting to check labels after installation.
Cost of work and savings
Replacing a tension roller at a service center can cost from 5,000 to 15,000 rubles, depending on the region and the difficulty of access to the engine. On engines M9R (diesel) work may be more expensive due to the need to remove additional components. If you have the skills of a locksmith, doing the replacement yourself will save you a significant amount of money.
The main costs will be for spare parts. A timing kit with rollers and a pump from a quality manufacturer will cost 8,000-15,000 rubles. If you buy only the roller, the savings will be minimal and the risk of re-repair will be high. Therefore, it is more rational to buy a complete set.
Regular maintenance according to regulations (every 90-100 thousand km) will avoid sudden breakdowns. Do not expect noise to appear if the mileage is close to the scheduled replacement interval. Prevention is always cheaper than engine repair after a broken belt.
Keep receipts for the purchase of spare parts and photos of the replacement process. This will be useful when selling the car, as the buyer will see that the maintenance was carried out efficiently and on time.
FAQ: Frequently asked questions
How long does it take to replace a roller?
On average, replacing a timing belt kit with a pulley takes from 3 to 5 hours for an experienced technician. For a beginner, this process can take all day, as it will take more time to study the instructions and find the marks.
Is it possible to replace the roller without removing the crankshaft pulley?
On most models Nissan Qashqai This is not possible since the belt goes through the crankshaft pulley. Without removing it, the belt cannot be removed, which means the roller cannot be replaced. The exception is some older modifications, but this is rare.
Do I need to change the alternator belt when replacing the timing belt?
If the alternator belt is in the access area and shows signs of wear, it is better to replace it immediately. This will save time on subsequent analysis, since access to it is often blocked by the same elements as the timing belt.
How often should the tension roller be replaced?
Replacement regulations for Nissan Qashqai usually 90,000 km or 5 years, whichever comes first. However, if there is evidence of noise or play, replacement should be made immediately.
What happens if the labels are mixed up during installation?
If the marks are shifted even by one tooth, the engine will lose power, begin to operate unstably, and during startup the pistons may hit the valves, which will lead to a major overhaul of the engine.