Often crossover owners Nissan Qashqai are faced with a situation when the climate system can no longer cope with the heat, and warm air begins to blow from the deflectors. In the vast majority of cases, the problem lies in failure air conditioning compressor, which is the βheartβ of the entire cooling system. Ignoring this failure can lead to more serious consequences, including contamination of the entire circuit with metal shavings and destruction of the capacitor.
The process of replacing the unit with Nissan Qashqai The first and second generations have their own technical features related to the layout of the engine compartment and the features of fastening components. To avoid unnecessary costs and mistakes during repairs, you need to clearly understand the procedure, requirements for tools and the nuances of selecting compatible spare parts.
Diagnosis of malfunction and signs of failure
Understand that the air conditioning compressor on your Nissan Qashqai requires replacement, based on a number of characteristic symptoms that appear gradually or suddenly. The most obvious sign is a lack of cold, but this can also be caused by other reasons, such as a freon leak or a faulty pressure sensor. Therefore, before going to the store for spare parts, it is worth conducting a thorough visual and instrumental diagnostics.
Pay attention to extraneous noises that appear when the climate system is turned on. If you hear a strong hum, grinding or knocking noise coming from the engine area, this is a sure sign that pulley bearing or the internal parts of the compressor are worn out. In some cases, there may be no noise, but the clutch will stick, causing the alternator belt to smoke and smell like burnt rubber.
- π« Complete absence of cold air when the interior fan is running
- π Creaking, whistling or metallic grinding sound when the air conditioner is turned on
- π’οΈ Traces of oil in the compressor area or on surrounding parts
- π¨ Clutch crackling when trying to start the compressor
It is important to note that on Nissan Qashqai With diesel engines, the load on the compressor is higher due to the nature of the cooling system, which can accelerate wear on the unit. If diagnostics confirm a malfunction of the compressor itself, it is necessary to act quickly, since operating the system with a faulty unit can lead to its complete jamming.
β οΈ Caution: If the compressor seizes, the belt may fly off or break, causing the alternator and power steering pump to stop working. Do not try to drive such a car with the air conditioning on!
Choosing a new spare part: original or analogue
When choosing a new compressor for Nissan Qashqai owners often face a dilemma: buy an original unit or save on a high-quality analogue. Original compressor supplied under the brand Nissan or Denso, is guaranteed to fit all sizes and characteristics, but its price may be significantly higher than the market average. This is especially true for second generation models (J11), where the cost of the original part reaches impressive amounts.
High-quality analogues from well-known global manufacturers, such as Sanden, Hayes or GPD, often offer comparable build quality at a more affordable price. The main condition is to ensure full compatibility by article number and type of refrigerant. For modern Nissan Qashqai freon is used R134a, and on the newest models can be used R1234yf, which requires completely different types of compressors.
- β Check the markings on the old compressor before purchasing
- β Make sure all necessary fasteners and pulley are included
- β Compare the volume of oil poured into the new unit with the old one
- β Give preference to brands with a proven reputation in the market
Particular attention should be paid to the type of drive: on some modifications Nissan Qashqai Compressors with an electromagnetic clutch are used, and on others - with an electric drive, where control is carried out by a control unit. Selecting the wrong drive type will make installation impossible or ineffective.
- Original Nissan/Denso
- High-quality analogue (Sanden/Hayes)
- Used unit
- I haven't decided yet
Necessary tools and preparation for work
Replacing the compressor with Nissan Qashqai - This is a complex process that requires specialized equipment and skills in working with the air conditioning system. You don't need a ton of plumbing tools, but without professional equipment for working with freon, it is impossible to carry out repairs. Replacing it yourself without a vacuum station and pressure gauges will result in air and moisture entering the system, which will kill the new compressor within a few days.
You will need a lift or pit as the compressor is often accessed from below, especially if the crankcase guard or subframe needs to be removed. Be sure to prepare a set of sockets, keys, a torque wrench for tightening the mounting bolts, and a surface degreasing agent. Don't forget about gloves and goggles, as working with freon requires compliance with safety precautions.
βοΈ Preparing to replace the compressor
Removing the old unit may require the removal of additional components, such as radiator hoses, the alternator, or even the air conditioning radiator, depending on the year and engine type. On Nissan Qashqai With a 1.6 or 2.0 engine, the space under the hood is quite tight, so care when disconnecting the pipes is critical.
β οΈ Attention: Never unscrew the air conditioning system pipes in a garage without first releasing the pressure! Freon under high pressure can cause serious burns.
Step-by-step instructions for replacing the compressor
The first step is the complete evacuation of the refrigerant from the system at a specialized stand. After this, you must disconnect the negative terminal of the battery to de-energize the system and avoid a short circuit when disconnecting the electrical connectors. Next, remove the engine protection and, if necessary, dismantle the radiators to gain access to the compressor mounting bracket.
Unscrew the pulley mounting bolts and remove the accessory drive belt. Be extremely careful not to damage the pulley or tensioner. After this, disconnect the clutch control electrical connector and unscrew the high and low pressure pipes. Immediately close the holes in the tubes and on the compressor itself with plugs to prevent dust and moisture from getting inside.
Installing a new compressor is done in the reverse order. It is important to fill the new unit with the exact amount of oil specified by the manufacturer, as the factory filling may not meet the requirements of your system. If there were a lot of metal shavings in the old compressor, it is necessary to flush the entire circuit and replace the receiver-dryer, otherwise the new unit will quickly fail.
Before installing a new compressor, check the condition of the pulley and belt tensioner. A worn tensioner can lead to repeated failure of the new unit due to vibrations and belt slippage.
The importance of flushing the system and replacing filters
If the compressor fails due to internal failure, there will inevitably be metal and dirt particles in the system. Simply replacing the compressor without cleaning the circuit will cause the new unit to quickly become clogged and break down again. Therefore, a mandatory step is to flush the entire system with a special solvent for air conditioners.
Pay special attention to the receiver-dryer. This device is designed to clean freon from moisture and impurities. After the compressor is destroyed, it loses its properties and must be replaced. Saving on this part is one of the most common reasons for repeated breakdowns of the air conditioning system.
| Component | Action | Cause |
|---|---|---|
| Receiver-dryer | Replacement | Accumulation of moisture and debris |
| System tubes | Flushing | Removing metal shavings |
| Capacitor | Flushing or replacement | Risk of channel clogging |
| Compressor oil | Complete replacement | Removing wear debris |