Air conditioner compressor bearing Nissan Almera G15 - one of those parts that wears out faster than other elements of the system. A characteristic hum or whistle when the air conditioner is turned on indicates the need for diagnostics, and ignoring the problem can lead to jamming of the compressor and costly repairs. In this article we will look at how replace the bearing yourself without contacting service, saving up to 8,000 rubles.

The procedure requires accuracy and basic skills in working with tools, but is quite doable in a garage environment. The main thing is to choose the right spare part (original or high-quality analogue), prepare the workplace and follow the step-by-step instructions. We have taken everything into account specific nuances of the G15 model, including the location of the compressor, the type of fastenings and the features of removing the drive belt.

Signs of a bad air conditioner bearing

The first symptoms of bearing wear are often confused with problems with the alternator or belt tensioner. However, Almera G15 There are characteristic signs that help to accurately identify the source of noise:

  • 🔊 Hum or howl when the air conditioner is turned on, which increases with increasing engine speed. The sound may disappear when the climate control is turned off.
  • 🌀 Vibration on the steering wheel or body, especially noticeable at idle. This is due to the runout of the compressor pulley.
  • 🔥 Overheating compressor - if you touch it after a trip, the housing may be hot (normal temperature is up to 60°C).
  • 🛑 Jamming pulley - in advanced cases, the belt begins to slip or break.

On Nissan Almera G15 with engines HR16DE And K4M The air conditioning compressor bearing fails after an average of 80–120 thousand kilometers. Accelerate wear:

  • 🌡️ Frequent operation of the air conditioner in maximum cooling mode (high pressure in the system).
  • 🚗 Off-road driving or frequent exposure to water on the pulley (corrosion).
  • ⚠️ Using non-original belts with increased tension.
⚠️ Attention: If the bearing begins to “crunch” or a metallic grinding sound appears, this is a signal of destruction of the separator. In this case, the compressor may jam at any time, which will lead to a broken belt and possible damage to other units (generator, power steering).
📊 How often do you turn on the air conditioning in your Nissan Almera?
  • Only in summer
  • All year round
  • Somewhat, only in the heat
  • I hardly use it

Which bearing to choose: original vs analogues

For Nissan Almera G15 (2012–2018) the following types of bearings are suitable:

Part type Article Manufacturer Price, rub. Notes
Original 27310-4M000 Nissan 3 200–4 500 Best quality, but high cost. The kit includes a seal.
Analogue (premium) VKBA 3505 SKF 1 800–2 300 The best option in terms of price/quality ratio. Suitable for 90% of cases.
Analog (budget) 6202-2RS NSK/KOYO 600–1 200 Requires runout testing. Often counterfeited!
Kit with oil seal 27310-4M010 Nissan (OEM) 3 800–5 000 Includes bearing + pulley seal. Recommended for heavy wear.

When choosing an analogue, pay attention to:

  • 🔍 Marking - must match 6202-2RS (closed type with rubber seals).
  • 📦 Packaging - original SKF/NSK have a hologram and serial number.
  • 🌀 Backlash — check the rotation of the bearing in the store (it should rotate smoothly, without jamming).

If you are purchasing a part online, ask the seller for a photo of the packaging with markings. Counterfeits often come in plastic bags without logos.

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Before purchasing, remove the old bearing and compare its markings with the new part. Even original spare parts may have different part numbers depending on the year of manufacture Almera G15 (pre-restyling/restyling).

Tools and preparation for replacement

To work you will need:

Socket set (10, 12, 14 mm)|Ratchet wrench with extension|Bearing puller (or vise)|Hammer and wood spacer|Torque wrench (optional)|Flat head screwdriver|New bearing and seal (if needed)|Bearing lube (eg. Molykote BR2)-->

Also prepare:

  • 🧰 Wheel chocks - for fixing the rear wheels.
  • 🔧 Jack and stand — the front part of the car will need to be raised.
  • 🧹 Rags and cleaner - the compressor and pulley will be dirty.
  • 📸 Smartphone — take photographs of the location of the belt and fasteners before dismantling.

Before starting work:

  1. Disconnect the negative terminal of the battery (to avoid short circuit).
  2. Relieve the pressure in the air conditioning system (if the compressor has not been removed previously). To do this, press the service port valve (on the low pressure pipe) with a screwdriver - the gas will release in 10-15 seconds.
  3. Loosen the accessory belt tensioner (use a 14 mm wrench to turn the pulley counterclockwise).
⚠️ Attention: If you have never worked with air conditioning systems, do not try to completely depressurize the circuit! B Almera G15 refrigerant used R-134a, and its leak requires subsequent refueling at a service station (cost ~2,500 rubles). It is enough to relieve the pressure to atmospheric pressure.

Step-by-step instructions for replacing a bearing

The replacement process can be divided into 3 stages: dismantling the compressor, replacing the bearing and reassembling. Let's look at each of them.

1. Removing the air conditioning compressor

On Nissan Almera G15 The compressor is located at the bottom of the engine, next to the generator. To remove it:

  1. Loosen the belt tensioner bolt (12 mm socket) and remove the belt.
  2. Unscrew the 4 bolts securing the compressor to the bracket (10 mm socket). Don't lose pucks!
  3. Disconnect the electrical connector of the compressor clutch (press the lock and pull up).
  4. Carefully remove the compressor without turning it over (to prevent oil from leaking out).

If the compressor is stuck to the bracket, do not hit it with a hammer! Use a puller or wooden spacer.

2. Replacing the pulley bearing

The most critical stage. You will need a puller or vice. Procedure:

  1. Clamp the compressor pulley in a vice through soft spacers (for example, wooden blocks).
  2. Using a puller or a hammer with a spacer, knock down the retaining ring holding the bearing.
  3. Press out the old bearing by striking the inner race (not the outer!).
  4. Clean the seat from dirt and lubricant residues.
  5. Install the new bearing, pressing it evenly using a mandrel (you can use the old bearing as a spacer).
  6. Fix the locking ring and check the rotation of the pulley - it should be smooth, without play.

If you are also replacing the oil seal, lubricate it with thick lubricant (for example, Liqui Moly Silicon-Fett) before installation.

What to do if the bearing does not press out?

If the bearing is stuck and cannot be pulled out, try the following:

1. Heat the pulley with a hair dryer (temperature ~100°C) - the metal will expand.

2. Spray the area generously with WD-40 and let sit for 10-15 minutes.

3. Use a three-jaw puller to tighten the bolt evenly.

4. As a last resort, carefully cut the inner race of the bearing with a hacksaw (without touching the pulley!).

3. Assembly and testing

After replacing the bearing:

  1. Install the compressor in place, tightening the mounting bolts to a torque of 20–25 Nm.
  2. Put on the accessory belt and adjust the tension (belt deflection should be 5-7 mm when pressed with a finger).
  3. Connect the electrical connector of the compressor clutch.
  4. Connect the battery terminal and start the engine.

Check the system operation:

  • 🔧 Turn on the air conditioner to maximum airflow. There may be increased noise for the first 1–2 minutes (this is normal - the oil is distributed throughout the system).
  • 👂 Listen to extraneous sounds. If the hum disappears, the bearing is installed correctly.
  • 📉 Check the pressure in the system with a pressure gauge (normal: low pressure - 1.5-2.5 bar, high - 12-18 bar at 20°C).
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If the air conditioner does not turn on after replacing the bearing, check the fuse F33 (10A) in the block under the hood and the compressor clutch relay (located next to the fuse box).

Common mistakes and how to avoid them

Even experienced technicians sometimes make mistakes when replacing a compressor bearing. Here are the most common ones on Nissan Almera G15:

  • 🔨 Bearing misalignment during pressing - leads to premature wear. Always use a mandrel that applies even pressure to the outer race.
  • 🛠️ They forget about the oil seal - if it is worn out, oil will leak out and the compressor will quickly fail.
  • 🔧 Incorrect belt tension — weak tension leads to slippage, strong tension leads to bearing overload.
  • ⚡ Short circuit when connecting the coupling - Always disconnect the battery before working with electrical equipment!

Another typical problem is dirt getting inside the compressor. To avoid this:

  • Wash the pulley and bearing seat with gasoline or carburetor cleaner.
  • Do not place the compressor on the ground - use a clean rag or table.
  • Before installing a new bearing, apply a thin layer of grease to the seat.
⚠️ Attention: If the air conditioner works after replacing the bearing, but the cooling is poor, air may have entered the system. In this case, evacuation and refilling of the refrigerant will be required (contact a service station with equipment for R-134a).

Cost of work in the service vs self-repair

Prices for replacing an air conditioner compressor bearing in services vary greatly depending on the region and level of the service station. Average prices for Nissan Almera G15 (for 2026):

Type of work Cost, rub. Lead time
Air conditioning system diagnostics 800–1 500 30–60 min
Replacing the compressor bearing (without refilling) 3 500–6 000 2–3 hours
Replacing bearing + oil seal 4 000–7 000 3–4 hours
Air conditioner refill (1 kg R-134a) 2 000–3 500 40–60 min

When repairing yourself, your costs will be limited to the cost of spare parts:

  • Bearing - 600–4,500 rub.
  • Oil seal (if necessary) - 300–800 rubles.
  • Lubricant - 200–500 rub.

Total: from 1,100 to 5,800 rub. versus 5,500–10,000 rub. in the service. The savings are obvious, but remember: if you have never held a bearing puller in your hands, it is better to entrust the work to professionals.

FAQ: Answers to frequently asked questions

Is it possible to drive with a humming compressor bearing?

Short-term - yes, but no more than 1-2 weeks. Driving for a long time with a worn bearing leads to:

  • Destruction of the compressor pulley.
  • Broken accessory belt (which can damage the generator or power steering).
  • Compressor jamming and drive belt damage.

If the bearing begins to “crunch,” movement is prohibited!

How to check that the hum is coming from the compressor bearing and not from the generator?

It is easy to distinguish the source of the hum:

  1. Start the engine and listen to the noise.
  2. Turn on the air conditioner. If the hum gets louder, the problem is in the compressor.
  3. Turn off the air conditioner. If the hum disappears, the compressor bearing is at fault.

The generator is characterized by constant noise, independent of the operation of the climate control.

Do I need to refill the air conditioner after replacing the bearing?

If you not disconnected high/low pressure tubes and didn't drain refrigerant - no refilling required. It is enough to release excess pressure through the service port.

If the tubes were disconnected or the compressor was dismantled for a long time, evacuation and refueling will be required (cost ~2,500 rubles).

What oil should I fill into the compressor after replacing the bearing?

B Nissan Almera G15 oil is used ND-OIL 8 (or equivalent PAG-46). The volume for refilling is 30–50 ml (depending on the amount of lost oil).

Attention: do not mix different types of oils (for example, PAG and POE)!

What should I do if, after replacing the bearing, the compressor clutch does not turn on?

The reasons may be as follows:

  • Faulty clutch relay (check fuse F33 and relay K30 in the block under the hood).
  • Broken wiring or oxidation of contacts in the coupling connector.
  • Low refrigerant pressure (even with a serviceable bearing, the clutch will not turn on if there is little freon in the system).
  • Defective pressure sensor (located on the high pressure pipe).

For diagnostics, connect the ELM327 scanner and check for errors using the protocol CAN (codes P0530, P0533 indicate problems with the coupling).