Engine compartment <em>Nissan Almera</em>: structure, diagnostics and care

Engine compartment Nissan Almera - this is the “heart” of the car, where the key units are concentrated, on which the reliability and durability of the car depends. Owners Almera N16, G15 or Tino (depending on the generation) are often faced with questions: how to properly maintain the engine, where the main components are located, and what to look for when doing self-diagnosis? This article will help you understand the structure of the engine compartment, identify weak points and avoid costly repairs.

We will take a detailed look at the layout of the engine compartment for different generations Almera, we will point out typical problems (for example, oil leakage from under the valve cover or engine overheating HR16DE), and also give practical advice on care. We will pay special attention cooling system, electrical And attaching attachments — car owners pay insufficient attention to these components, which leads to breakdowns.

Engine compartment design: diagram and main components

Engine compartment Nissan Almera varies depending on generation and engine type. For example, in Almera Classic (N16) with motor QG15DE the layout is simpler than in Almera G15 with HR16DE or K4M (Renault). However, the general structure remains similar:

• 🔧 Engine — the core of the compartment, surrounded by attachments (generator, air conditioning compressor, power steering pump).
• 🔥 Cooling system: radiator, fan, expansion tank and pipes.
• ⚡ Electrics: battery, fuse box, ECU (electronic control unit).
• 🛢️ Fluid systems: brake fluid reservoirs, washer fluid reservoirs, oil dipstick.
• 🔗 Mounts and cushions - dampen engine vibrations.

The photo below shows a typical circuit for Almera G15 (2013–2019) with engine HR16DE:

Almera G15 engine compartment diagram

The image shows that the battery is located on the left (in the direction of travel), and the coolant expansion tank is on the right next to the radiator. The oil dipstick is located at the front of the engine, next to the timing belt.

It is important to consider that in Almera Classic (until 2012) the layout is different: for example, the battery may be hidden under a plastic cover, and access to the spark plugs is difficult due to the design of the intake manifold. If you are the owner Almera Tino (with engine QR20DE), please note reinforced engine mountings - they fail more often due to the greater weight of the motor.

Typical engine compartment problems Nissan Almera

Even when treated with care, the engine compartment Almera requires intervention over time. Let's look at the most common problems:

1. Oil leak from under the valve cover - typical for engines HR16DE And QG15DE after 100,000 km. Reason: wear of the gasket or deformation of the cover due to overheating.
2. Engine overheating - often associated with a malfunctioning thermostat or a clogged radiator. B Almera G15 weak point is pump, which can jam without preliminary symptoms.
3. Cracks in the cooling system pipes - especially relevant for cars older than 5 years. Pipes become brittle due to high temperatures.
4. Oxidation of battery contacts and fuse box — leads to unstable operation of electronics (for example, power windows or climate control fail).
5. Engine mount wear - manifested by vibration at idle speed. B Almera Tino this is more critical due to the heavy motor QR20DE.

Important: B Almera G15 with engine HR16DE After the 2015 model year, a defect in the camshaft position sensor is often found. Its malfunction results in an error P0340 and unstable engine operation at idle.

⚠️ Attention: If you notice that the engine oil level is dropping faster than usual, but there is no puddle under the car, check the condition breather (crankcase ventilation system). B Almera Classic it often gets clogged, which leads to increased pressure and oil being squeezed out through the gaskets.

How to conduct self-diagnosis?

Regular inspection of the engine compartment will help identify problems early. Here are step-by-step instructions for owners Nissan Almera:

Check the oil level (the dipstick should be clean and free of metal shavings)

Inspect the cooling system pipes for cracks and leaks

Make sure the expansion tank cap holds pressure (there should be no hissing sound when pressed)

Check the condition of the timing belt (on HR16DE it requires replacement every 90,000 km)

Clean the battery terminals from oxidation (use a brush and soda solution)

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For deeper diagnostics, you will need an error scanner (for example, ELM327). Connect it to the socket OBD-II (located under the steering wheel) and check the fault codes. Common mistakes for Almera:

Error code	Description	Possible reason	Recommendations
P0300	Multiple Cylinder Misfire	Misfire in several cylinders	Check spark plugs, ignition coils, compression
P0171	System Too Lean (Bank 1)	Lean air-fuel mixture	Inspect the mass air flow sensor (MAF), check for air leaks
P0420	Catalyst System Efficiency Below Threshold	Low catalyst efficiency	Check the lambda probes, the catalyst may be worn out
P0340	Camshaft Position Sensor Circuit Malfunction	Camshaft sensor malfunction	Replace the sensor (if HR16DE this is a weak point)

If you find an error P0420, do not rush to change the catalyst. B Almera G15 this problem is often associated with malfunction of the second lambda probe (after the catalyst). Try resetting the error and checking for it to reappear after 100–200 km.

Engine compartment maintenance: step-by-step instructions

To the engine compartment Nissan Almera served for a long time, adhere to the following recommendations:

1. Changing oil and filters

For engines HR16DE And QG15DE oil recommended 5W-30 or 5W-40 (synthetic or semi-synthetic). Replacement interval - every 10,000 km (or once a year). When operating in difficult conditions (dust, frequent traffic jams), reduce the interval to 7,000 km.

Replacement algorithm:

1. Warm up the engine to operating temperature (the oil will become less viscous).
2. Unscrew the drain plug on the pan (key 14).
3. Drain the old oil (use a container with a capacity of at least 4 liters).
4. Replace the oil filter (to HR16DE it is located to the right of the engine).
5. Pour new oil through the neck, checking the level using the dipstick.

2. Flushing the cooling system

Coolant in Almera it is recommended to change every 60,000 km or once every 3 years. Use antifreeze Nissan Coolant L250 (green) or analogues (CoolStream A-110). Flushing the system is mandatory when changing the type of fluid!

For washing:

• Drain the old antifreeze through the faucet on the radiator.
• Fill with distilled water with a flushing additive (for example, LIQUI MOLY Kuhler-Reiniger).
• Start the engine and let it run for 10–15 minutes.
• Drain the water and repeat the procedure with clean water.
• Fill in new antifreeze, not forgetting to bleed the system (open the heater tap to maximum).

⚠️ Attention: B Almera G15 installed after 2016 release plastic thermostat, which often jams. When replacing antifreeze, check its operation: when it warms up to 85–90°C, the upper radiator pipe should become hot. If not, the thermostat is faulty.

Repair and replacement of components: what can you do yourself?

Some work in the engine compartment Nissan Almera available for independent implementation even without deep knowledge of car repair. Let's look at the most common procedures:

1. Replacing the timing belt

On engines HR16DE And QG15DE The timing belt requires replacement every 90,000 km. If the belt breaks HR16DE the valve bends, so you can’t ignore the regulations! To replace you will need:

• 🔧 A set of keys and sockets (including a special key for the tension roller).
• 🔗 New timing belt, rollers (tensioner and bypass), pump (recommended to be changed at the same time).
• 📏 Retainers for camshafts (to avoid displacement of marks).

Step by step instructions:

Detailed instructions for replacing the timing belt

1. Remove the right front wheel and plastic fender liner.

2. Remove the alternator belt and crankshaft pulley.

3. Set the piston of the 1st cylinder to TDC (the marks on the crankshaft and camshaft pulleys must match).

4. Loosen the tension roller and remove the old belt.

5. Install a new belt, starting with the crankshaft, then camshafts, pump, rollers.

6. Tension the belt using the tension roller (the deflection should be 5–7 mm when pressed with your finger).

7. Rotate the crankshaft 2 turns and make sure that the marks match.

2. Replacing spark plugs

Candles on Almera serve 30,000–50,000 km (depending on type). For HR16DE candles fit NGK PLZFR6A-11 or Denso K16TT. When replacing:

• Disconnect the high-voltage wires (pull the cap, not the wire!).
• Unscrew the spark plugs with a 16 mm spark plug wrench.
• Check the gap (should be 1.0–1.1 mm).
• Install new spark plugs, tightening firmly 20–25 Nm.

Important: If after replacing the spark plugs the engine stalls, check ignition coils. B Almera G15 they often fail after 100,000 km.

Engine compartment modernization: tuning and improvements

Engine compartment Nissan Almera can be modified to improve reliability or improve appearance. Let's look at popular improvements:

1. Installation of additional cooling

If you drive your car in a hot climate or frequently sit in traffic jams, consider:

• 🌡️ Additional radiator fan (installed in front of the main one).
• 🔥 Heat-resistant hood insulation (e.g. Thermo-Tec).
• 🚗 Replacing the standard radiator with an aluminum one (for example, from Nissan Juke).

2. Electrical optimization

Weak point Almera is standard wiring, especially at contact points. To improve:

• ⚡ Replace the standard battery terminals with brass.
• 🔌 Install an additional fuse box to connect equipment (for example, a DVR).
• 📡 Lay a separate positive wire from the battery to the amplifier (if a powerful audio system is installed).

3. External tuning

For aesthetics, the engine compartment can be:

• 🎨 Paint the engine cover in the body color.
• 🔧 Install decorative linings on tanks (for example, made of carbon fiber).
• 💡 Replace the standard engine compartment lighting lamps with LED.

⚠️ Attention: When installing additional equipment (such as a second battery), make sure that it does not overload the generator. B Almera G15 the standard generator produces 90 A - this is enough for the basic configuration, but may not be enough for a powerful audio system.

Frequently asked questions (FAQ)

How often should you check the engine oil level? Almera?

It is recommended to check the oil level every 1,000 km or before a long trip. B Almera G15 with engine HR16DE Oil consumption of up to 500 ml per 10,000 km is considered normal. If the consumption is higher, diagnostics are required (the oil seals or piston rings may be worn out).

Is it possible to pour another brand of antifreeze into Almera?

Mix different types of antifreeze (for example, green and red) not recommended, as this may cause sediment to form and block the channels. If topping up is required, use distilled water (no more than 200 ml) or antifreeze of the same brand. When completely replacing the system, be sure to flush it.

Why in the engine compartment? Almera Classic does it smell like gasoline?

The smell of gasoline may indicate:

• Leaking fuel lines (check the hoses near the fuel filter).
• Leaking injectors (especially important for engines QG15DE after 150,000 km).
• The adsorber is faulty (the purge valve may be stuck in the open position).

If the smell is strong - don't start the car until the cause is eliminated (risk of fire!).

What oil is better to pour into the engine? HR16DE?

For HR16DE oils with approval are suitable API SN or ILSAC GF-5. Optimal options:

• Nissan Strong Save X E 5W-30 (original).
• Mobil 1 ESP 5W-30 (fully synthetic).
• Liqui Moly Special Tec AA 5W-30 (for Asian engines).

Avoid high viscosity oils (such as 10W-40) as they impair cold starting.

How to remove the plastic cover of the engine compartment in Almera G15?

The lid is attached to 4 plastic clips. To remove it:

1. Open the hood and find the clips at the corners of the lid.
2. Carefully pry up the clips with a flat-head screwdriver (starting from the front).
3. Lift the cover up and it will release from the latches.

When installing, make sure that the clips are in place, otherwise the cover will rattle.