Replacing the <em>Nissan Almera N16</em> valve cover gasket: a detailed guide with photos and tips

Nissan Almera N16 — a reliable car, but even its rubber parts wear out over time. One of the most common problems is oil leak through valve cover gasket. If you notice oil leaks on the cylinder block or the smell of burnt oil in the engine compartment, it's most likely time for a replacement.

In this article we will look at how Replace the valve cover gasket yourself on Almera N16 with engines QG15DE (1.5 l) and QG18DE (1.8 l). The procedure does not require special skills, but there are nuances that many people forget about. We'll tell you what tools you'll need, how to avoid mistakes, and what to pay attention to during assembly.

Signs of valve cover gasket wear

The valve cover gasket is a sealing element that prevents oil from leaking from the cylinder head. Over time, the rubber loses its elasticity, cracks or “tans,” which leads to oil leakage. Here are the main symptoms that indicate the need for replacement:

• 🔧 Oil stains on the side walls of the cylinder block or around the valve cover. Most often they are noticeable after a long stay.
• 💨 Burnt oil smell in the engine compartment, especially when the engine is warm. This happens when oil gets on hot parts.
• 🛢️ Reducing oil level for no apparent reason (no leaks from under the crankcase or seals). If you have to top up more often than usual, check the gasket.
• 🔥 Smoke from under the hood during intense driving. This is a sign that oil is getting into the exhaust manifold.

On Nissan Almera N16 The valve cover gasket usually serves 80–120 thousand km, but the period depends on operating conditions. If the car is often stuck in traffic jams or driven in a hot climate, the tires age faster. The quality of the oil also affects wear: aggressive additives can corrode the seal.

⚠️ Attention! If you ignore the leak, oil can get onto the timing belt. On Almera N16 with engine QG18DE this is fraught with its slippage or breakage, which will lead to bending of the valves. Don't delay repairs!

Which gasket to choose: original or analogue?

When replacing the valve cover gasket with Nissan Almera N16 You can use both original parts and high-quality analogues. Here's what the market offers:

Part type	Article	Manufacturer	Notes
Original	13270-4M000 (1.5 l) 13270-95X00 (1.8 l)	Nissan	Best quality, but high price (from 1500 rubles). Suitable for precision fit.
Analogue (premium)	132704M000 / 1327095X00	Ajusa, Elring, Reinz	The quality is close to the original, the price is 800–1200 rubles. Popular with craftsmen.
Analog (budget)	Check by VIN	Corteco, Victor Reinz	Price starts from 400 rubles, but there may be problems with fit. Suitable for temporary replacement.
Kit with bolts	13270-4M005	Nissan	Includes gasket + 16 mounting bolts. Recommended for first replacement.

If you choose analogue, pay attention to gasket material:

• 🔹 Rubber - cheap, but last less (up to 50 thousand km). They can tan in the cold.
• 🔹 Silicone — elastic, withstands temperature changes. The best option for Almera N16.
• 🔹 Cork - are rare for this model, but seal well.

Important: on engines QG18DE after 2003, a modified gasket with metal inserts was installed (article no. 13270-95X0A). It is more expensive, but lasts longer.

Tools and materials for replacement

To replace the valve cover gasket with Nissan Almera N16 You don’t need a specialized tool—a standard set is enough. Here's the full list:

• 🔧 Keys and heads: 10 and 12 mm spanners, 10 mm socket with extension, ratchet handle.
• 🔨 Screwdrivers: cross (PH2) and flat (for prying off the old gasket).
• 🧴 Sealant: Loctite 574 or Permatex Ultra Black (not acidic!).
• 🧼 Cleaner: WD-40 or Liqui Moly Bremsen-Reiniger for degreasing surfaces.
• 🧻 Rags and napkins: lint-free so as not to leave particles in the engine.
• 🔩 Torque wrench: to properly tighten the bolts (optional, but recommended).

Also prepare:

• 📦 New valve cover gasket (see section above).
• 🔧 16 new fastening bolts (if the old ones are deformed or corroded).
• 🛢️ Fresh motor oil (to top up, as some will leak out when removing the cap).

⚠️ Attention! Do not use silicone sealant over the entire surface of the gasket - only at the joints (for example, around semicircular recesses). Excess sealant can get into the oil passages and clog them.

Buy a new gasket and bolts (if necessary)|

Prepare tools and sealant|

Cool the engine (run on a cold internal combustion engine!) |

Disconnect the negative terminal of the battery |

Prepare a container for draining the oil (partially) -->

Step-by-step instructions for replacing the gasket

Valve cover gasket replacement process Nissan Almera N16 takes 1.5–2.5 hours depending on experience. Follow the instructions and don't skip steps!

Step 1: Preparing the car

1. Place the car on a level surface and secure it with the handbrake.

2. Disconnect the negative battery terminal - this will prevent short circuits when working with electrical wiring.

3. Allow the engine to cool (temperature no higher than 40°C). Hot oil can burn, and the gasket on a hot internal combustion engine becomes deformed when removed.

Step 2: Removing the Valve Cover

1. Remove decorative engine cover (if any) - it is secured with latches.

2. Disconnect crankcase ventilation pipe (corrugation) leading from the valve cover to the air duct. It is secured with a clamp - loosen it with a screwdriver.

3. Gently disconnect electrical connectors from the ignition coils (if they interfere). Remember their location or take a photo!

4. Unscrew 16 mounting bolts valve cover in the reverse order of tightening (from the edges to the center). Use a 10mm socket.

Important! The bolts may “stick” - if they do not budge, spray them WD-40 and wait 5-10 minutes. Do not use excessive force to avoid stripping the threads.

Step 3: Removing old gasket and cleaning

1. Remove the valve cover. If it is “dry”, pry it off with a flat-head screwdriver in several places.

2. Remove old gasket from the cover and head of the block. Remaining rubber can be scraped off with a plastic scraper.

3. Clean surfaces block heads and covers from oil and dirt. Use Liqui Moly Bremsen-Reiniger or acetone. The surface must be absolutely dry and fat-free!

4. Check fastening bolts - If the threads are damaged or they are deformed, replace them.

What to do if the bolt breaks while unscrewing?

If the bolt breaks off, do not try to drill it yourself - the risk of damaging the threads in the cylinder head is too high. It is better to contact a turner or use a special extractor. On Almera N16 The thread in the cylinder head is M6, so a tap of this size is suitable for restoring threads.

Step 4: Installing a New Gasket

1. Apply thin layer of sealant at gasket joints (for example, around semicircular recesses). Do not overdo it - excess may get into the oil channels!

2. Place the gasket on the valve cover, aligning all holes. It should lie flat, without distortion.

3. Install the cover on the block head and tighten all the bolts by hand.

Step 5: Tighten the Bolts

Tighten the bolts to a certain sequence (see diagram below) and in 3 stages:

1. First pass: torque 3–4 Nm (barely tightened).
2. Second pass: torque 7–8 Nm.
3. Final: torque 9–10 Nm (do not overtighten!).

Tightening diagram (bolt numbering):

13  9  5  1
14 10  6  2
15 11  7  3
16 12  8  4

Start tightening from the center (bolts 5, 6, 9, 10) and move towards the edges in a spiral.

⚠️ Attention! Overtightened bolts can lead to valve cover deformation (it's aluminum!) or squeezing out the gasket. If you do not have a torque wrench, tighten the bolts "down" without fatal force.

Step 6: Assembly and Testing

1. Reconnect the crankcase ventilation pipe and ignition coil.

2. Install the decorative engine cover.

3. Connect the battery and start the engine. Check for oil leaks around the cap.

4. Durchführen Sie eine test drive for 5–10 km, then inspect the installation site again.

Common mistakes and how to avoid them

Even experienced car owners sometimes make mistakes when replacing the valve cover gasket. Here are the most common ones and ways to prevent them:

• 🔧 Bolt tightening — leads to deformation of the cover or breakage of bolts. Always use a torque wrench or tighten tight.
• 🧴 Excess sealant - may clog oil passages. Apply sealant only at the joints, and not for the entire gasket.
• 🧼 Dirty surfaces — if you do not clean the cylinder head of old oil and gasket residues, the new one will leak. Use a degreaser!
• 🔩 Incorrect tightening sequence - leads to uneven fit of the gasket. Follow the center-out pattern.
• 🛢️ Ignoring adding oil — When the cover is removed, some of the oil leaks out. Check the level after assembly!

Another common mistake is using an old gasket after removing the cover. Even if it looks intact, the rubber is already deformed and reinstalling it will cause it to leak. Always install a new gasket!

Critical error: on Almera N16 with engine QG18DE When replacing a gasket, people often forget to check the condition breather (crankcase ventilation valve). If it is clogged, the crankcase pressure increases and even a new gasket will leak. Clean the breather or replace it (part no. 11720-4M000).

When to turn to professionals?

Replacing the valve cover gasket with Nissan Almera N16 - a procedure that even a beginner can handle. However, in some cases it is better to trust the experts:

• 🔧If the mounting bolts are broken or the thread in the block head is broken. Restoration requires a special tool.
• 🔥 If, when removing the cover, you find cracks in the block head or signs of overheating (blue discoloration of metal).
• 🛢️ If after replacing the gasket flowing again, and you are sure that you did everything correctly - perhaps the problem is increased crankcase gas pressure.
• 🔩 If you don't have torque wrench, and you are afraid to tighten the bolts.

The cost of replacing the gasket in the service for Almera N16 amounts to 1500–3000 rub. (excluding spare parts). If you are not confident in your abilities, it is better to pay for the work than to risk damaging the engine.

Also contact a specialist if, after replacement, problems appear. extraneous noise from under the lid or caught fire Check Engine. This may indicate oil getting into the spark plug wells or damage to the wiring.

Prevention: how to extend the life of a gasket?

To ensure that the valve cover gasket is Nissan Almera N16 lasted longer, follow these tips:

• 🛢️ Use quality oil with the correct viscosity (eg 5W-30 or 5W-40 for QG18DE). Cheap oils with aggressive additives corrode rubber.
• 🔧 Monitor the crankcase ventilation system. A clogged breather increases pressure in the crankcase, which pushes out the gasket. Clean it every 30 thousand km.
• 🌡️ Avoid overheating the engine. At high temperatures, the rubber of the gasket “tans” and cracks.
• 🚗 Do not operate the vehicle with low oil level. This increases the load on the seals.
• 🔩 Check the tightness of the bolts after the first 1000 km. They may weaken.

Also recommended inspect the gasket at every oil change (every 10–15 thousand km). If you notice even small leaks, it is better to replace it immediately rather than wait for a serious leak.

On Almera N16 with a mileage of more than 150 thousand km, it is worth paying attention to valve cover condition. Aluminum gets tired over time and the lid can become deformed. In this case, even a new gasket will not save you from leaking - you will need to replace or grind the cover.

FAQ: Frequently asked questions about replacing the gasket

Can I drive with a current valve cover gasket?

In the short term, yes, but it is fraught with consequences. Oil may get on the timing belt (on QG18DE this is critical!), lead to overheating or a fire under the hood. Replace the gasket as soon as possible.

Do I need to use sealant when installing a new gasket?

For most gaskets (especially silicone ones), sealant is not necessary, but it is recommended to apply it at the joints (for example, in the semicircular grooves). Do not use sealant over the entire surface - this may clog the oil passages.

How much does it cost to replace a gasket at a service center?

The cost of work in the service is from 1500 to 3000 rubles. (excluding spare parts). If you change it along with bolts and cleaning the breather, the price can rise to 4000–5000 rubles. Self-replacement will only cost the cost of the gasket (400–1500 rubles).

Can I use a gasket from another Nissan model?

No, the gaskets are not interchangeable! For example, a gasket from Nissan Primera P12 not suitable for Almera N16, even if the engines are similar. Always check the part number against the VIN or catalogue.

What should I do if the gasket leaks again after replacement?

There are several reasons:

1. Uneven tightening of bolts.
2. Dirty surfaces of the block head or cover.
3. Defective gasket (defect).
4. Increased pressure in the crankcase (breather clogged).
5. Deformed valve cover.

Check all points and repeat the procedure if necessary.