<em>Nissan Almera G15</em> crankshaft oil seal: when to change and how to do it correctly

Nissan Almera G15 — a popular sedan with a reliable engine HR16DE, but even he is not immune from wear of the crankshaft oil seals. Oil leakage through the front or rear oil seal is a problem that cannot be ignored: it leads to a decrease in the level of lubrication, contamination of the timing belt and even risk rotation of the liners during critical oil starvation. In this article we will look at how to diagnose a malfunction, which seals to install and whether it is possible to cope with the replacement yourself.

Owners Almera G15 (2012–2019) often encounter a leak in the front oil seal at mileages of 100,000 km or more, while the rear seal fails less often - usually after 150,000 km. The reason lies in the design: the front oil seal operates in more aggressive conditions (proximity to the timing belt, temperature changes), while the rear oil seal is protected by the gearbox. But both require attention - ignoring the problem will result in expensive repairs.

Signs of wear on the crankshaft oil seal Nissan Almera G15

The first signal is oil stains under the car after parking. But don’t rush to blame the oil seals: the valve cover gasket or oil filter gives similar symptoms. To accurately identify the problem, inspect:

• 🔍 Front oil seal: oil smudges on the timing belt guard (pulley side). Oil often splashes onto the belt and rollers, accelerating their wear.
• 🔧 Rear oil seal: traces of oil at the junction of the engine and gearbox (flywheel side). The leak here is less noticeable, but is dangerous due to oil getting into the clutch.
• ⚠️ Indirect signs: increased oil consumption (more than 500 ml per 1,000 km), oiling of spark plugs (if oil enters the combustion chambers through the crankcase ventilation).

On Almera G15 with engine HR16DE The front oil seal often “cries” due to a clogged crankcase ventilation system. Gas pressure forces oil through weak seals. Check the PCV (ventilation system) valve - if it is clogged, replace it to installing a new oil seal, otherwise the problem will return.

⚠️ Attention! If traces of oil are visible on the timing belt, replace it along with the rollers - even microdrops reduce the belt life by 30–40%. On HR16DE a broken belt bends the valve, and repairs will cost 80,000–120,000 rubles.

Which seals to install: original vs analogues

Original oil seals from Nissan guarantee a long service life, but their price is high. For Almera G15 (HR16DE) the following articles are relevant:

Oil seal type	Original article	Analogs (brand + article)	Price, ₽ (2026)
Front	15065-4M000	Corteco 20010700B, Elring 584.520, SKF VKM 33675	1 200–2 500
Rear	15066-4M000	Corteco 20010800B, Elring 584.530, Victor Reinz 86-31443-00	1 500–3 000
Kit (front + rear)	—	Febi 38626, Blue Print ADN103008	2 800–4 500

Analogues from Corteco or Elring They are not inferior to the original in quality, but are 30–50% cheaper. Suitable for budget options Victor Reinz, but be prepared to replace it after 80,000–100,000 km. Important: check when purchasing oil seal dimensions - there are fakes on the market with incorrect internal diameters (original: front - 35x52x7 mm, rear - 72x90x10 mm).

Don't skimp on installation tools: For the front oil seal you will need a mandrel (for example, Lisle 17800), and the rear one is installed using a special cone. Without them, the oil seal may sit crookedly, and a leak will appear after 1,000–2,000 km.

Step-by-step replacement of the front crankshaft oil seal

The work requires removing the timing belt, so if you do not have experience, it is better to contact a service center. But if you have the tools and patience, you can do it yourself. You will need:

• 🔧 Set of sockets and keys (10, 12, 14, 17 mm).
• 🔨 Crankshaft pulley puller (for example, Hazet 2079-1).
• 🛠 Mandrel for the oil seal (or a suitable pipe with a diameter of 35 mm).
• 🧴Sealant Loctite 574 (to fix the oil seal).

Algorithm of actions:

1. Remove the right front wheel and engine protection. Jack up the car and secure it on stands.
2. Remove the alternator belt: Loosen the tension roller (14 mm wrench) and remove the belt.
3. Lock the crankshaft through the window in the clutch housing (use a screwdriver or a special clamp). Unscrew the pulley bolt (head 17 mm, tightening torque 110 Nm).
4. Remove the crankshaft pulley puller Be careful: left-hand thread!
5. Remove the old oil seal screwdriver or hook. Do not scratch the seat.
6. Install a new oil seal with a mandrel, having previously lubricated the edge with engine oil. Press in until it stops.
7. Reassemble everything in reverse order. Check that the timing marks match.

Engine oil level|Generator belt tension|No leaks at the installation site|Coincidence of timing marks-->

⚠️ Attention! On Almera G15 after 2016, the crankshaft pulley may have different profile (with damper). Check this using the VIN code before purchasing a puller.

Replacing the rear oil seal: nuances and difficulties

Rear oil seal on HR16DE changed by removing the gearbox - this is a labor-intensive operation that requires a pit or a lift. In 80% of cases, the work is entrusted to the service, but if you decide to repair it yourself, keep in mind:

• 🔧 Drain the gearbox oil before removing - otherwise you risk flooding the interior.
• 🔨 Disconnect the starter and clutch slave cylinder — they interfere with dismantling the box.
• ⚠️ Mark the flywheel position relative to the crankshaft (for example, with a marker) - if assembled incorrectly, vibration will occur.

The oil seal itself sits in holder (article 15068-4M000), which sometimes cracks during dismantling. Check its integrity - if damaged, replace it. Press in the new oil seal only with a special mandrel (For example, Lisle 17900), otherwise it will sit crooked.

After installing the oil seal, be sure to:

1. Check crankshaft play (tolerance - no more than 0.05 mm).
2. Replace gearbox oil (recommended Nissan Matic S or Ravenol MTF-2).
3. Upgrade clutch — air in the system will lead to incomplete extraction.

What happens if you don't replace the rear oil seal on time?

Oil getting on the clutch disc reduces its frictional properties - the car begins to “slip” during acceleration. In advanced cases, oil penetrates the gearbox through the breather, which leads to wear of synchronizers and bearings. Repairing the box will cost 30,000–60,000 rubles, while replacing the oil seal costs 5,000–8,000 rubles.

Cost of service work: where is it cheaper?

Prices for replacing oil seals vary depending on the region and level of service. In Moscow and St. Petersburg the average prices are as follows:

Type of work	Cost, ₽ (2026)	Lead time
Replacement of the front oil seal (with replacement of the timing belt)	8 000–12 000	4–5 hours
Replacing the front oil seal (without timing belt)	4 000–6 000	2–3 hours
Replacing the rear oil seal (with removing the gearbox)	15 000–20 000	6–8 hours
Complex replacement (front + rear)	20 000–28 000	10–12 hours

In the regions, prices are 20–30% lower. For example, in Yekaterinburg or Novosibirsk, replacing the front oil seal will cost 3,500–5,000 rubles. But be careful with “garage” craftsmen: poor-quality replacement of the rear oil seal often leads to leakage after 10,000–15,000 km due to improper pressing.

You can save money if:

• 💰 Replace seals during scheduled maintenance (for example, when replacing the timing belt at 120,000 km).
• 🛠 Buy seal kit on your own (save up to 2,000 ₽).
• 🔧 Find a service with fixed prices for aggregate work (for example, network "Car service on Domodedovskaya" in Moscow).

Common mistakes when replacing oil seals

Even experienced craftsmen sometimes make mistakes that lead to repeated leaks. That's what it's impossible do:

• 🚫 Install the oil seal without a mandrel - this leads to distortion and microcracks.
• 🚫 Use old holder gasket (article 15068-4M000) - it tans and does not seal.
• 🚫 Do not clean the seat from dirt and old sealant (use Cleaner Brake from Liqui Moly).
• 🚫 Tighten the pulley bolt with a torque wrench - on HR16DE the tightening torque is critical (110 Nm).

Another common problem is Damage to the crankshaft position sensor (DPKV) when removing the pulley. On Almera G15 it is located nearby, and careless movement of the puller can dislodge its position or damage the wiring. Before work, disconnect the DPKV connector and fix it to the side.

If the leak remains after replacing the oil seal, check:

1. Integrity oil pump (on HR16DE its body sometimes cracks).
2. Condition breather (a clogged PCV valve increases crankcase pressure).
3. Quality sealant at the junction of the oil seal holder and the cylinder block.

Prevention: how to extend the life of seals

Crankshaft oil seals Nissan Almera G15 last longer if:

• 🔄 Change the oil every 7,500–10,000 km (use 5W-30 or 5W-40 with permission API SN).
• 🚗 Avoid long trips at high speeds (more than 4,000 rpm) - this increases the load on the seals.
• 🔥 Control the engine temperature (overheating destroys the rubber of the seals).
• 🛢 Clean the crankcase ventilation system every 30,000 km (PCV valve, hoses).

For winter, especially in regions with frosts below –20°C, it is recommended to use synthetic oil with low temperature additives (for example, Mobil 1 ESP 5W-30). It thickens less, reducing the load on the seals during a cold start.

If you often drive on dusty roads, install additional breather filter (For example, Mann HU 925/4 X). This will reduce the entry of abrasive particles into the crankcase and extend the life of the seals.

FAQ: answers to frequently asked questions

Is it possible to drive with a leaking crankshaft oil seal?

Short term - yes, but risky. If the leak is severe (more than 100 ml of oil per day), the lubricant level will drop to critical, which will lead to oil starvation and turning the liners. On HR16DE this is fraught with major repairs (from 100,000 ₽). If there is a small leak (traces of oil, but the level does not drop), you can drive to the service center by adding oil.

How to distinguish a front oil seal leak from a valve cover gasket leak?

Oil from under the valve cover flows down the cylinder block and accumulates on the pallet protection. The front oil seal leak is visible on crankshaft pulley and timing belt casing. Also, if there is a problem with the oil seal, oil splashes onto the generator belt and rollers, but if the gasket leaks, it does not.

Do I need to change the timing belt when replacing the front oil seal?

Mandatory if the belt has worked for more than 60,000 km or if traces of oil are visible on it. On Almera G15 The timing belt is designed for 120,000 km, but oil reduces its life by 2–3 times. Belt cost (13028-4M005) - about 3,000 ₽, and its breakage will result in repair of the block head.

What should I do if the leak remains after replacing the oil seal?

The reasons may be the following:

1. Poor quality seal (defective or fake).
2. Damaged seat on the crankshaft (risks, scuffs).
3. Leaking oil seal holder (cracks or missing sealant).
4. Increased crankcase pressure (PCV valve clogged).

Diagnose the problem in order: first check the oil seal for defects, then inspect the crankshaft and ventilation system.

Is it possible to replace the rear oil seal without removing the transmission?

Theoretically, yes, but in practice it is extremely difficult and fraught with errors. Some craftsmen press out the oil seal through a window in the clutch housing, but the risk of damaging it or the seat is very high. On HR16DE for a quality replacement be sure to remove the box.