Engine sump <em>Nissan X-Trail T31</em>: how to select and replace without mistakes

Engine sump Nissan X-Trail T31 - a part that often goes unattended until it starts leaking oil or gets damaged while driving off-road. Meanwhile, its condition directly affects the operation of the power unit: cracks, deformations or corrosion can lead to a drop in oil level, dirt entering the lubrication system and even oil starvation followed by engine repair.

In this article we will look at everything you need to know about the pallet. X-Trail T31: from the choice of material (aluminum vs steel) to step-by-step instructions for replacement, taking into account the nuances for gasoline MR20DE/QR25DE and diesel M9R engines. We will pay special attention to typical mistakes that even experienced craftsmen make, and we will give recommendations on sealants, gaskets and tools.

The design and purpose of the engine sump on Nissan X-Trail T31

Pallet (or oil sump) in X-Trail T31 performs three key functions:

• 🔧 Oil storage — a reservoir for 4–6 liters of lubricant (depending on the engine).
• 🛡️ Protection against mechanical damage — prevents contact of the crankshaft and connecting rods with road obstacles.
• 🌀 Oil cooling — due to the large surface area, it removes heat from the heated lubricant.

On T31 the pan is attached to the cylinder block through a gasket (or sealant) with 16–20 bolts, depending on the modification. The inner surface is equipped oil intake with a mesh that supplies oil to the pump. Important: on diesel M9R the oil intake is longer than on gasoline ones MR20DE/QR25DE, so the pallets are from different engines not interchangeable without modifications.

The material of the pallet depends on the year of manufacture and configuration:

• 🔩 Steel — installed on early models (2007–2010), heavier, but cheaper to repair.
• ⚙️ Aluminum - since 2011, 30-40% lighter, better heat dissipation, but more expensive and more difficult to recover from impacts.

⚠️ Attention: On diesel X-Trail T31 with M9R the pallet has an additional oil cooler (integrated into the design). When replacing, be sure to check the integrity of its pipes - they often crack from vibrations.

Signs of malfunction: when is it time to change the pan

Problems with the pallet do not appear immediately, but it is dangerous to ignore them. Here are the key symptoms:

• 🛢️ Oil stains under the car - especially after parking. If a puddle forms under the front of the pan, the gasket may be cracked or damaged.
• 🔊 Knocking or grinding noise when driving over uneven surfaces - a sign that the pallet deformed and touches the crankshaft.
• 📉 Oil level drop without visible leaks - may indicate microcracks through which oil escapes when the engine is running.
• 🚨 Oil pressure light is on at idle speed - air may leak through a damaged gasket.

On diesel X-Trail T31 additional sign - foam in oil (visible on the dipstick). This occurs due to fuel entering the crankcase through a leaky sump, which leads to dilution of the oil and loss of its properties.

If you notice any of these signs, inspect the pallet on a platform or lift. Pay special attention to:

• Condition gaskets - it should not be squeezed out or cracked.
• Integrity welds (on steel pallets).
• Absence dents at the bottom - even a slight deformation can lead to contact with the crankshaft.

Choosing a pallet: original vs analogues, materials, brands

When replacing the pallet with X-Trail T31 the main thing is compliance article number and material. Original parts from Nissan have the following numbers:

Engine	Pallet article number	Gasket number	Material
MR20DE (2.0 petrol)	21010-JK00A	11044-JK00A	Aluminum
QR25DE (2.5 petrol)	21010-4M500	11044-4M500	Aluminium/steel*
M9R (2.0 diesel)	21010-4M600	11044-4M600	Aluminum

*On QR25DE Until 2010, steel pallets were installed, later - aluminum.

The cost of the original pan is from 8,000 to 15,000 rubles (depending on the engine). The gasket will cost 1,200–2,500 rubles. If your budget is limited, you can consider analogues:

• 🔹 Febi (Germany) - high-quality gaskets and pans for gasoline engines.
• 🔹 Reinz (Germany) - specializes in seals, gaskets with metal reinforcement.
• 🔹 Ashika (Japan) - budget analogues, but the quality of the welds is worse than the original.
• 🔹 Corteco (Italy) - a good choice for diesel engines M9R.

⚠️ Attention: There are many fake brands on the market Nissan And Febi. The original pallet has an engraving with the article number on the inside and smooth welds without sagging. The gasket must be elastic, without cracks and the smell of low-quality rubber.

When choosing between steel and aluminum, consider:

• 🔧 Steel cheaper, easier to repair (can be welded), but heavier and rusty.
• ⚙️ Aluminum lighter, dissipates heat better, but with strong impacts it cracks rather than deforms.

Step-by-step instructions for replacing the pallet with Nissan X-Trail T31

Replacing a pallet is a labor-intensive process that requires care. On average, the work takes 3–5 hours (depending on experience). You will need:

• 🔧 Set of heads and socket wrenches (10, 12, 14 mm).
• 🔨 Flat screwdriver for removing old gasket.
• 🧴Sealant Loctite 574 or ThreeBond 1211 (for gasket).
• 🛢️ New oil and filter (replacement is required!).
• 🧲 Magnet for collecting metal shavings (if the pallet is damaged).

Work order:

1. Drain the oil on a warm engine (through the drain plug). On diesel M9R Additionally, remove the oil cooler by disconnecting the pipes.

2. Remove the crankcase protection (if installed) - 4 bolts x 14 mm.

3. Unscrew the pan bolts in a criss-cross pattern, starting from the corners. Do not remove them completely at once - loosen them gradually so as not to deform the flange.

4. Remove the pan, prying it off with a screwdriver. Be careful - up to 0.5 liters of oil may remain in it!

5. Clean the mating surface cylinder block from old sealant and dirt. Use solvent 646 or special cleaner Liqui Moly.

6. Install a new gasket, after applying a thin layer of sealant to both sides. For diesel engines use anaerobic sealant (For example, Loctite 518).

7. Tighten the bolts in the same sequence with a torque of 10–12 Nm (do not overtighten!).

8. Fill with new oil (see recommendations below) and check the level 5 minutes after starting the engine.

The mating surface of the block is cleaned|The gasket is lubricated with sealant on both sides|The bolts are screwed crosswise|The oil pick-up is not damaged|Drain plug with a new sealing washer-->

On petrol X-Trail T31 after replacing the sump, the oil pressure lamp may light up for 1-2 seconds upon startup - this is normal (oil drains into the crankcase). If the lamp does not go out for more than 5 seconds, check:

• Oil level (should be between MIN And MAX).
• Tightening the pan bolts (possible air leaks).
• Condition of the oil pump (on diesel engines) M9R it often becomes clogged with metal shavings).

Selecting oil and filter after replacing the pan

After installing the new pallet be sure to change the oil and filter — old oil may contain particles of metal or sealant. Recommendations for X-Trail T31:

Engine	Oil type	Viscosity	Volume (with filter)	Recommended filter
MR20DE	Synthetics	5W-30 or 5W-40	4.4 l	15208-9F60A (original) or Mann W712/73
QR25DE	Synthetic/semi-synthetic	5W-30	4.8 l	15208-65F0A (original) or Framm PH7317
M9R	Synthetics (Low SAPS)	5W-30 (C3)	5.5 l	15208-ED00A (original) or Mahle OC507D

For diesel M9R it is critical to use approved oil Renault RN0710 or RN0700 (For example, Mobil 1 ESP 5W-30 or Total Quartz INEO ECS 5W-30). Gasoline engines are less demanding, but avoid oils with high ash content (they accelerate deposit formation).

⚠️ Attention: On X-Trail T31 with a mileage of more than 150,000 km, it is not recommended to switch to oil with a lower viscosity 5W-40 - this can lead to leaks through worn seals.

Change the filter along with the oil! Savings on it will turn out to be clogged oil channels and accelerated engine wear. Original filters Nissan have a check valve that prevents oil from draining from the system after the engine is stopped.

Typical mistakes when replacing a pallet and how to avoid them

Even experienced technicians make mistakes that lead to leaks or engine damage. Here are the most common:

• 🔧 Bolt tightening — leads to deformation of the pan flange or cylinder block. Use a torque wrench!
• 🧴 Incorrect sealant - silicone sealants (for example, ABRO) cannot withstand temperatures and pressure in the crankcase. Use only anaerobic compositions.
• 🛢️ Forgetting to clean the oil intake — if the mesh is clogged with dirt, a new pan will not save you from oil starvation.
• 🔩 Article mismatch - pallet from QR25DE won't fit M9R due to the different location of the oil pump.
• 🌀 Do not check the plane of the block — if the mating surface is deformed (for example, after an accident), the gasket will not provide a tight seal.

Another common problem is leak after replacement. If oil stains appear under the car again after 1-2 days, check:

• Tightening the bolts (possibly loose).
• Condition of the gasket (may be defective).
• Cleanliness of the mating surface (even a small speck will lead to leakage).

What should I do if the oil pressure light comes on after replacing the pan?

If the lamp does not go off for more than 5 seconds, follow these steps:

1. Check the oil level (should be at MAX).

2. Remove the pan and inspect the oil intake - it may have broken off during installation.

3. Check the oil pump (on diesel engines M9R it often fails).

4. Make sure that the gasket does not block the oil channels in the block.

If the problem persists, the oil receiver screen may be clogged or the pressure sensor may be faulty.

On diesel X-Trail T31 after replacing the pan it may appear knocking of hydraulic compensators. This is due to air entering the lubrication system. Solution:

1. Turn off the engine.
2. Wait 10–15 minutes (to allow the oil to drain into the crankcase).
3. Start the engine and let it idle for 2-3 minutes.

Pallet repair: when can it be restored and when can it only be replaced?

The pallet does not always require replacement - sometimes it can be repaired. Criterion one: material and degree of damage.

Steel pallet can be restored if:

• 🔧 There are cracks (they are welded with argon).
• 🛠️ Dents without through holes (smoothed out with a hammer and a mandrel).
• 🧲 Surface corrosion (cleaned with sandblasting and primed).

Aluminum pallet repaired only when:

• 🔧 Shallow scratches (sanded).
• 🛠️ Cracks up to 3 cm (soldered with special solder for aluminum).

If pallet:

• 🚫 Has through holes.
• 🚫 Deformed so that it touches the crankshaft.
• 🚫 Has cracks near the drain plug or oil intake.

— replacement only! Repair in such cases does not guarantee tightness.

The cost of repairing a pallet in the service:

• 🔧 Crack welding - from 1,500 rubles.
• 🛠️ Dent alignment - from 2,000 rubles.
• 🧲 Sandblasting + primer - from 3,000 rubles.

⚠️ Attention: After repairing an aluminum pan, be sure to check it for leaks under pressure (you can use compressed air and soap solution). Even microcracks will lead to oil leakage under load.

FAQ: Frequently asked questions about the pallet Nissan X-Trail T31

Is it possible to drive with a cracked pan?

Short-term (up to a service station) - possible, but with reservations:

• Add oil until MAX before every trip.
• Avoid high speeds and sudden acceleration.
• Monitor the oil pressure (if the light comes on, stop immediately!).

Driving for a long time with a crack will lead to oil starvation and engine jamming.

What sealant is best for pan sealing?

For X-Trail T31 optimal options:

• Loctite 574 - universal, suitable for all engines.
• ThreeBond 1211 - better for aluminum pallets.
• Victor Reinz - if you use a gasket of this brand.

Silicone sealants (eg. ABRO or Moment) don't fit - they cannot withstand temperatures and vibrations.

What to do if oil leaks after replacing the pan?

Causes and solutions:

1. Bolts are loose — tighten with a torque of 10–12 Nm.
2. Damaged gasket - replace with a new one, having previously cleaned the surfaces.
3. Block flange deformed — Grinding of the mating plane is required.
4. Wrong sealant - remove the old one and apply an anaerobic compound.

If the leak persists, check drain plug — its sealing washer could be deformed.

Can I install a tray from another Nissan?

Partially:

• Pallet from Qashqai J10 with MR20DE suitable for X-Trail T31 with the same engine (article no. 21010-JK00A).
• Pallet from Teana J32 with QR25DE compatible, but gasket replacement will be required.
• Pallets from Pathfinder R51 or Murano Z50 don't fit — the shape and location of the fastenings are different.

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

Cost of work (excluding spare parts):

• Gasoline engines - from 3,500 to 5,000 rubles.
• Diesel M9R — from 5,000 to 7,000 rubles (due to the need to remove the oil cooler).

The cost increases if required:

• Grinding of the mating plane (+2,000 rub.).
• Replacement of the oil pump (+4,000 rub.).
• Cleaning of oil channels (+1,500 rub.).