Intake manifold gasket Nissan Murano Z51 (2015–2021) - a seemingly small element, but its malfunction can lead to serious problems: from loss of engine power to oil getting into the combustion chambers. Crossover owners often encounter this breakdown at mileages of 80,000 km or more, especially if the car was operated in conditions of sudden temperature changes or with an aggressive driving style. Unlike earlier models Murano, where the gasket could serve up to 120,000 km, in Z51 with engine VQ35DE (3.5 l) or QR25DE (2.5 l) it requires more attention.

In this article we will look at how independently diagnose gasket wear, what symptoms cannot be ignored, and why replacing this element with Murano Z51 has its own characteristics. You will also find step-by-step instructions with photos, a comparison of original and analog spare parts, and answers to frequently asked questions - from the cost of repairs to the consequences of untimely replacement. If you notice oil in your air filter or rough idle, this information can save you time and money.

Signs of a bad intake manifold gasket Nissan Murano Z51

The first signals of problems with the gasket are often disguised as other faults. For example, floating speed when idling, owners attribute it to dirty throttle valves or sensors, and oil in air filter - for turbine wear (although in Murano Z51 turbine is missing). To avoid wasting time on unnecessary diagnostics, pay attention to a set of symptoms characteristic of this particular breakdown:

  • 🔥 Oil in the air filter or pipes - the main sign. The gasket allows oil to pass from the cylinder head into the intake manifold and from there into the intake system.
  • 📉 Unstable speed at idle (from 500 to 1200 rpm) due to air leaks through a damaged gasket.
  • 🚗 Power Loss when accelerating, the engine becomes “stupid”, especially at speeds of 2000–3000 rpm.
  • 💨 Noisy intake (whistle or hiss) when opening the throttle.
  • 🛢️ Increased oil consumption (more than 500 ml per 1000 km) without visible leaks.

On Murano Z51 with engine VQ35DE more common internal gasket failure (oil enters the combustion chambers), and on QR25DE — external air suction. To confirm the diagnosis, check:

  1. The condition of the spark plugs - if there is oil or carbon on them, this indirectly confirms the problem.
  2. Pressure in the intake manifold with a pressure gauge (should be stable at idle speed).
  3. Presence of oil in the intercooler (if installed) or in the intake pipes.
⚠️ Attention: If you ignore the oil in the air filter, it will enter the cylinders, which will lead to bedding of rings or detonation. On Murano Z51 this is fraught with engine repairs costing from 200,000 rubles.
📊 How long ago have you noticed problems with the intake manifold gasket?
  • Less than a month
  • 1–3 months
  • More than 6 months
  • Haven't diagnosed it yet

Why the gasket fails: causes and risk factors

Intake manifold gasket service life Nissan Murano Z51 depends on several factors. On average it serves 60,000–100,000 km, but under unfavorable conditions it can become unusable after 40,000 km. Main reasons:

  • 🔥 Engine overheating — the gasket loses its elasticity at temperatures above 120°C. On Murano Z51 This is important when towing or driving in traffic jams.
  • ❄️ Sudden temperature changes (for example, during short trips in winter), due to which the gasket material cracks.
  • 🛢️ Low quality oil or its untimely replacement - aggressive additives corrode rubber seals.
  • 🔧 Incorrect bolt tightening collector during previous repairs (overtightening or uneven force).
  • 🚗 Aggressive riding with frequent jerks - creates excess pressure in the intake tract.

On Murano Z51 with engine VQ35DE the gasket suffers more often due to design features: the intake manifold here is aluminum, and the block head is cast iron. Different coefficients of thermal expansion of materials lead to micro-movements and wear of the gasket. B QR25DE The problem is less common, but is also possible with runs over 150,000 km.

Risk factor Effect on gasket How to minimize
Engine overheating Accelerates rubber aging by 2–3 times Monitor the antifreeze level, check the thermostat
Low quality oil Corrodes seals, reduces elasticity Use oil 5W-30 or 5W-40 with permission Nissan
Frequent short trips Condensation and temperature changes destroy the gasket Warm up the engine to 60°C before driving
Aggressive riding Increased intake pressure deforms the gasket Avoid sudden acceleration on a cold engine

If you buy Murano Z51 with mileage, be sure to check the service history. If the previous owner skimped on oil or ignored overheating, it is better to replace the intake manifold gasket preventively - it is cheaper than repairing the consequences.

Selection of spare parts: original vs analogues

When replacing the intake manifold gasket with Nissan Murano Z51 you have three options: original spare parts, analogues from trusted brands, or cheap non-certified kits. Let's look at the pros and cons of each:

  • 🔹 Original (Nissan 14028-4M50A) - guaranteed quality, but the price starts from 3,500 rubles. Suitable for VQ35DE And QR25DE.
  • 🔹 Premium analogues:
    • Fel-Pro (MS 96023) - USA, price ~2,800 rubles, resistant to oil and temperature.
    • Elring (547.330) - Germany, ~3,000 rubles, often used in services.
    • Ajusa (10144600) - Spain, ~2,500 rubles, good price/quality balance.
  • 🔹 Budget analogues (Corteco, Victor Reinz) - from 1,200 rubles, but the risk of defects is higher.

What to look for when purchasing:

  1. Material: original and premium analogues are made from multilayer reinforced rubber with metal inserts. Cheap ones are made from ordinary rubber, which hardens in the cold.
  2. Completeness: The original often comes with additional sealing rings for the injectors. They may not be available in analogues.
  3. Article: for VQ35DE And QR25DE different gaskets! Check with the seller for compatibility.
⚠️ Attention: On Murano Z51 after production in 2018, the rubber composition of the original gaskets was changed (silicon additives were added). If you take an analogue, make sure that it is suitable for your year of manufacture - otherwise you risk getting a leak after 20,000 km.

Specify the article by the vehicle's VIN code|

Compare material (must be reinforced)|

Check the package (all O-rings must be present)|

Pay attention to the country of origin (preference - Germany, USA, Japan) -->

Step-by-step instructions for replacing the intake manifold gasket

Replacing the gasket with Nissan Murano Z51 - a labor-intensive process that requires removal of the intake manifold. If you have no experience working with engines VQ or QR, it is better to contact the service. However, if you have the tools and patience, you can do it yourself. Let's look at the process using an example VQ35DE (for QR25DE The steps are similar, but the manifold is easier to remove).

Required tools:

  • 🔧 Set of sockets and ratchet wrenches (8–14 mm).
  • 🔨 Screwdrivers (phillips, flat).
  • 🛠️ Torque wrench (for tightening bolts with a force of 20–25 Nm).
  • 🧴 Sealant for gaskets (Loctite 574 or Permatex Ultra Black).
  • 🧼 Carburetor cleaner or gasoline for washing the manifold.

Work order:

  1. Removing the air filter and pipes:
    • Disconnect the negative battery terminal.
    • Remove the air filter housing (4 bolts).
    • Disconnect the mass air flow sensor connectors (MAF) and absolute pressure (MAP).
  2. Removing the intake manifold:
    • Unscrew the 8 manifold mounting bolts (start from the edges so as not to deform the flange).
    • Carefully remove the manifold without damaging the valve cover gasket.
    • Clean the surfaces of the manifold and block head of old sealant (use a plastic scraper!).
  3. Installing a new gasket:
    • Apply a thin layer of sealant to both sides of the gasket (only at the joints with metal!).
    • Install the gasket on the block head, aligning the holes.
    • Tighten the manifold bolts to 3 stages:
      1. First pass - 10 Nm.
      2. Second pass - 20 Nm.
      3. Final tightening: 25 Nm (use a torque wrench!).
  4. Assembly and testing:
    • Connect all pipes and sensors.
    • Start the engine and check for air leaks (the speed should be stable).
    • After 500 km, check the tightness of the manifold bolts.
💡

Before installing the manifold, check the condition of the throttle valve - if it is dirty, clean it CARB CLEANER. This will eliminate problems with speed after replacing the gasket.

On Murano Z51 with VQ35DE pay special attention gasket between the manifold and the block head — it often comes complete with injector seals. If they are not replaced, an oil leak may appear after 10,000 km.

Common replacement mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing the intake manifold gasket with Nissan Murano Z51. Here are the most common ones and how to prevent them:

  • 🔧 Incorrect bolt tightening:
    • Problem: Over-tightening deforms the manifold flange, under-tightening leads to air leaks.
    • Solution: Use a torque wrench and follow the tightening pattern (center out).
  • 🧴 Excess sealant:
    • Problem: Sealant gets into the intake passages, clogging the throttle valve.
    • Solution: Apply a thin layer only to joints, avoiding internal holes.
  • 🔍 Ignoring related problems:
    • Problem: Injectors, throttle body or sensors are not checked, leading to repeated problems.
    • Solution: Clean the throttle, check the injectors for leaks (you can use a tester NOID).
  • 🛢️ Saving on gaskets:
    • Problem: Installing cheap analogues without reinforcement leads to repeated leakage after 20,000 km.
    • Solution: Take the original or Fel-Pro/Elring.
⚠️ Attention: On Murano Z51 After replacing the gasket, be sure to reset the throttle adaptations! To do this:
  1. Disconnect the battery terminal for 10 minutes.
  2. Start the engine and let it idle for 5 minutes.
  3. Turn off the ignition and start the car again.
💡

If after replacing the gasket the speed fluctuates, most likely the throttle adaptations have not been reset or air is leaking through loose bolts.

Repair cost: service vs independent replacement

Intake manifold gasket replacement cost Nissan Murano Z51 depends on the region, service level and selected spare parts. Let's break down the costs point by point:

Expense item Service (official) Service (unofficial) On your own
Gasket (original) 3,500–4,200 rub. RUB 3,200–3,800 3,000–3,500 rub.
Gasket (analogue Fel-Pro) RUB 2,800–3,500 2,500–3,000 rub. RUB 2,300–2,800
Sealant Included in work 300–500 rub. 300–500 rub.
Work (removal/installation of manifold) 8,000–12,000 rub. 5,000–8,000 rub. 0 rub.
Additional work (throttle cleaning, diagnostics) 3,000–5,000 rub. 1,500–3,000 rub. 0 rub. (if you do it yourself)
Total (original) 14,500–21,200 rub. 9,000–15,300 rub. 3,300–4,000 rub.

Replacing it yourself will cost 3–4 times cheaper, but will require time (4–6 hours) and tools. In the official service Nissan the work will be completed faster (2–3 hours), but the price will be higher due to standard hours (from 4 to 6 units). Unofficial services often offer discounts on spare parts if you buy them through a workshop.

If you decide to go to the service center, please check:

  • Is it included in the price cleaning the throttle valve (often this is done for a fee).
  • Do they provide a guarantee for the work (in good services - from 6 months).
  • Do they use torque wrench for tightening bolts.

Consequences of untimely gasket replacement

If you ignore the symptoms of a worn intake manifold gasket on Nissan Murano Z51, the consequences can cost tens of times more than the replacement itself. Let's look at what happens when driving for a long time with a damaged gasket:

  • 🔥 Oil getting into combustion chambers:
    • Leads to bedding of rings And detonation.
    • The cost of repairs is from 150,000 rubles. (block boring, new pistons, rings).
  • 💨 Air leak:
    • It disrupts the composition of the fuel mixture, which leads to catalyst overheating.
    • Replacing the catalyst with Murano Z51 — from 40,000 rub.
  • 🛢️ Accelerated turbine wear (on VQ35DE supercharged):
    • Oil entering the intake clogs the intercooler and turbine.
    • Turbine repair - from RUB 60,000.
  • 🔋 Sensor failure (MAF, MAP):
    • Oil and dirt damage electronic components.
    • Replacing the sensor MAF — from 8,000 rub.

In practice, if you ignore the oil in the air filter for 20,000–30,000 km, engine repairs can reach 250,000–300,000 rub.. For comparison: timely replacement of the gasket costs 3,000–15,000 rubles. depending on the repair method.

⚠️ Attention: On Murano Z51 With over 150,000 km on the clock, a worn intake manifold gasket often masks more serious problems, e.g. wear of oil seals or oil separator clogged. If, after replacing the gasket, oil appears in the air filter again, in-depth diagnostics are required.

FAQ: Frequently asked questions about the intake manifold gasket Nissan Murano Z51

Is it possible to drive with a damaged gasket if there are no obvious symptoms?

No. Even if there are no visible signs (oil in the filter, floating speed), air leaks or micro-leakages of oil will eventually lead to accelerated engine wear. On Murano Z51 with VQ35DE this is especially critical due to the design of the crankcase ventilation system.

How often should the condition of the gasket be checked?

It is recommended to inspect the gasket at every service (every 15,000 km), as well as when replacing the air filter. A mandatory check is when oil appears in the pipes or when the speed is unstable. On runs over 100,000 km, it is better to replace the gasket preventively.

Can I use sealant instead of gasket?

No! Sealant - only addition to the gasket, but not replacing it. On Murano Z51 An attempt to “fix” an old gasket with sealant will lead to its rapid destruction and the entry of particles into the engine.

What oil should I use after replacing the gasket?

For VQ35DE And QR25DE suitable oil 5W-30 or 5W-40 with permission Nissan. After replacing the gasket, it is recommended complete oil and filter change, since old oil may contain rubber particles.

How long does a new gasket last?

When installed and used correctly:

  • Original gasket - 80,000–120,000 km.
  • High-quality analogues (Fel-Pro, Elring) — 60,000–100,000 km.
  • Budget analogues - 30,000–50,000 km.

The service life is shortened by overheating, aggressive driving or the use of low-quality oil.