Replacing the Nissan Murano timing chain: when is it time to change it and what will happen if it is tightened?

Crossover owners Nissan Murano often encounter the myth about the “indestructibility” of VQ series motors. Indeed, these units are considered one of the best in their class in terms of service life and traction, but they have a critical vulnerability, which dealers are silent about until they fail. We are talking about a gas distribution system, where the chain, unlike the belt, does not require replacement according to regulations, but physically stretches over time. Ignoring this process could leave you with an expensive engine that requires a complete rebuild or replacement.

Many owners Nissan Murano the second and third generations believe that if the motor runs smoothly, then the chain is still “moving”. This is a dangerous misconception. The chain tensioner has a limited life, and the metal itself deforms over time under load. As soon as the tension drops below a critical level, the destruction of the phase shifters and sprockets begins, which entails irreversible consequences for the valve mechanism.

Why the Timing Chain on a Nissan Murano Needs Attention

VQ series motors installed on Nissan Murano (VQ35DE and VQ35HR), are equipped with a complex CVTC variable valve timing system. This system uses a chain not only to transmit rotation from the crankshaft to the camshafts, but also to control the phase shifters. Unlike simple chain drives, here the load is distributed unevenly, and it is the phase shifters that create additional resistance, accelerating wear of the mechanism.

The standard chain life on these engines is from 150 to 200 thousand kilometers, but the actual service life often depends on the quality of the oil and driving style. If you often drive your car in traffic jams or use low-quality lubricant, the service life may be halved. Chain stretch - this is not an instant process, but a gradual increase in step, which begins unnoticed by the driver.

The main problem is that with a significant lengthening of the circuit, phase synchronization is disrupted. The engine ECU tries to compensate for this by moving the phase shifters to extreme positions, which causes them to jam. At this moment hydraulic tensioner cannot cope with the load, and the chain begins to “jump” along the sprockets, destroying their teeth.

Accurate signs of wear and diagnostics

It is possible to identify the problem at an early stage only if you pay close attention to the operation of the engine. The very first and surest sign is a specific metallic clanging or chattering sound that is heard during a cold start. If the sound disappears 2-5 seconds after warming up, this means that hydraulic tensioner It still holds pressure, but can no longer keep the chain taut immediately after stopping the engine.

When the engine is warm, the symptoms change. Vibration at idle, unstable operation, or even loss of power may occur. The engine may begin to stall at traffic lights or fluctuate in speed. In some cases, the dashboard lights up Check Engine with error codes associated with the phase shifters (P0011, P0021, P0014, P0024) indicating a valve timing mismatch.

It is important to understand that visual diagnosis without disassembly is impossible. Even if you see that the chain is not loose, it may already be very stretched. The only way to accurately assess the condition is to check the advance angle of the phase shifters through a diagnostic scanner. If the angle deviates from the norm by more than 5-7 degrees, replacement is required.

⚠️ Attention: If you hear a metallic knock when starting a cold engine, do not try to “warm up” it and continue driving. Every minute of operation in this mode can cost you replacement of valves and piston group.

Difference between VQ35DE and VQ35HR engines

Owners Nissan Murano first generation (2003-2007) got the engine VQ35DE, which is considered more “calm”. It uses one timing chain, but the design of tensioners and phase shifters has its own nuances. This is where the guide strips most often wear out, which over time crack and crumble, falling into the oil pan.

Second generation models (2007-2014) received a motor VQ35HR. The abbreviation HR stands for High Response, but in the context of timing belt it means high load. In this engine, the chain operates under more severe conditions, and the phase shifter sprockets have a different design. Problem with VQ35HR often lies in the rapid wear of dampers, which are made of low quality plastic.

A critical feature of the VQ35HR is the need to replace the chain paired with the phase shifters. If on a VQ35DE you can sometimes get by with just a chain and tensioners, then on an HR motor the old phase shifters are almost guaranteed to fail a short time after replacing the chain. Complex replacement Timing assemblies on an HR motor are standard practice for long engine life.

What's Included in a Quality Replacement Kit

Replacing the timing chain with Nissan Murano is a complex procedure that requires not only skills, but also the right set of spare parts. Saving on components is unacceptable here, since cheap analogues quickly lose their properties. A high-quality kit must include the chain itself, tensioners (hydraulic and mechanical) and dampers (guides).

Particular attention should be paid to gaskets. When disassembling the front end of the engine, all gaskets must be replaced, including the timing cover, water pump and thermostat gaskets. Using sealant instead of factory gaskets often leads to oil leakage after 10-20 thousand kilometers. Also don't forget about asterisks crankshaft and camshafts if they show obvious signs of wear.

• 🔧 Original chain or high-quality analogue (for example, from Mitsuboshi or Gates brands).
• 💧 A complete set of tensioners and dampers for your engine modification.
• 🛡️ A set of gaskets and seals for sealing the front part of the engine.
• 🛢️ Original oil and filter for the first shift after changing.

⚠️ Attention: Never use cheap Chinese copies of sedatives. They are destroyed after only 5,000 km, and plastic gets into the oil pump, causing oil starvation and engine scuffing.

Replacement process and necessary tools

Work to replace the timing chain with Nissan Murano require lifting the car and removing the oil pan, which significantly complicates the process compared to conventional engines. The subframe must be removed or lowered to gain access to the lower tensioners. This is a labor-intensive operation that takes from 8 to 12 hours for a professional craftsman.

The key step is labeling. On VQ engines, it is important to correctly align the marks on the camshaft and crankshaft sprockets. An error of even one tooth can cause the valves to hit the pistons during the first start. To work, you will need special camshaft clamps and tensioner wrenches.

After installing a new chain, it is necessary to check the operation of the hydraulic tensioners. They should operate smoothly and keep the chain taut. When assembling, it is important to observe the tightening torque of the timing cover bolts so as not to deform the aluminum and not break the seal. The use of a torque wrench is mandatory here.

⚠️ Attention: If you plan to change the chain yourself, make sure you have access to original Nissan service documentation. Setting marks on your own without special tools often ends in a major engine overhaul.

How long does it take to replace a timing chain? The process of replacing a timing chain on a Nissan Murano is one of the most labor-intensive operations in repairing Japanese cars. Due to the design of the subframe and the location of the engine, the technician has to remove many components

the oil pan, radiators, alternator, air conditioning compressor and often the subframe itself. On average, a qualified service spends 10-12 hours of pure time on this work. If you see a price that is suspiciously low, most likely the technician did not take into account the time required to remove the subframe or skimped on the quality of the gaskets.

Cost of work and choice of service

Price for replacing timing chain Nissan Murano consists of the cost of spare parts and labor. Spare parts can cost from 30,000 to 60,000 rubles, depending on whether you choose the original or high-quality analogues. Service work usually costs from 25,000 to 40,000 rubles, as it requires high qualifications and special equipment for the subframe.

Don't look for the cheapest deals in garages. An assembly error can cost you tens of thousands of rubles in engine overhaul. It is better to contact specialized services that have experience working specifically with VQ series motors. They know all the “sores” and nuances of assembly, which guarantees a long service life of the new unit.

Component	Original (approximate price)	High-quality analogue	Recommendation
Timing chain	15 000 - 20 000 ₽	8 000 - 12 000 ₽	Original or Mitsuboshi
Hydraulic tensioner	4 500 - 6 000 ₽	2 500 - 3 500 ₽	Must be original
Calmizers (set)	8 000 - 10 000 ₽	3 000 - 5 000 ₽	Original (plastic is better)
Phase shifters (pair)	35 000 - 50 000 ₽	20 000 - 25 000 ₽	With mileage >150 thousand km

Frequent mistakes and myths during maintenance

One of the main mistakes owners make is expecting the chain to “go forever.” Many people drive up to 250-300 thousand kilometers, hoping for chance, and as a result they end up with destroyed phase shifters and bent valves. Preventive replacement at 150-180 thousand kilometers - this is the most reasonable step that will save you from unexpected expenses.

Another mistake is replacing only the chain without replacing the tensioners and dampers. Old tensioners often wear out and cannot provide proper tension to the new chain, which will lead to re-stretching after a short period of time. Also, sealant cannot be used where gaskets are provided, as this will disrupt the geometry of the connections.

There is a myth that Nissan Murano you can simply change the “upper” part of the chain. This is impossible, since the chain is solid and goes through the entire engine. A complete replacement is the only correct option. Ignoring this rule will result in the new mechanism not working in sync with the old worn parts.

FAQ: Questions and answers

At what mileage should the timing chain be changed on a Nissan Murano?

There are no official regulations, but experts recommend carrying out diagnostics after 150,000 km. Preventative replacement is recommended around 180,000 - 200,000 km, especially if you hear noise during cold starts.

Is it possible to drive with a noisy timing chain?

For a short time - yes, if the noise appears only when it is cold and disappears after a couple of seconds. But this is a signal that the tensioner is no longer holding. Long-term operation with noise leads to the destruction of phase shifters and sprockets.

Do I need to change the phase shifters along with the circuit?

If the car's mileage exceeds 150,000 km, it is strongly recommended to replace the phase shifters along with the chain. Old phase shifters often cannot hold new phases, and the Check Engine error will return very quickly.

How long does it take to replace a timing chain?

The process takes from 8 to 12 hours of work. This is due to the difficulty of accessing the lower tensioners and the need to remove the subframe or oil pan.

What happens if the chain breaks?

The VQ35DE and VQ35HR engines are “plug-in”, that is, when the valve circuit breaks, they hit the pistons. This leads to serious damage to the cylinder head, pistons and, as a result, to expensive major repairs.