YD25DDTi- This is one of the most common diesel-type propulsion units, which were installed mainly on Nissan cars. The engine has excellent performance and endurance, which is reflected in its unique design.

The YD25DDTi engine is installed on:

• Nissan Pathfinder Navara
• Nissan Navara

Engine YD25DDTi

The YD25DDTi engine is a unique development from Japanese developers, which literally conquered the whole world with its outstanding performance. For example, take into account the fuel consumption, which is only 10 liters in the combined cycle in the city with a volume of 2.5 liters. Not many power plants can boast of such data. Despite this, he is able to accelerate an almost 3-ton car to 100 km / h in just 12.5 seconds.

The Nissan YD25DDTi engine is a 4-cylinder power plant that is equipped with a common rail, catalytic converter and intercooler. The presence of all this equipment allows you to increase the power of the unit to 174 hp. at a maximum speed of up to 175 km/h. And you will agree that this is a considerable number for a budget class car.

Engine on Nissan YD25DDTi - incredible power

The Nissan YD25DDTi engine is perfectly balanced. Despite the use of diesel fuel, the unit does not vibrate during operation, although a single chain is used. The secret lies in the design. It uses a fundamentally new technology. 2 balanced shafts rotate in opposite directions. This allows you to compensate for the beats that occur during operation and there is no need to use a two-row timing chain, which was also an unbalancing device.

Buy spare parts for the YD25DDTi engine

To order a spare part for the Nissan YD25DDTi engine, you need to contact our specialist. He will advise you on any issues and offer the best options for units.

We offer only proven and compliant blocks. Moreover, each YD25DDTi engine on the Nissan Navara underwent a catalyst replacement, which usually fails after 200 thousand.

The YD25DDTi diesel engine has excellent performance that meets all modern requirements. It provides the necessary torque, which is enough to accelerate a 2-ton car.

When ordering spare parts for Nissan Partfinder YD25DDTi in our store, you will receive spare parts that will last for many years. All products carry a manufacturer's warranty. We offer only proven spare parts for the engine and provide a quality guarantee.
When you re-order spare parts and repair kits for the YD25DDTi engine, a discount is provided.

The production of power units of this family began about 65 years ago in 1952. The first model belonged to the in-line variety and was equipped with 4 cylinders. The volume ranged from 0.9 to 1.1 liters.

There was a DOHC system, that is, two camshafts were located in the cylinder head. This modification was in mass production until 1966, until a more advanced engine came to replace it.

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In 1965, power units with increased power characteristics began to roll off the assembly line. ICE has undergone many minor improvements. It was produced in several modifications, due to which the working volume ranged from 1.3 to 2 liters.

The engine has become more widespread compared to its predecessor, as it has become more reliable and durable.

It could be used in harsh operating conditions, high loads did not affect performance with proper maintenance. The modification was discontinued in 1982.

The next stage of evolution was the power unit, which rolled off the assembly line in 1983. It belonged to the in-line variety, but unlike its predecessors, it had 6 cylinders. The model included a DOHC system and could produce direct fuel injection. At that time there were several varieties. Their working volume ranged from 3.3 to 4.6 liters. Significantly increased the power and resource of the motor. It was very popular at the time and was in mass production until 1995. It was replaced by more advanced models.

Specifications

The Nissan yd25ddti engine is a high power diesel powertrain with a medium displacement.

Characteristic	Description
Piston stroke inside the cylinder.	100 mm.
The working volume of the power unit.	2488 cubic centimeters.
Compression ratio.	15.
Maximum engine power.	Varies from 129 to 190 depending on the presence of turbocharging.
diameter of each cylinder.	89 mm.
The highest torque.	356 N*m at 2000 rpm.
A type of direct fuel injection system.	Electronic.
The type of fuel used in the powertrain.	Diesel.
Engine type.	Row.
Number of cylinders.	4.
Availability of DOHC system.	Present.
Fuel consumption.	It fluctuates from 7.7 to 8.3 liters per 100 km.
Sample resource.	About 300,000 km.

The listed characteristics determine the cost of the engine and the scope. The value of the resource is not constant. It can be increased at least twice if you choose the right lubricant, perform maintenance and repairs in a timely manner.

It is worth noting that many motorists who do not have the necessary experience have difficulty finding the number of the power unit under the hood. They should be aware that the desired set of numbers is most likely located under the intake manifold cover.

It can be difficult to see it because of the dirt that has formed, so before searching, the motor must be thoroughly rinsed or use a special metal brush.

Reliability

The Nissan yd25ddti engine is a fairly reliable power unit that can withstand harsh operating conditions. It will work flawlessly with timely maintenance and regular repairs. Drivers who do not properly monitor the condition of the engine may experience the following problems:

1. Stretching the timing chain. A similar phenomenon is most often observed after 150,000 km of run. Characteristic signs of such a problem are difficult starting of a cold engine. You can fix the problem by replacing the stretched chain with a new one.
2. Clogging of the throttle chamber. This problem is often found in new-style power units. The occurrence of such a problem leads to an emergency start of the control unit. As a result, the car stops responding to pressing the gas pedal. Ignoring the problem leads to electronic failure and other related defects with a high degree of probability.
3. Damage to the cylinder head, which can be caused by high loads in continuous operation. The elimination of such a breakdown will require tangible costs. A characteristic symptom of a problem is whitish smoke from the exhaust pipe, condensation at the outlet, sooting spark plugs and an elevated oil level.

The listed malfunctions are most common in the Nissan yd25ddti engine. They occur quite rarely with inept exploitation. Their elimination at the service station does not take much time, but sometimes it requires a lot of money as a motorist, and time.

maintainability

Troubleshooting common faults does not cause problems for experienced motorists who have experience in such matters and relevant knowledge. For full maintenance in a personal garage, you will have to acquire some equipment.

The driver can make computer diagnostics and detect problems on his own. After that, you can do the repair yourself or contact a specialized car service.

If the owner of the vehicle decided to make independent repairs, then he must be absolutely confident in his abilities. Otherwise, disassembling the motor with your own hands and trying to repair or replace components is not recommended. The fact is that inept intervention or improper assembly of the power unit can lead to problems that cannot be eliminated on their own.

Moreover, in order to return the internal combustion engine to working capacity, significant sums will have to be paid to specialists. It is not a fact that service station employees will be able to repair the damage caused by inept repairs. In the worst case, you will have to purchase a new power unit, the cost of which cannot be called small.

What oil to pour

The right choice of lubricant will maximize the stabilization of the Nissan yd25ddti engine and increase the service life. For this power unit, oil with the marking is well suited:

1. 0W40, which is ideal for use in the Russian winter. It is made using special technology. The composition includes a special set of additives, which may be of a synthetic, semi-synthetic or mineral variety. Lubrication can significantly increase the operating life of the motor by preventing premature wear of rubbing components. Even at low temperatures, the internal combustion engine continues to function stably.
2. It is a synthetic lubricant that ensures stable operation of the power unit in adverse conditions. It is able to minimize the negative impact on the motor components. The use of such an oil will ensure long-term operation at idle, stable operation when the car gets into traffic jams, and efficient operation of the vehicle over short distances.
3. 5w40, which is a low volatility engine oil. The composition includes additives, which makes it possible to significantly reduce friction between the surfaces of parts. This reduces fuel consumption and increases engine performance. The lubricant retains its operational properties for a long time, replacement can be done rarely. It helps to reduce the level of vibration, so that the internal combustion engine runs much quieter.
4. It is popular among a large number of motorists, thanks to the natural substances that make up the composition. The basis for the manufacture is paraffin, combined with the use of special technologies. The lubricant includes special additives that make it universal. It can be applied all year round. The use of such oil prevents premature wear of internal combustion engine elements, ensures the absence of deposits on the bottom of the crankcase, and also prevents the formation of carbon deposits.

Each type of lubricant has its own characteristics that must be considered when buying.

On what machines is it installed

The Nissan yd25ddti engine is widely used due to its high power performance and reliability. It was used to install on:

1. Nissan Bassara. The car is a minivan with good performance characteristics. The machine rarely breaks down, but requires periodic replacement of some consumables.
2. Nissan Navara, which is a modern frame SUV of Japanese origin. It is safe, comfortable, fast, and also has high power. The vehicle effectively overcomes uneven terrain. The car is a worthy competitor to many American pickups. It is designed for 5 seats and is equipped with a large and functional trunk.
3. Nissan NV350 Caravan. It is a minibus of Japanese origin. The machine can be equipped with both a diesel and a large-capacity gasoline engine. The vehicle has a 5-speed manual gearbox. The maximum load capacity varies from 950 to 1250 kg.
4. Nissan Pathfinder, which is a full-size crossover that was born in 1985. The model is of Japanese origin and has high power.
5. Nissan Presage. The vehicle is a minivan equipped with three rows of seats. The role of the power unit is played by the engine, which includes 6 cylinders.
6. Nissan Serena. The machine has a design feature. The fact is that the motor takes up space in the cab, as it is located under the driver's seat.

Each car has certain features, but they are united by a power unit that makes each vehicle powerful and reliable. With skillful operation and timely maintenance, each vehicle will last a long time.

Nissan YD25 engine

Characteristics of the YD25DDTi engine

Production	Yokohama plant
Engine brand	YD25
Release years	1998-present
Block material	cast iron
engine's type	diesel
Configuration	in-line
Number of cylinders	4
Valves per cylinder	4
Piston stroke, mm	100
Cylinder diameter, mm	89
Compression ratio	15.0 16.5 17.5 18.0
Engine volume, cc	2488
Engine power, hp / rpm	133/4000 144/4000 150/4000 171/4000 190/4000
Torque, Nm/rpm	304/2000 356/2000 280/1800 403/2000 450/2000
Environmental regulations	Euro 3 Euro 4 Euro 5
Turbocharger	IHI RHF4H Garrett GT1749V Garrett GT2056V BorgWarner BV45
Engine weight, kg	200
Fuel consumption, l/100 km (for Pathfinder) - city - track - mixed.	13.2 8.3 10.1
Oil consumption, g/1000 km	up to 500
Engine oil	5W-20 5W-30 10W-30 10W-40 10W-50 15W-50 20W-40 20W-50
How much oil is in the engine, l	6.9 7.6 (2007+)
Oil change is carried out, km	20000 (better than 10000)
Operating temperature of the engine, hail.	-
Engine resource, thousand km - according to the plant - on practice	- 300+
Tuning, HP - potential - no loss of resource	- -
The engine was installed	Nissan Murano Nissan Pathfinder Nissan Bassara Nissan Navara Nissan NV350 Nissan Presage Nissan Serena Nissan Primastar/Renault Trafic/Opel Vivaro

Reliability, problems and repair of the YD25DDTi engine

Production of the diesel YD25 was launched in mid-1998, and the first car with it was the Nissan Presage. This motor replaced the CD20 and TD25 on some vehicles. The cylinder block here is in-line 4-cylinder, cast iron, with a cylinder diameter of 89 mm. Inside the block is a crankshaft with a piston stroke of 100 mm, and the length of the connecting rods is 154.5 mm. All this gives 2.5 liters of working volume.

An aluminum head with two camshafts and 4 valves per cylinder covers the block.The intake valves are 28mm in diameter, the exhaust valves are 26mm, and the valve stem thickness is 6mm.
This motor needs periodic adjustment of valve clearances, but this is recommended in case of noise.
Valve clearances on a cold engine are as follows: inlet 0.24-0.32 mm, outlet 0.26-0.34 mm. Clearances on a hot engine: inlet 0.29-0.37 mm, outlet 0.33-0.41 mm.
A chain is used in the timing drive, it serves an average of 250 thousand km, sometimes more.

The first version of the YD25DDTi diesel engine came with direct fuel injection and a Bosch VP44 injection pump, and a Garrett GT1749V with an intercooler worked here as a turbocharger. The return of the motor was at the level of 150 hp. at 4000 rpm, and a torque of 280 Nm at 1800 rpm.
Then, in 2001, the YD25 came with a common rail, with an IHI RHF4H turbo and intercooler, the compression ratio here is 18 (instead of 17.5). The power of this engine is 133 hp. at 4000 rpm, torque 304 Nm at 2000 rpm. Vehicles with YD25DDTi common rail carry the designation dCi.

Since 2005, the production of the YD25DDTi diesel engine with a Garrett GT2056V turbine and a compression ratio of 16.5 began. The output of the motor has increased to 174 hp. at 4000 rpm, and a torque of 403 Nm at 2000 rpm. In 2007, this engine was transferred to Euro-4, and the power dropped to 171 hp. at 4000 rpm, the torque remained unchanged.
The version for the rear-wheel drive Navara featured 144 hp. at 4000 rpm.
In 2010, a Euro 5 version appeared with a BorgWarner BV45 turbine and an intercooler. Its power has increased to 190 hp. at 4000 rpm, and torque up to 450 Nm at 2000 rpm.

The EGR exhaust gas recirculation system allows you to increase the environmental class of the YD25 diesel engine.

Based on this 2.5-liter engine, the younger brother YD22 was released in 1999.
The production of this motor continues today, but, after a while, the YS23DDTT engine will take its place.

Problems and disadvantages of diesel engines Nissan YD25DDTi

The YD25 motor, with proper care, regular maintenance and the use of high-quality oil and fuel, is quite reliable and hassle-free. The nozzles here serve about 150 thousand km, the turbine resource is more than 250-300 thousand km, it would also be nice to systematically clean the EGR valve - soot accumulates quite quickly. With adequate care, the resource of the YD25DDTi engine exceeds 300 thousand km.

YD25 engine tuning

Chip tuning

More evil firmware of the control unit allows you to get 210 hp. on engines with a power of 170 hp, while the torque will increase to 460-490 Nm. Motors with a return of 190 hp. show results even better: up to 230 hp. and 520-540 Nm of torque.
The simplest versions of the Navara for 133 hp. they are chipped at 160-165 hp, and the increase in torque reaches 60 Nm.

The automotive industry in Japan is very well developed, which is not a secret for people who are more or less versed in the automotive industry. One of the mastodons in the creation of cars and components for them is the well-known auto concern Nissan. A large number of not only cars, but also power plants came off the assembly lines of this manufacturer. In today's article, our resource would like to pay attention to one of the famous engines from Nissan - the YD25DDTI diesel unit. About the principles of building this engine, its technical features and repair, read below.

A few words about YD25DDTI

The YD25DDTI engine is a typical Nissan development, during which the Japanese followed the basic principles of their activities:

• Creation of motors with good functionality and high reliability;
• Support for an acceptable level of ergonomics.

In the stock state, the YD25DDTI engine is an ordinary diesel engine with:

• Cast iron block with 4 cylinders;
• Aluminum cylinder head (cylinder head);
• Timing chain drive on two camshafts;
• Forged connecting rods, flywheels, pistons and crankshaft;
• High quality and reliable attachments.

The only thing you can find fault with in the design of the YD25DDTI engines is the approach to their fuel supply. The fact is that, by switching to DOHC with direct injection, Nissan deliberately abandoned the “common-rail” system, which made it possible to significantly save fuel, so even in the most gentle mode of operation, the YD25DDTI engine usually “eats” at least 9-10 liters of diesel fuel . However, we note that the reliability of the fuel system has improved markedly compared to the predecessors of the unit in question.

Special attention should be paid to the fact that the YD25DDTI has a turbocharger, overhead camshafts and an intercooler. This configuration allows you to squeeze the maximum out of the volume of these diesels. Partially, the YD25s were also upgraded in terms of the exhaust system, having received the EURO-4 environmental standard. These motors were installed and are being installed in minibuses up to 8 seats and light vans. However, some motorists quite successfully adapt them to both light SUVs and crossovers, working with contractors. Now YD25DDTI motors are produced extremely rarely and are practically discontinued. Despite this, the relevance of such installations is still very high.

Engine Service Schedule

In general, the YD25DDTI engines represent a rather high-quality class of installations. Breakdowns of those, of course, happen, but their frequency is extremely low and will delight almost all motorists. Despite this, not all owners of YD25DDTI motors can achieve high operating efficiency. First of all, this is due to non-compliance with the maintenance schedule established by the manufacturer. The manufacturer of the installations does not require anything supernatural from the owners, but only strongly recommends that you follow the profile manuals that determine the need:

• Timely and complete replacement of lubricant in the internal combustion engine cavities. What oil to pour into YD25DDTI engines? It's easy to say. Any that fits the standard - 10W-30 HD / DPF. It is advisable to give preference to Nissan products. The normal interval for changing lubricants is 8,000 kilometers. In addition to engine oil in YD25DDTI, one should not forget about changing the transmission. This procedure should be implemented every 45-60,000 kilometers;
• Change of all motor consumables. These include:
  • air filter;
  • oil filter;
  • elements of the cooling system and other internal combustion engine components (pump, gaskets, and the like).

  According to official Nissan manuals, the marked parts are checked and replaced every 30-40,000 kilometers;

• Replacement spark plugs. The normal frequency for this procedure is 80,000-100,000 kilometers. Candles on YD25DDTI go, as in the case of oil, absolutely any. The main thing is that they correspond to the motor markings and the corresponding glow number. Do not forget that for diesel engines, spark plugs, or rather glow plugs, have a specific, but extremely important purpose, so their selection and replacement should be treated with the proper level of responsibility.

In addition to the above measures, we must not forget about:

• valve adjustment (every 20,000 kilometers);
• preventive compression measurement (every 10,000 kilometers);
• checking the main components of the motors for wear and proper functioning: intake / exhaust manifolds, shafts, pistons, ignition system, etc. (every 50-70,000 kilometers).

When implementing internal combustion engine maintenance procedures, it is important to do everything efficiently and competently. Do not forget that the final resource of the motor depends on this.

Frequent malfunctions and their repair

Engines YD25DDTI, which has been said more than once above, are of good quality. It is difficult to single out any typical breakdowns of these internal combustion engines. It can be precisely stated that they do not bend the valves, do not knock and often “do not burn through”. However, the turbocharger and fuel system sometimes hitches. They are expressed in the loss of power "at the top". Often, when driving at a speed of 120-130 kilometers per hour, the YD25DDTI motors refuse to gain further. Naturally, with the existing functionality, such a state of affairs is not the norm and requires due attention.

Due to the complexity of Japanese units, do-it-yourself repairs are best excluded. It is much more rational to send the engine for diagnostics to a specialized Nissan center, where specialists will work with it properly. Of course, you will have to pay n-th amount of funds for such manipulations, but the result is usually worth it. At a minimum, it is important to resort to the implementation of measures of this kind when overhauling YD25DDTI engines. Do not forget that the overhaul of these units is done every 150-200,000 kilometers. The earlier the better. With the proper approach to repair, operation and maintenance, it is quite possible to squeeze 500-600,000 kilometers from the YD25DDTI.

Motor tuning

To say that the YD25DDTI engines are designed for modernization is definitely not right. Earlier it was said about their "labor" purpose, which by default does not involve profile tuning. Despite this, with a competent approach and a high-quality injection of funds, it is possible to increase the power of these internal combustion engines by about a third of the stock state. The implementation of such modernization lies through:

• high-quality forcing;
• cylinder bore;
• hardware replacement of the internal elements of the motor with more functional and high-quality ones.

Again, the YD25DDTI device does not imply any intelligible tuning. But if it is necessary - why not try?

List of vehicles equipped with YD25DDTI

As mentioned above, the goal of creating YD25DDTI installations was to produce real and relatively economical "tractors" for medium-weight vehicles - vans, small buses, minivans. In terms of their application, the considered motors did not leave this goal. Mostly, the serial use of YD25DDTI motors has spread to:

• Nissan Bassara (minivan produced by the Japanese from 1999 to 2003);
• Nissan Vanette Serena (van still assembled in Japan, YD25s used on it from 1999-2006).

Today, serial production of YD25DDTI engines is not practiced. Among motorists, they are used exclusively in the form of "contract workers" and are installed in the same medium-weight cars. Due to the excellent characteristics, the relevance of using such motors is still high.

Technical data about the power plant

At the end of today's article, let's pay attention to the technical characteristics of the YD25DDTI engine. Since this motor is produced in one formation, the description of the basic parameters is always unchanged. Their complete list is shown in the following table:

Manufacturer	Nissan
Motor brand	YD25DDTI
Years of production	1999-present
cylinder head	Aluminum
Nutrition	Direct injection, DOHC
Construction scheme (cylinder operation order)	Inline (1-3-4-2)
Number of cylinders (valves per cylinder)	4 (4)
Piston stroke, mm	100
Cylinder diameter, mm	89
Compression ratio, bar	17
Engine volume, cu. cm	2488
Power, hp / rpm	174/4 000
Torque, Nm/rpm	28,5/1 800
Fuel	Diesel
Environmental regulations	EURO-4
Engine weight, kg	—
Fuel consumption per 100 km - track - mixed mode
Oil consumption, grams per 1000 km	700
Lubrication standard	10W-30 HD/DPF
Volume of oil channels, l	4,5
Oil change interval, km	8 000
Engine resource, km	600 000
Upgrading options	available, potential - 230 hp
Equipped Models	Nissan Bassara Nissan Vanette Serena

Perhaps, on a note of consideration of the technical functionality of the YD25DDTI motors, we will finish. We hope that the presented material was useful for you and gave answers to your questions. Good luck on the roads!

If you have any questions - leave them in the comments below the article. We or our visitors will be happy to answer them.