Mitsubishi 4g92 engine

On many Japanese-made cars, you can find the Mitsubishi 4g92 engine. This motor model has a number of advantages, which allowed it to stay in the industry for a long period of time.

This power unit was created for installation on new generations of Mitsubishi Lancer and Mirage. It was first installed on production models in 1991.

Technologically similar to the 4g93 motor, but there are some differences. It was they who allowed the engine to become so popular, as a result, it was used for a whole decade, and it can be found on many models of Japanese cars.

Engine description

As is clear from the markings, 4 cylinders are used here, this is the standard layout for Japanese cars. Moreover, it must be taken into account that here, in comparison with the original motor, the piston stroke was changed, it was reduced to 77,5 mm. This made it possible to reduce the height of the cylinder block to 243,5 mm, limiting the possibilities of engine tuning. But, at the same time, the designers won in size, which made it possible to make the motor more compact. The total weight of this node was also reduced, which had a positive effect on the overall dynamics.

This power unit was developed in the design departments of Mitsubishi Motors Corporation. They were the ones who developed this engine. They are also the main producers. Also, this engine can be produced by the Kyoto engine plant, which is part of the concern, but is often indicated as an individual manufacturer when marking parts and assemblies.

This motor was produced until 2003, after which it gave way to more advanced and modern power units. The last car equipped with this engine was the first generation Mitsubishi Carisma. At the same time, it was the base unit, which was installed in the main version of the model.

Technical specifications

Important is the general technical characteristics of this engine. So you can more accurately understand the features of this power unit. It should be noted that it is the technical features of the motor that make it one of the most reliable and popular among drivers. Consider the main nuances.

• The cylinder block is made of cast iron.
• On the first engines, the power system was carbureted, but later they began to use an injector, which further increased efficiency.
• The unit uses a scheme with 16 valves.
• Engine displacement 1,6.
• The use of AI-95 gasoline is considered optimal, but in practice, engines work fine on AI-92.
• EURO 3.
• Fuel consumption. In urban mode - 10,1 liters. In the suburban - 7,4 liters.
• The operating temperature of the engine is 90-95°C.

In practice, the resource of the power unit ranges from 200-250 thousand kilometers. It must be understood that this characteristic is very conditional. Much depends on the characteristics of the operation of the vehicle, care is especially affected. With proper maintenance, as well as in the absence of situations when the motor operates in exorbitant modes, the resource can increase by one and a half times.

It is also worth noting that the engine could have different gas distribution systems. This is a rarity in the automotive industry, but in this case, this approach did not adversely affect efficiency and reliability. In the basic version, a single-shaft cylinder head was installed with a SOHC distribution system. More powerful and modern versions used a DOHC twin cam head.

All versions use Mivec gas distribution technology. It was first used here. This type of timing allows you to optimize the operation of the internal combustion engine. At low speeds, the combustion of the mixture stabilizes.

At higher valve opening times, the efficiency increases. Such a system allows you to get the same efficiency in all modes of operation.

At the moment, when registering, they do not look at the engine numbers, but in order to be guaranteed to avoid problems, for example, with a stolen engine, it is still better to check it yourself. The engine number is located just below the thermostat. There, on the engine, there is a platform about 15 cm high. The serial number of the motor is stamped there. From it you can find out the exact history of the power unit. If it is sanded, most likely the car or engine has a criminal record. You can see what the room looks like in the photo.

Motor reliability

The main advantage of this engine, according to most motorists, is its reliability. That is why, the owners of Japanese women often try to install it on their cars. After all, this will allow you to practically forget about a number of difficulties that are associated with Japanese power units.

First of all, this engine model easily tolerates low-quality fuel. Despite the fact that the manufacturer clearly indicated that the use of AI-95 gasoline is optimal, in practice the engine works fine on AI-92, and it is far from the best quality. This allows you to significantly increase the life of the motor in domestic conditions.

The power unit has proven itself in a variety of situations. It tolerates cold starts in winter well, there are no complaints about the quality of the start.

At the same time, there are no unpleasant consequences in the form of damage to the crankshaft, and other malfunctions that usually occur after winter starts.

Injection options do not cause electrical problems, which is not typical for cars of those years of production. The control unit does its job very well. Sensors work for a long time and without failures.

Maintainability

Despite the high reliability, do not forget that this motor is still not new, so it will not be possible to do without repairs. Here you need to understand that first of all it is necessary to pay attention to maintenance. For this engine, the following intervals are considered optimal.

• Oil change 10000 (preferably every 5000) kilometers.
• Valve adjustment every 50 miles (with one camshaft).
• Replacing the timing belt and rollers after 90000 kilometers.

These are the main works that will allow your car to serve for a long time and without breakdowns. Let's analyze them in more detail.

The valves can be adjusted both on a cold engine and on a hot one, the main thing is that the recommended verification scheme is maintained. On twin-shaft motors, valves with a hydraulic compensator were installed; they do not need to be adjusted. Valve clearances should be as follows.

With a warm engine:

• inlet - 0,2 mm;
• release - 0,3 mm.

For cold:

• inlet - 0,1 mm;
• release - 0,1 mm.

When replacing the belt, check how the mark is located on the pulley. This will allow you to optimally adjust the camshaft position sensor. You will also avoid damage to the pistons.

Also quite often there is a problem when the speed floats. This behavior can occur even for no apparent reason. In practice, the reasons for this may be the following.

• Need to change spark plugs. Due to soot, the resulting spark may not be strong enough, as a result, malfunctions in the operation of the internal combustion engine are observed.
• Sometimes the throttle valve may become stuck due to clogging. In this case, you need to clean it.
• A failed idle speed controller could also be the cause.
• If the above does not help, you should check the distributor (for carburetor engines).

Sometimes drivers may experience an inability to start the engine. Usually the starter is the cause. It will need to be removed and repaired. You can find a sufficient number of videos on this topic.

If a major overhaul is needed, be sure to select repair pistons based on the current size. You can use analogues, reviews about them are quite good.

Tuning

Usually, various options for improvements are used here, allowing you to get an increase in power. But, the choice of options to achieve the task is small.

The standard option, when other piston and connecting rod sizes are selected, does not work here. Engineers have already significantly reduced the height of the pistons, which allowed them to solve their problems, but at the same time complicate the life of lovers of improvements.

Chip tuning remains the only viable option. In fact, this is a change in the software of the control unit to a variant with other characteristics. As a result, you can increase the power by 15 hp.

SWAP manual transmission is also possible. This allows you to increase the efficiency of power transfer to the wheels.

What kind of oil to pour

It is worth remembering that the motor quite actively eats up lubricant. Therefore, the oil level must be checked regularly. Also, always pay attention to the oil pressure gauge, it shows how full the oil crankcase is.

When changing the oil, it may be necessary to clean the sump. This is usually required every 30 thousand kilometers. Failure to do so may result in operational problems. For this model of internal combustion engine, you can use a variety of brands of lubricant. The use of synthetics is considered optimal. Also, the selection is made taking into account the season. Here is a sample list of acceptable oils:

• 5W-30;
• 5W-40;
• 5W-50;
• 10W-30;
• 10W-40;
• 10W-50;
• 15W-40;
• 15W-50;
• 20W-40;
• 20W-50.

What cars is

Drivers often wonder on which models this power unit can be found. The fact is that it turned out to be successful, so it was installed on many cars. This often leads to some confusion when such motors can be seen on rather unexpected specimens.

Here is a list of models where this engine was used:

• Mitsubishi Karisma;
• Mitsubishi Colt;
• Mitsubishi Lancer V;
• Mitsubishi Mirage.

You can meet these motors on cars produced from 1991 to 2003.