Mitsubishi 4g15 engine
Content
The Mitsubishi 4g15 ICE engine is a reliable unit from Mitsubishi. The unit was designed and produced for the first time more than 20 years ago. It was installed until 2010 in the Lancer, until 2012 - in the Colt and other car models from the Japanese automaker. The characteristics of the engine made it possible to move comfortably in the city and on long hauls and highways.
History of occurrence and design features
The 4g15 engine has proven itself among motorists. The manual will allow you to carry out repairs with your own hands, including major repairs. Self-diagnosis will not cause difficulties, a minimum of knowledge and special devices is required. The engine has a number of advantages even over modern analogues. Fuel consumption is relatively low.
4g15 dohc 16v is a slightly modified 4G13 engine. Design features and borrowings from other motors:
- the design of the cylinder block was used from a 1.3 liter engine, 4g15 bored out for a 75.5 mm piston;
- originally used SOHC 12V - a model with 12 valves, later the design was changed to a 16 valve model (DOHC 16V, two-shaft);
- there are no hydraulic compensators, the valves are adjusted once every 1 thousand km according to the regulations (more often the adjustment is carried out only after the occurrence of knocks in the internal combustion engine);
- individual modifications were supplied with variators;
- produced in two versions: atmospheric and turbo;
- chip tuning possible;
- the model with a variator is quite reliable, there are no problems typical for automatic transmissions.
Standard valve clearances on a hot engine:
- inlet - 0.15 mm;
- outlet - 0.25 mm.
On a cold engine, the clearance parameters differ:
- inlet - 0.07 mm;
- outlet - 0.17 mm.
The diagram is shown below:
The timing drive of this motor uses a belt designed to be replaced after 100 km. In the event of a break, the valve bends (repair will be needed), there is a need for serious financial investments. When replacing the belt, it is better to use the original one. The process requires installation according to special marks (using a camshaft gear). Various modifications were equipped with a carburetor or an injector; nozzle cleaning is rarely required. Some models were equipped with a special GDI injection.
For the most part, reviews of all modifications are positive. Some 4g15 models were equipped with a special MIVEC gas distribution system. There was a 4g15 to 4g15t swap. Graphs of the crankshaft speed in an engine equipped with MIVEC technology:
The latest releases were also supplied with oil nozzles and pressurization. Similar models were installed in cars:
- Mitsubishi Colt Ralliart;
- Smart Forfus
Compression 4g15 has good performance even with high mileage, but if there is a quality service, a timely oil change. There are modifications with 12 valves (12 V). On the Colt, after the swap, the engine developed power from 147 to 180 hp. On Smart, the maximum figure is more modest - 177 hp. The gearbox could be used automatic transmission or mechanical (for example, Lancer). There are no difficulties with the purchase of spare parts, which simplifies repairs.
In which car models was it installed
Due to its versatility and performance, the engine was used in various Mitsubishi car models. The following machines were sold on the territory of the Russian Federation and in European countries:
Mitsubishi Colt:
- until 2012 - the second restyling, 6th generation, hatchback;
- until 2008 - restyling, hatchback, 6th generation, Z20;
- until 2004 - hatchback, 6th generation, Z20;
Mitsubishi Colt Plus:
- until 2012 - a restyled version, station wagon, 6th generation;
- until 2006 - station wagon, 6th generation;
Mitsubishi Lancer for the Japanese market was also supplied with these engines:
- Mitsubishi Lancer - 2 restyling, station wagon with 6 doors, CS (until 2007, mivec 4g15 was installed);
- Mitsubishi Lancer - 2 restyling, 6th generation sedan, CS and others (ck2a 4g15).
Mitsubishi Lancer for Europe was also produced with this engine. The difference was in the appearance of the car and the interior (dashboard, other). But only until 1988 - a 3rd generation sedan, C12V, C37V. Installation was also carried out in Tsediya. Mitsubishi Lancer Cedia CS2A for Europe in this configuration was produced in 2000 to 2003. This is a sixth generation sedan.
A separate line was the model Mitsubishi Libero (Libero). The 4g15 MPI engine was used in three different models. All of them were station wagons, the first generation. They were equipped with this engine Mitsubishi Mirage, as well as Mirage Dingo. Many of the models listed above are still in production today. But the engine was replaced with another, more modern one.
Technical characteristics of the engine, its resource
The 4g15 contract engine has an impressive resource, therefore, in case of serious breakdowns (“camshaft led”, valves bent or otherwise), it makes sense to simply purchase another motor - its cost is low. Contract engines from Japan, as a rule, are serviced only in service centers, after installation they do not require adjustment. The characteristics of the motor depend on the set ignition, injection system (carburetor, injector). Parameters of a standard 4g15 engine with a power of 1.5 l:
| Parameter | Value |
|---|---|
| Winemaking | Mizushima plant |
| Engine make | Orion 4G1 |
| Years of manufacture of the motor | 1983 to present |
| Fuel supply system | With the help of the carburetor and the injector, depending on the modifications |
| Number of cylinders | 4 piece. |
| How many valves per cylinder | ¾ |
| Piston parameters, stroke (piston rings are used), mm | 82 |
| Cylinder diameter, mm | 75.5 |
| Compression ratio | 09.09.2005 |
| Engine volume, cm 3 | 1468 |
| Engine power - hp / rpm | TBU |
| Torque | 132 – 245 N×m/4250-3500 rpm. |
| Fuel used | 92-95 |
| Environmental Compliance | Euro 5 |
| Engine weight, in kg | 115 (dry weight, without various filling capacities) |
| Fuel consumption, liters per 100 kilometers | In the city - 8.2 l On the track - 5.4 l Mixed flow - 6.4 |
| Consumption of oil, lubricants grams per 1 km | Up to 1 000 |
| Oil used in the engine | 5W-20 10W-40 5W-30 |
| Refueling volume in the engine, oils | 3.3 l |
| How much to fill when replacing | 3 l |
| How often do you need to change the oil? | At least once every 1 thousand km, the optimal solution is once every 10 thousand km |
| Operating temperature conditions of the engine | - |
| Engine resource in thousand km | Factory data missing In practice, it is 250-300 thousand km |
| Replacement of antifreeze | Depending on the type used |
| Antifreeze volume | From 5 to 6 liters depending on the modification |
The resource of the engine depends simultaneously on a number of factors. At the same time, the maximum resource of 300 thousand km is achieved by a large percentage of the produced 4g15 units. The indicator is achieved by high-quality parts, reliable assembly and production control. The main points influencing the operation include:
- terms of Use;
- frequency of changing oil, filters (including fuel);
- diagnostics;
- tuning - increased power reduces the life of the motor;
- the use of pre-heating (for many models of machines there may be an installation of antifreeze heating).
Possible engine malfunctions 4g15
The 4g15 engine and its analogues have a standard list of faults - the likelihood of which exists. For example, if a 4g15 to 4g93t swap is performed, then the list of possible problems will remain standard. The reasons for the occurrence of such and the options for eliminating them are typical, trivial. Many problems can be prevented in advance by periodic diagnostics, timely replacement of the oil filter, compression check.
The main types of engine malfunctions 4g15:
- shows incorrect temperature sensor data;
- failure of the 4g15 switch, distributor;
- lost idling;
- increased vibrations - and at different engine speeds;
- difficulties with starting to move from a place (as a rule, these are problems with the flywheel petals);
- Difficulty starting the engine;
- increased oil consumption;
- problems when shifting gears (it is necessary to replace the flywheel).
Often a throttle adjustment is simply required. This will eliminate the difficulty of starting the engine. Often there are problems with the ignition, starter. If there are difficulties with starting the engine, then first of all check the ignition coil. With the disappearance of idling, the cause can be many factors, but most often it is the idle speed sensor.
It's not uncommon for a throttle position sensor to fail. The cost of replacing it is low - as well as the newest part. It will not be difficult to buy a repair kit for the 4g15 unit, all parts are available in the open sale. Often there are difficulties with an increase in fuel consumption - suspicion primarily falls on the lambda probe, since it is this sensor that is responsible for obtaining information about the residual amount of oxygen in the exhaust gases.
If the car simply does not start, you need to familiarize yourself with the error codes. It is often necessary to adjust the torque of the bolts on the cylinder head. Not often, but it happens that the valve cover gasket leaks - which causes oil to enter the candle wells. It is important to constantly check the engine for weak tightening of bolted joints - the elimination of backlash must occur in a timely manner.
Maintainability
The list of spare parts that may be needed for repairs is quite wide, but available - which is the reason for the high maintainability of cars equipped with 4g15 and analogues. The selection of parts is carried out exactly by the engine number. To pick up sensors, a distributor, a crankshaft or a high-pressure fuel pump, you will need to know one. Finding it is not so easy, it is located on the right side next to the pipe coming out of the radiator (the photo shows the place where the motor number is located):
Further, the search for spare parts can be carried out through the catalog, using the article. It is worth familiarizing yourself in advance with the location of the sensors, other parts that often fail (primarily the injection pump, pump, thermostat, distributor). The oil pressure sensor must be checked more often than others - since with an insufficient level of lubricants, scuffing on the surface of the pistons is possible. You need to know where the engine number is located - as it will be needed to register the car.
It is worth noting the main advantages of operating the 4g15 engine:
- valve clearances need to be adjusted relatively rarely;
- replacement of many parts does not require a visit to a car service, everything can be repaired in a garage (replace the ignition coil, exhaust manifold, oil pump);
- the repair process is quite simple from a technical point of view, therefore servicing a car, even with high mileage, will be relatively inexpensive (repair of hydraulic lifters, camshaft gears);
- the cost of spare parts is low - for example, buying valve stem seals or a pressure sensor in the intake manifold will cost several hundred rubles;
- DPTZ check can be carried out in any service, adjustment of the throttle position sensor can be performed in a garage;
- repair of the starter solenoid relay is rarely required - which simplifies troubleshooting when it is impossible to start the engine.
This is how the graph of dips on the bottoms on the 4g15 engine looks like:
If the car does not start, then the problem is probably in the ignition circuit (it may lie in the starter, the intake manifold may be clogged). Such a scheme is simple in the device, but you need to carefully review all the nodes to troubleshoot. If problems with starting occur in the case of sub-zero temperatures, then, most likely, the candles have been flooded. The use of the 4g15 engine at temperatures well below zero is problematic. You need to carefully monitor the voltage in the wiring - if necessary, remove the generator and replace it.
The main bearings are, in fact, bearings for the connecting rod (referred to as crankshaft bearings). They need to be carefully monitored for wear. Piston repair is often required due to poor quality oil. Floating revolutions can also be the result of poor-quality lubricant. In addition, there may be other reasons for this, for example, the use of a repair kit from an unknown manufacturer.
What oil to use in the engine?
The right choice of engine oil is the key to the absence of problems in operation. Lubricants affect many aspects of vehicle use. In recent years, according to consumer reviews, Liqui-Molly 5W30 Special AA oil has proven itself on the positive side. It is designed for American and Asian engines. Moreover, it allows solving an important problem of 4g15 operation - the difficulty of starting at a negative temperature.
According to reviews, launch even at -350 With is not difficult. Moreover, this oil can reduce the consumption of lubricants. During tests, the consumption per 10 km at positive temperatures was only 000 g. Which is an outstanding indicator, since according to the manufacturer's claims, the average oil consumption is 300 liter per 1 km.
The best solution is to use fully synthetic oil, the use of mineral compounds is contraindicated for these engines. The use of "native" synthetic oil from Mitsubishi has a positive effect on operation. Its cost is relatively low, while its tolerances completely coincide with the requirements of the engine - which has a positive effect on gasoline consumption and durability (300 thousand km are also “nurtured” on such engine oil).
Valvoline 5W40 is also used quite often in these engines. The advantage of this is just a reduced rate of oxidation. Even with intensive use of a car in the “city” mode, this oil can easily “care” for 10-12 thousand km and not lose its lubricating and cleaning properties. When choosing an oil, it is important to consider the temperature regime of using the car.
Today, 4g15 engines are quite rare, but deep modifications are installed in some models. The unit is distinguished by excellent maintainability and unpretentiousness.
