Mitsubishi 4b12 engine
Content
The in-line four-cylinder ICE 4b12 with a volume of 2.4 liters was developed jointly by Mitsubishi and Kia-Hyundai. This engine has another designation - g4ke. Installed in Mitsubishi Outlander cars, as well as many other cars. Possesses excellent operational characteristics.
Description of the engine, its main features
The unit from the manufacturer Mitsubishi is marked as 4b12. You can often find the designation g4ke - these two different motors are almost identical in their characteristics and are interchangeable. Therefore, it is possible to replace g4ke with 4b12. But it is important to remember the features of the 4b12 swap. Both units belong to the Theta II family.
This Mitsubishi series also includes 4b1. The 4b12 motor in question is the direct successor to the 4G69 engine. Therefore, he inherited many of its features, including some important disadvantages. Also, these motors are used in Chrysler World cars. In fact, the 4b12 motor in question is an enlarged version of the g4kd / 4b11std models.
The increase in the motor itself is due to the larger size of the crankshaft - the piston stroke in such will be 97 mm instead of 86 on the smaller version. The working volume of which is 2 liters. The main similarities of the 4b12 engine design with the smaller g4kd models and analogues:
- a similar system for changing the valve timing - on both shafts;
- the absence of hydraulic lifters (which somewhat simplifies the overhaul of the motor - if the need arises).
Despite certain disadvantages of the engine, it has many advantages. The oil level must be closely monitored. Since 4b12 is distinguished by some "voracity". The manufacturer recommends replacing every 15 thousand km, but the best solution would be a change every 10 thousand km - this will delay the need for major repairs for the maximum period.
The 4b12 and g4ke engines are exact copies of each other. Since those were developed under the special program "World Engine". These motors were mounted:
- Outlander;
- Peugeot 4007;
- Citroen C crosser.
4b12 engine specifications
Separately, it should be noted the timing device - it is supplied not with a belt, but with a chain. This significantly increases the resource of the mechanism itself. The timing chain should be changed every 150 thousand km. It is important to accurately set the tightening torque. Thanks to the technical characteristics, many motorists are ready to turn a blind eye to a number of disadvantages of the 4b12 engine - it “eats” oil, there is a certain vibration during operation (and this often manifests itself spontaneously).
The resource declared by the manufacturer is 250 thousand km. But in practice, such motors take care of an order of magnitude more - 300 thousand km and more. What makes the purchase and installation of a contract engine a profitable solution. The following factors affect the resource of a particular motor:
- how often candles, oil filters and the oil itself are changed;
- the quality of the fuel used;
- mode of operation - it is necessary to carry out repairs in a timely manner if necessary, adjust the valves;
- warming up before starting the engine - this is especially important when working in the winter.
Before purchasing a car with a 4b12 engine, it is necessary to carry out diagnostics. The main technical characteristics of the motor:
| Characterization | Value |
|---|---|
| Manufacturer | Hyundai Motor Manufacturing Alabama / Mitsubishi Shiga plant |
| Brand, engine designation | G4KE / 4B12 |
| Years of manufacture of the motor | From 2005 to the present |
| Cylinder block material | Aluminum |
| Fuel feeder | Injector |
| Motor type | Inline |
| Number of cylinders, pcs. | 4 |
| Number of valves per 1 cylinder | 4 |
| The piston stroke, mm | 97 mm |
| Cylinder diameter, mm | 88 |
| Compression ratio | 10.05.2018 |
| Engine displacement, cubic meters cm | 2359 |
| Engine power, hp / rpm | 176 / 6 000 |
| Torque N×m/rpm | 228 / 4 000 |
| Fuel | 95th |
| Environmental Compliance | Euro 4 |
| Engine weight | ND |
| Fuel consumption per 100 km. way | vegetable garden - 11.4 l track - 7.1 l mixed - 8.7 l |
| What type of oil is recommended | 5W-30 |
| Oil volume, l. | 04.06.2018 |
| Oil change how often | Every 15 thousand km (recommended by service centers every 7.5-10 thousand km) |
| Valve clearances | Graduation - 0.26-0.33 (standard - 0.30) Inlet - 0.17-0.23 (default - 0.20) |
Motor reliability
Feedback on the operation of the engine is generally positive. But there are a number of disadvantages, features of the engine - which must be taken into account during operation. This will increase the life of the motor, as well as avoid problems on the road. If you foresee all possible malfunctions in advance. This is especially true for 4b12 engines installed on Mitsubishi Lancer 10 cars.
The most common malfunctions of the following kind:
- failure of the oil pump - it is important to monitor the oil pressure, if there are suspicions of problems, it is necessary to turn off the engine;
- air conditioning compressor bearings - it is important to periodically replace;
- chirping of nozzles - it is required to adjust the operation of the injector;
- increased vibration - usually associated with the need to replace the candles.
It is important to pay attention to the cylinder block. The crankshaft usually does not require replacement, but it is necessary to monitor the condition of the connecting rod bearings.
Breakdowns that require the removal of the engine to fix them occur relatively infrequently. It is important to monitor the condition of the alternator belt and replace it in a timely manner. This process is not complicated, it is possible to carry it out in a garage - like many other repairs.
Some difficulties sometimes arise when removing the cylinder head - the cylinder head. Such procedures, in the absence of experience and appropriate tools, are best carried out in a specialized service. When carrying out repair work, it is advisable to purchase only original parts. The drive belt is from Bosch, the liners are from Taiho, other well-known companies. This will minimize the likelihood of purchasing defective products, leading to engine failure in the future.
Buying a belt, as well as oil and other consumables, will not be expensive. But components such as the crankshaft sensor, camshaft and egr valve will cost several thousand rubles or more. 4b12 is equipped with a reliable CVT on some car models, there are also many trim levels with a manual gearbox. When repairing, it is important to accurately measure the size of the crankshaft - this will simplify the selection of parts.
Maintainability, service life of the gas distribution mechanism
It is important to carry out a timing audit in a timely manner. Otherwise, if the components of this mechanism break down, it may be necessary to repair the entire engine. It is worth noting that disassembling the engine for timing repair is simple, but requires skills and special tools. Otherwise, important structural details may be damaged. For example, the timing belt tensioner. Disassembled during repair 4b12 looks like this:
This engine starts to consume more oil than the limit set at the factory by the automaker. But at the same time, only at the mileage mark of 180 thousand km. After disassembly, it will be necessary to wash all parts covered with mining, soot. Deca or Dimer are used for this.
Most often, the following difficulties arise during the repair:
- dismantling of connecting rods and pistons;
- remove the engine bottom plate.
For these operations, you will need a specialized tool. The resource of the timing chain is 200 thousand km. But this indicator is significantly affected by the quality of the oil used. It is important to periodically check the chain stretch, its length will increase. When replacing, it must be remembered that there are two different samples of this part - chains of the old and new types. They are interchangeable.
The main signs that the timing chain needs to be replaced:
- there are "blinking" sounds on the "cold";
- there is a loss of power;
- chain slack - it can be seen when the cover is removed.
As in other cars, it is important for engines of this type to mount the chain according to special marks in the timing. Otherwise, the engine will not start or will run intermittently.
It is important to remember: a new timing chain may simply not have painted links to simplify installation.
Therefore, before removing the old one, you need to designate such marks yourself. The marks on the camshaft sprockets are marked with special marks in the picture:
What oil to use for a 4b12 engine
The choice of oil for this motor is a serious issue. The service life of the timing, as well as other important mechanisms and engine systems, depends on the quality of the lubricant. According to the manufacturer's recommendation, it is necessary to use oils with a viscosity of 0W-20 to 10W-30, depending on climatic conditions and operating conditions.
There is a specification regarding the 4b12 engine:
- API SN, SM;
- ILSAC GF-5;
- ACEA A1 / A5 - it is possible to use oil without this specification, since this designation is European.
The optimal solution when choosing oil for cars with a 4b12 engine in the case of operation in the Russian Federation is Moby 1 X1 5W-30. But it is important to familiarize yourself with the signs of fake oils in advance. The use of counterfeit goods may cause damage. For example, with an increased viscosity of the oil at sub-zero temperatures, it may be squeezed out through the crankshaft oil seal, other damage will result in the need for a major overhaul.
Swap 4b12 for other cars
The 4b12 engine has standard dimensions and can be replaced by another engine similar in its overall and other parameters. Similar replacements take place, for example, in Mitsubishi lancer GTs 4WD cars. In such models, a 4b11 to 4b12 engine swap is carried out. The volume of the first will be 2 liters, the second - 2.4 liters. The process is quite simple:
- dismantling the old engine from the body;
- installation of attachments, intake and wiring on a new motor;
- installation of a new engine with all equipment in the car body on the seat.
The best solution is to exchange motors in special services. The process in those is adjusted, there is no need to remove the entire equipment. Moreover, there is no need to dismantle the box during the swap. It is enough to move a part of the detached attachment to the side.
The consequences of such a reinstallation:
- the car becomes more dynamic;
- 4b11 keeps low revs better.
Chip tuning
Chip tuning - firmware of the engine control unit. By changing the ECU software, it is possible to obtain the following advantages:
- the engine can run on fuel with an octane rating of 85 to 100;
- torque increase by 10%;
- increasing engine power without physical modifications.
It is not required to open the engine, to carry out any mechanical modifications. This tuning from the official manufacturer will cost about $ 600. And the guarantee will be preserved. According to the measurements of the program, depending on the firmware, the power increase can be up to 20 hp. Measurements before and after tuning are shown in the graph below:
List of cars on which this engine was installed
The 4b12 engine was installed on many car models - due to its versatility and practicality:
- Mitsubishi Delica D:5 (01.2007 — n.v.);
- Mitsubishi Outlander 24G DBA-CW5W - moreover, such an engine is still installed in the second restyling model, suv, 3rd generation;
- Citroen C-Crosser4;
- Peugeot 4007.
The 4b12 engine is a reliable engine that requires minimal attention from the owner in the first 200 thousand km. Therefore, it is still installed in some car models. Maintainable, unpretentious to the quality of fuel and oil.
