Mitsubishi 4g54 engine
The once popular Mitsubishi Motors engine is 4g54. Configuration in-line, four-cylinder.
Belongs to the Astron series. It was used in the production of cars of popular models, for example, Pajero. Used in cars of other brands.
The engine has several versions. The US version is referred to as "Jet Valve". They are distinguished by the presence of a separate intake valve, which supplies an additional volume of air to the combustion chamber. This solution leans the mixture to reduce the level of exhaust emissions in certain operating modes.
Another version of the Mitsubishi engine is the ECI-Multi ("Astron II"). Appeared in 1987. The main feature is electronically controlled fuel injection. ECI-Multi was used to create the Mitsubishi Magna. The most popular version of 4g54 is carbureted. The production of engines with a two-chamber carburetor began in 1989. The carburetor has an auto-start device and a secondary chamber throttle pneumatic actuator. On some car models, an electronically controlled carburetor is found. In this case, the fuel system is supplemented by a diaphragm-type mechanical pump.
In a separate category, it is worth highlighting the turbocharged version of 4g54. A turbocharger with centralized fuel injection and intercooler was installed on the Mitsubishi Starion (GSR-VR). The turbocharged engine was equipped with an external electric fuel pump.
The most efficient turbocharger model TD06-19C was installed on the Pajero racing configuration. A racing car of this modification was not available to the average buyer and was used exclusively for sports races. Mitsubishi Starion took part in the Paris-Dakar race in 1988.
Specifications (according to Wikipedia, drom.ru)
| Volume | 2,6 l |
| Number of cylinders | 4 |
| Number of valves | 8 |
| Bore | 91,1 mm |
| Piston stroke | 98 mm |
| Power | 103-330 h.p. |
| Compression ratio | 8.8 |
Power depending on the version:
- Jet Valve - 114-131 hp
- ECI-Multi - 131-137 hp
- Carburetor version - 103 hp
- Turbo – 175 hp.
- Motorsport version - 330 hp
The engine number is located next to the exhaust manifold in a flat area.
Unit reliability
Mitsubishi 4g54 is a two-liter, reliable engine. Refers to the famous "millionaire" motors. It features a simple power system and good build quality.
Maintainability
Mitsubishi 4g54 is not the most common motor. Finding complete units and individual spare parts for it is somewhat difficult, but possible.
Complete engines, due to their rarity, are somewhat more expensive than their counterparts.
You can verify this on one of the sites with used goods. It is quite possible to order a contract engine from Japan, including from warehouses in Russia. By the way, this is much easier to do than to find individual parts, the cost of which often exceeds reasonable limits.
As in other cars, it is not uncommon for the starter to fail. Moreover, given the mileage, literally everything wears out inside the unit. The lamellas swell and melt, the anchor and brushes become unusable. An interesting fact is that an almost complete analogue, disassembled for spare parts, is a gear starter for the 402 KENO engine. A relatively inexpensive public unit is disassembled almost without problems. An exception is the removal of a new bearing to replace the old one. For this, the head is torn.
After that, the anchor is shortened by 2 mm. The shaft is drilled from the end by 1 mm or the ball is replaced with a size of 4,5 mm.
As a result, inexpensive parts from the donor "revive" the old starter, which once again indicates maintainability.
Often problems with the engine creates a chain. More precisely, its tension disappears or the timing phases go astray (less chain replacement is required). In this case, it is much more difficult to fix the breakdown and this is not surprising. The tensioner / damper is traditionally located in a hard-to-reach place. It is necessary to remove the grille, radiator, pump and chain covers, remove the chain of balancers. The balancing mechanism is bought without problems. For Mitsubishi engines, it is called "Silent Shaft". I am glad that there are inexpensive Russian and Ukrainian analogues of such mechanisms.
Installing a distributor in a 4g54 internal combustion engine for inexperienced motorists can be a lot of trouble, although it is no different from repairing other car brands. Errors are usually made that lead to incorrect ignition or uneven, incorrect operation of the engine. The main thing is to set the flag exactly in the middle when installing the distributor. The upper and lower marks on the distributor shaft must be set opposite each other, after which the distributor is placed in its place with marks on the crankshaft and cylinder head.
Since the engine has ceased to be produced for a long time, the clutch flywheel often fails in it. Such repairs are one of the most expensive.
Accompanied by the concomitant identification of other problems, such as the replacement of oil seals. Each gasket or gland is purchased with great difficulty. Their delivery to the place of repair has to wait weeks. Valve adjustment is among other problems of the already “not young” 4g54. Traditionally, in such cases it is easier to contact a specialized center.
In a special section of problems it is worth highlighting the repair of cracks. Overheating of the engine often entails repair of the cylinder head. Cracks in the head are indicated by white smoke from the exhaust pipe, which indicates that oil has entered the coolant. Also in such cases, bubbles (exhaust gases) are observed in the expansion tank or radiator. When parsing, oil and coolant leaks are usually detected. In such cases, a cylinder head gasket is required.
In general, reviews on Mitsubishi 4g54 are positive. Satisfied owners of the Mitsubishi Pajero 2.6 liter are especially common. The exceptional reliability of the motor, the availability of inexpensive analogues of spare parts are emphasized. Depending on the condition, the automatic transmission is repaired, bearings, gaskets and seals are replaced. There may be problems with the electrics, sensors and chain tensioner.
Choice of oil
In Mitsubishi with a 4g54 engine, it is recommended to fill in the original Lubrolene sm-x 5w30 oil, the name of which is often found in the manual. Oil numbers: MZ320153 (engine oil, 5w30, 1 liter), MZ320154 (engine oil, 5w30, 4 liters). Low-viscosity oil is excellent for the engine of this brand and model. Less often, users choose oil with a viscosity of 0w30. Oil numbers: MZ320153 (engine oil, 5w30, 1 liter),
MZ320154 (engine oil, 5w30, 4 liters).
Where was the engine installed?
80-90-s
| Volume | 2,6 l |
| Number of cylinders | 4 |
| Number of valves | 8 |
| Bore | 91,1 mm |
| Piston stroke | 98 mm |
| Power | 103-330 h.p. |
| Compression ratio | 8.8 |
70-80-s
| Dodge Ram 50 | with 1979-89 |
| Dodge Raider | with 1982-83 |
| Dodge 400 | with 1986-89 |
| Dodge Aries/Plymouth Reliant | with 1981-85 |
| Plymouth Voyager | with 1984-87 |
| Plymouth Caravel | 1985 |
| Plymouth Fire Arrow | with 1978-80 |
| Chrysler New Yorker | with 1983-85 |
| Chrysler Town and Country, LeBaron | with 1982-85 |
| Chrysler E-Class | with 1983-84 |
| Sigma | with 1980-87 |
| Debonair | with 1978-86 |
| Sapporo | with 1978-83 |
| Mazda B2600 | with 1987-89 |
| Magna | 1987 |
