2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:43
The main advantages of Japanese car engines, thanks to which they have gained popularity, are considered reliability and efficiency. However, many motor series of the late XX century. major automakers from Japan have become world famous for sporty modifications that remain relevant to this day. This article discusses the most famous Mitsubishi engine - 4G63, which became such thanks to a turbocharged modification that has achieved great success in motorsport.
General Features
This engine belongs to the 4G6/4D6 (originally Sirius) family of 4-cylinder inline engines.
The first Sirius engine, the G62B, was introduced in 1975. The larger displacement G63B with a different bore appeared soon after. In 1980, a 12-valve mono-injection turbo engine was introduced for the Lancer. In 1984, an 8-valve injection version appeared. G63B was used until 1986 - 1988. At this time (1986)the Sirius family was renamed 4G6, significantly modernized. At the same time, 8- and 12-valve SOCH variants were excluded, and 16-valve DOCHs were introduced instead.
In 1993, a modification appeared with a 7-bolt flywheel instead of a 6-bolt. Then they abandoned the 8-valve injection option. In 1995, another DOCH cylinder head was installed on the 7-bolt 4G63T. In 1997, the 6-bolt injector version of DOCH was dropped. A carbureted 8-valve engine was used on commercial models until 1998. In 2003, versions with MIVEC appeared. In 2005 Mitsubishi 4G63 replaced 4B11. However, to this day, this engine is produced by third-party companies under license.
Mitsubishi 4G63 2.0L has a bore of 8.5cm and a stroke of 8.8cm. The cast iron cylinder block is equipped with two balancer shafts. The motor is presented in versions with aluminum cylinder heads SOCH and DOCH, atmospheric and turbocharged, carburetor, two-carburetor, single-injection, injector. All cylinder heads are equipped with hydraulic lifters and do not require valve adjustment. Valve diameters are 33 and 29 mm for intake and exhaust, respectively. The timing is belt driven.
Atmospheric options
As noted above, the Mitsubishi 4G63 has been updated many times over the long history of Mitsubishi 4G63 production. Consequently, it has a large number of modifications with different cylinder heads, fuel systems, etc.
The following are the parameters of some of them:
- G63B is available in several performance options: 87 hp With. Withcarburetor, 93 liters. With. with single injection (both 8-valve SOCH), 103 liters. With. with 16 valves and injector.
- 4G631 is a 16-valve version of the SOCH with a 10:1 compression ratio. Develops 133 liters. With. and 176 Nm.
- 4G632 is slightly different from the first option. More powerful than it by 3 liters. s.
- 4G633 - 8-valve single-shaft modification with a compression ratio of 9:1. Its power is 109 liters. with., torque - 159 Nm.
- 4G635 - twin-shaft 16-valve engine with a compression ratio of 9.8:1 with a capacity of 144 hp. With. and 170 Nm.
- 4G636 is a 10:1 compression ratio variant of the same design. Features identical to 4G631.
- 4G637. It has a compression ratio of 10.5:1 and develops 135 hp. With. and 176 Nm.
Turbo
The first 4G63T was introduced in 1987. It was constantly updated during production. A total of three episodes were released:
1. 1G (1987 - 1996). In comparison with the atmospheric version, the crankshaft was replaced, piston oil nozzles were installed, instead of 240/210 cc nozzles, 390 (for variants with automatic transmission) and 450 cc were installed. For the turbocharged Mitsubishi 4G63 engine, a twin-shaft 16-valve cylinder head and TD05H turbines were used.
The first series is equipped with 252/252° camshafts and 9.5/9.5mm lift. The compression ratio is 7.8:1. The fifth Galant's turbocharged 4G63 was originally claimed to produce 197 hp. With. and 294 Nm. Later, the announced power value was lowered to 168 hp. s.
The feature of this engine is the presence of MCA-Jet technology,involving the use of a secondary intake valve to improve the efficiency of emission control. It allows switching between two and three valves per cylinder. This provides more power at high revs and responsiveness at low revs, combined with economy.
In 1989, power was increased to 220 hp. With. by flashing. In 1990, they carried out a significant modernization, replacing the crankshaft, connecting rods, pistons with lightweight ones, and the turbine on the TD05 16G for the version with manual transmission. Thanks to this, the compression ratio changed to 8.5: 1, the power increased to 240 hp. With. In 1994, two special modifications appeared. The first, designed for the Evo II, was boosted to 260 hp. With. and 309 Nm. The version for RVR, on the contrary, was slightly deformed to 220 - 230 hp. With. and 278 - 289 Nm, replacing the turbine with a small TD04HL. The most powerful modification 4G63T 1G was received by Evo III. Its performance was brought to 270 liters. With. and 309 Nm by increasing the compression ratio to 9:1, replacing the intake manifold and turbine with TD05 16G6.
2. 2G (1996 - 2001). The second series of turbocharged Mitsubishi 4G63 was oriented to be installed on the right side of the Evo IV engine compartment. These engines differ from 1G in light pistons, compression ratio 8.8:1, camshafts with a phase of 260/252 ° and a rise of 10/9.5 mm, reduced cylinder head channels, 450 cc injectors, intake manifold, reduced reservoir and throttle (up to 52mm), TD05HR twin-scroll turbine and increased boost pressure from 0.6 to 0.9 bar.
As a result of these improvements, performance has increased to 280 hp. With. and 353 Nm. The Evo V used modified camshafts, 560 cc injectors, slightly larger TD05HR twin-scroll turbos. As a result, the torque increased to 373 Nm. For Evo VI 1999 finalized cooling. The Evo 6, 5 (Tommi Makinen Edition) engine received lighter pistons, an enlarged intercooler, and a TD05RA turbine.
3. 3G (2001 - 2007). The 4G63T Evo VII features 260/252° camshafts with 10/10mm lift, intake manifold, oversized intercooler, oil cooler, TD05HR turbo (TD05 for GTA with automatic transmission and TD05HRA for RS). The Evo VIII engine received lightweight forged connecting rods, heavy aluminum pistons, a lightweight crankshaft, camshafts with a phase of 248/248 ° and a lift of 9.8/9.32 mm, different valve springs and a pump, improved turbine cooling.
Its capacity is 265 hp. With. and 355 Nm. The MR version engine was equipped with a thicker cylinder head gasket, even heavier pistons and a TD05HR turbine. It develops 280 hp. With. and 400 Nm. On the RS engine of the same performance, TD05HRA turbines were used.
In 2005 introduced the latest 4G63T for Evo 9 with MIVEC intake, different plugs, 256/248° camshafts with 10.05/9.32mm lift, TD05HRA turbo. It is identical in performance to the Evo VIII MR.
Due to the great motorsport success of both the engine itself and the Lancer Evo it powers, the 4G63T has become one of Mitsubishi's most famous sports engines and best known engine. In addition to Evolution I - IX, 4G63T was installed on Galant VR4 1988 - 1992,1G and 2G Eclipse for the US market, etc.
Application
For more than 20 years of production, Mitsubishi has equipped 15 models with the engine in question. So, the manufacturer installed atmospheric 4G63 on Mitsubishi Galant, Chariot/Space Wagon, Eclipse, RVR/Space Runner, Lancer, Outlander, etc.
An even larger number of third-party machines received a licensed 4G63. Among them are American (Dodge, Eagle, Plymouth), Korean (Hyundai), Malaysian (Proton), Chinese (Brilliance, Landwind Great Wall, Zotye, Beijing) models. On some of them, this engine is installed to this day.
Maintenance
The following problems are most typical for 4G63:
- Due to the wear of the engine mount (usually the left one), vibrations occur.
- Floating RPM indicates faulty injectors, temperature sensor or idle speed control or dirty throttle.
- If the balance shaft bearings are not sufficiently lubricated, they can jam and break the belt, which leads to a broken timing belt. This can be avoided by using quality oil and monitoring the condition of the belts, or by removing the balance shafts.
- The use of low-quality oil leads to rapid wear of hydraulic lifters, the resource of which is 50 thousand km.
4G63 is very reliable. Resource - 300-400 thousand km. Turbocharged versions usually last less due to operating conditions. It is recommended to change the oil at intervals of 7-10 thousand km, the timing belt - 90 thousand km.
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