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Mitsubishi Motors Corporation (MMC) is a Japanese car manufacturer, which is a division of the Mitsubishi Group, the biggest group of Japanese multinational companies. Since 2016, MMC pertains to Nissan, which is a member of the Renault-Nissan-Mitsubishi Alliance.
Mitsubishi Motors is known for its compact power units, in-line three, 4-cylinder and V6 engines. However, 4-cylinder gasoline engines remain the most widespread among the company’s product range. For instance, the 4G63 4-cylinder gasoline power-unit is the brand’s bestseller. One of a kind, named Saturn, is widely used by the South Korean automotive brand Hyundai.
Now let’s talk about the 4G64. Having a capacity of 2,351 cc (2.4 L), the 4G64 is one of the biggest engines (to be exact, the second biggest) of the brand. Previously, the automotive manufacturer deals with the construction of 8-valve SOHC motors and after, it started to manufacture the 16-valve SOHC and DOHC ones. All these engines used a Multi-Point Fuel Injection system as well as had a bore and stroke of 86.5 mm × 100 mm (3.41 in × 3.94 in).
Afterward, Mitsubishi produced 4G64 gasoline motors with direct injection. The engine, which is utilized for the Mitsubishi L200 car, has an output of 140 hp (104 kW; 142 PS) at 5,250 rpm with 161 lb-ft (218 N-m) of torque at 4,000 rpm. While being applied for the Chrysler Sebring/Stratus, its output reaches 152 hp (113 kW; 154 PS) at 5,500 rpm with 162 lb-ft (220 N-m) of torque at 4,000 rpm.
The variant of the engine, which is used for Chrysler, has fracture-split connecting rods made of forged powder metal. Unlike interference motors DOHC and SOHC 16-valve 4G64, the SOHC 8-valve 4G64 is a non-interference one. The LPG variant of the engine, which reaches 115 hp (86 kW; 117 PS) at 5,000 rpm, has been successfully employed in the Mitsubishi Canter since 1996.
4G64 Specs
| Manufacturer | Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co Ltd Shiga Plant |
| Also called | Sirius |
| Production | 1983-nowadays |
| Type | In-line |
| Valve per cylinder | MIVEC intake |
| Oil pump type | Involute gear type |
| Cooling system | Water-cooled forced circulation |
| Water pump type | Centrifugal impeller type |
| EGR system | Single type |
| Injector type and number | Electromagnetic 4 |
| Injector identification mark | N275H |
| Throttle position sensor | Variable resistor type |
| Closed throttle position switch | Contact switch type, incorporated in idle speed control motor-TRUCK Movable contact type, incorporated in throttle position sensor – EXPO |
| Number of cylinders |
2 4 |
| Total displacement, cc | 2,351 |
| Cylinder bore mm | 86.5 |
| Piston stroke mm | 100 |
| Compression ratio | 8.5 9 9.5 11.5 |
| Power output h.p at rpm | 112/5000 124/5000 132/5250 150/5000 150/5500 |
| Torque output, Nm/rpm | 184/3500 189/3500 192/4000 214/4000 225/3500 |
Fuel consumption, for Eclipse III
|
|
| Oil consumption, L/1000 km (qt. per miles) |
up to 1.0 (1 qt. per 750 miles) |
| Recommended engine oil | 0W-40 5W-30 5W-40 5W-50 10W-30 10W-40 10W-50 10W-60 15W-50 |
| Engine oil capacity, L | 4.0 |
| Oil change interval, km (miles) | 7,000-10,000 (4,500-6,000) |
| Engine lifespan, km (miles) -Official information -Real |
– 400,000+ (245,000+) |
| Tuning, HP -Max HP -No life span loss |
1000+ – |
Valve timing
| Intake valve Open BTDC | 20” 19” |
| Intake valve Close ABDC | 64” 57” |
| Exhaust valve Open BBDC | 64” 57” |
| Exhaust valve Close ATDC | 20” 19” |
Torque specifications
| Nm | ft.1b.s. | |
| Cooling fan bolt | 11 | 8 |
| Water pump pulley bolt – Engine without cooling fan | 9 | 7 |
| Water pulley bolt pump – Engine with cooling fan | 11 | 8 |
| Generator brace bolt | 14 | 10 |
| Generator mounting bolt | 24 | 17 |
| Generator pivot nut | 23 | 17 |
| Crankshaft pulley bolt | 25 | 18 |
| Spark plug | 25 | 18 |
| Distributor nut | 11 | 8 |
| Ignition coil bolt | 14 | 10 |
| Ignition power transistor nut | 18 | 13 |
| Tensioner bolt | 49 | 35 |
| Tensioner spacer | 49 | 35 |
| Oil pumps sprocket nut | 55 | 40 |
| Crankshaft sprocket bolt | 120 | 87 |
| Tensioner “B” bolt | 19 | 14 |
| Silent shaft sprocket bolt, right | 46 | 33 |
| Engine supports bracket bolt, left | 36 | 26 |
| Camshaft sprocket bolt | 90 | 65 |
| Throttle body bolt – SOHC | 12 | 9 |
| Fuel rail bolt | 12 | 9 |
| Fuel pressure regulator bolt | 9 | 7 |
| Throttle position sensor bolt | 2 | 1.4 |
| Idle speed control motor bolt | 3.5 | 2.5 |
| Idle air control motor bolt | 3.5 | 2.5 |
| Turbocharger waste gate actuator bolt | 12 | 9 |
| Bearing cap bolt M8x25 M8x65 |
24 20 |
17 14 |
| Cylinder head bolt | 95 | 69 |
| Oil bolt | 7 | 5 |
| Oil filter bracket bolt | 19 | 14 |
What cars have the 4G64?
- 1993-1997 Mitsubishi Chariot
- 1988–2006 Mitsubishi Delica/Van
- 1997-1999 Mitsubishi Eclipse GS Spyder Convertible FWD model equipped with a 141 hp (105 kW) 2.4 L 16-valve SOHC
- 2000-2005 Mitsubishi Eclipse
- 1994–2003 Mitsubishi Galant
- 1990–present Mitsubishi L200
- 1996–1998 Mitsubishi Magna (codenamed 4G64-S4 and fitted to the TE-TF series)
- 1990–1996 Mitsubishi Mighty Max
- 1998-2005 Mitsubishi Montero (V11 – 2 door) Latin America version
- 2001 Mitsubishi Airtrek
- 2003 Mitsubishi Outlander
- 1987–1990 Mitsubishi Sapporo
- 1986-2005 Mitsubishi Triton
- 2005 Mitsubishi Zinger
- 2003-2006 Kia Sorento 2.4i Manual
- 2004–present Brilliance BS6
- 2008–present Chery V5
- 1983–1992 Dodge Colt Vista (AWD only)
- 1990–1992 Dodge Ram 50
- 2006–present Great Wall Hover(X240 and V240)
- 1986-1998 Hyundai Grandeur
- 1989–1991 Hyundai Sonata
- 1999–2005 Hyundai Sonata
- 2001 Hyundai Santa Fe
- 2000–2005 Kia Optima
- 1998-2003 Mitsubishi Space Wagon
Sealant
| Specified sealant | Quantity | |
| Rocker cover | 3M ATD Part No. 8660 or equivalent | As required |
| Semi-circular packing | 3M ATD Part No. 8660 or equivalent | As required |
| Oil pan gasket | MITSUBISHI GENUINE PART MD970389 or equivalent | As required |
| Engine coolant temperature gauge unit | 3M ATD Part No. 8660 or equivalent | As required |
| Engine coolant temperature sensor | 3M Nut Locking Part No. 4171 or equivalent | As required |
| Oil pressure switch | 3M ATD Part No. 8660 or equivalent | As required |
| Oil pressure gauge unit | 3M ATD Part No. 8660 or equivalent | As required |
Mitsubishi 4G64 engine problems and reliability
The 4G64 motor is a copy of 4G63, but with bigger displacement. So, all the problems are identical.
4G64 tuning
DOHC + camshafts
To increase the capacity of the 4G64 without a turbine we need to remove the single-shaft cylinder head and buy a new head from the Hyundai Sonata 4 generation (G4JS motor) together with the intake manifold, modify it, remove the rough edges, align the channels.
In addition, we need to acquire the throttle from the Evo, the cold inlet, ARP studs, forged pistons for increased compression ratio (~ 11-11.5, for example Wiseco), the Eagle connecting rods, remove the balance shafts, camshafts to buy 272/272 with the split gear and reinforced springs, fuel rail from the Galant, nozzle with capacity of 440-450 cc, Walbro 255 pump, exhaust manifold 4-2-1 (4-1 possible), exhaust 2.5 “pipe, other extra small things and flashing. With all these components 4G64 engine power will rise up to 200+ hp.
4G64 Turbo (4G64T)
For further increase of the HP you need to inflate the engine. The easiest way is to buy a cylinder head from the Lancer Evolution, with all attachments, turbine, intercooler, fan, collector, exhaust, which should be finalized by the right vehicle. In addition, improvements will require the establishment of the oil channels for the turbine, also you will need an ARP studs, turbo camshafts 272 with the split gear and reinforced valve springs, forged piston (compression ratio ~ 8.5-9), the Eagle connecting rods, you need to remove the balance shafts, buy jets from Evo 560 cc or more productive, Walbro pump 255. After setting you’ll get 400+ hp.
For increasing torsionity of the 4G64, it is necessary to replace the crankshaft by 88 mm from the Evo or the lightweight, 156 mm rods (titanium for high-power) and to chisel cylinders up to 87 mm, in the amount of 2.1 it will give you a very high revving engine. You can put a Garrett GT42 with all the attendant things and go quietly well … on a straight line of course.
Mitsubishi 4G64 engine for sale
