4G64 Engine Review: Everything You Need to Know


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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

  • city
  • highway
  • combined
 

  • 10.2
  • 7.6
  • 8.8
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


Dan Hoffman

Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime.

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