Mitsubishi 4M4 engine
The Mitsubishi 4M4 engine is a range of four-cylinder diesel piston engines from Mitsubishi Motors, first introduced in the second generation of their Montero/Pajero/Shogun SUVs. They superseded the previous 4D5 engine family, main differences are enlarged displacements and the utilization of one or two over-head camshafts. Originally available only as a 2835 cc intercooled turbo, detail improvements in 1996 and a larger 3.2 litre option in 1999 served to improve power, torque, fuel economy and emissions. The final version has 3.0 litres swept volume and Common rail direct injection.
| Mitsubishi 4M4 engine | |
|---|---|
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Production | 06/1994- |
| Layout | |
| Configuration | Straight-4 |
| Displacement | 2.8–3.2 L (2,835–3,200 cc) |
| Cylinder bore | 95 mm (3.74 in) 98.5 mm (3.88 in) 95 mm (3.74 in) |
| Piston stroke | 100 mm (3.94 in) 105 mm (4.13 in) 105 mm (4.13 in) |
| Block material | Cast iron |
| Valvetrain | SOHC, DOHC 4 valves x cyl. |
| Compression ratio | 16.0:1-21.0:1 |
| Combustion | |
| Turbocharger | The 4M40 used the TD04 turbo from 1994 to 1997, it was replaced by the TF035 in 1998 and was used for 2 years. The 4M41 used the TF035 from 1999 to 2007 and was replaced later with the IHIRHV5. Only the IHIRHV5 turbo was a Variable Geometry type turbo on the 4M41. Both the 4M40T and 4M41 Were Intercooled . |
| Fuel system | Zexel Mechanical or Electronically controlled Distributor type injection pump Denso Common rail direct injection |
| Fuel type | Diesel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 59–147 kW (80–200 PS) |
| Torque output | 198–441 N⋅m (146–325 lb⋅ft) |
4M40
Inline 4-cylinder SOHC, bore x stroke = 95 mm × 100 mm (3.74 in × 3.94 in), 2,835 cc (173.0 cu in), swirl combustion chamber
Naturally aspirated
Compression ratio 21.0:1, Zexel Distributor type injection pump, 59 kW (80 PS) at 4000 rpm, 198 N⋅m (146 lbf⋅ft) at 2000 rpm
Applications:
- 1996-1999 Canter (lightest-duty), 69 kW (93 hp), 191 N⋅m (141 lb⋅ft) @ 2000 rpm
Intercooled Turbo Gen 1
Compression ratio 21.0:1, 92 kW (123 hp) at 4000 rpm, 294 N⋅m (217 lbf⋅ft) at 2000 rpm
Applications:
- 1993-1999 Pajero (MK II, MKII Blister Fender)
- 1996-2013 Mitsubishi Type 73 Light Truck
- 1998-2003 Triton/L200 Sport 4x4
- 1999-2009 Mitsubishi Colt LDV 4x4
Intercooled Turbo Gen 2
Compression ratio 21.0:1, Zexel Electronically controlled or Mechanical controlled distributor type Injection Pump, 103 kW (138 hp) at 4000 rpm, 314 N⋅m (232 lbf⋅ft) at 2000 rpm
Applications:
- 2003-2006 Triton/L200 Sport 4x4
- 1994-2006 L400 Delica
4M41
Inline 4-cylinder DOHC 16 valve, Bore x Stroke 98.5 mm × 105 mm (3.88 in × 4.13 in), 3,200 cc (200 cu in)
Intercooled turbo
Compression ratio 17.0:1, Zexel Electronic control type distributor type pump (direct injection inside diesel tube) or Denso Common Rail direct injection, 121 kW (162 hp) at 4000 rpm, 351 N⋅m (259 lbf⋅ft) at 2000-3000 rpm
Applications:
- 1999-2006 Pajero (MK III)
- 2005-2011 Triton/L200/Strada
- 2006- Pajero (Philippine Domestic Market)
- 2008-2011 Pajero Sport/Montero Sport
Variable geometry intercooled turbo
Compression ratio 17.0:1 or 16.0:1, Denso Common Rail Direct Injection
Applications:
4M42
Inline 4-cylinder DOHC 16 valve, Bore x Stroke 95 mm × 105 mm (3.74 in × 4.13 in), 2,977 cc (181.7 cu in), direct injection
OAT , Applications:
- 2001-2007 Mitsubishi Fuso Canter
CR , Applications:
- 2007-2010 Mitsubishi Fuso Canter, 92 kW
- 2007-2010 Mitsubishi Fuso Canter, 107 kW