Engine Mitsubishi 4M40

Engine Mitsubishi 4M40 under the hood

The 4M40 engine is a diesel, in-line, 4-cylinder. Overhead camshaft. The 4M40 cylinder block is made of cast iron, the block head is made of aluminum alloy. It was offered in atmospheric and turbo versions, with a mechanical and electronic injection pump.

Mitsubishi 4M40 is better known as the engine for Pajero 2. It was first installed on this SUV in 1993. The diesel 4M40 was introduced to replace the old 4D56, which was still produced after that for some time. The engine has established itself as powerful and reliable, but time does not stand still – a new 4M41 with a displacement of 3.2 liters was already installed on the Pajero 3. This engine is the result of the 4M40’s identified and corrected weaknesses.

The engine was installed on:

  • Mitsubishi Delica 4 (PA4) in 1994 – 2006;
  • Mitsubishi L200 3 (K70) in 1996 – 2006;
  • Mitsubishi Pajero 2 (V30) in 1993 – 1999;
  • Mitsubishi Pajero 3 (V70) in 1999 – 2006;
  • Mitsubishi Pajero Sport 1 (K90) in 1996 – 2006;
  • Mitsubishi Space Gear 1 (PA) in 1994 – 2006.


Production years 1992-2003
Displacement, cc 2835
Fuel system vortex chamber
Power output, hp 80/4000 rpm (Non-Turbo)
125/4000 rpm (Non-intercooled Turbo)
140/4000 rpm (Intercooled Turbo)
Torque output, Nm 198/2000 rpm (Non-Turbo)
294/2000 rpm (Non-intercooled Turbo)
314/2000 rpm (Intercooled Turbo)
Cylinder block cast iron R4
Block head aluminum 8v
Cylinder bore, mm 95
Piston stroke, mm 100
Compression ratio 21
Features no
Hydraulic lifters no
Timing drive chain
Phase regulator no
Turbocharging no (Non-Turbo)
MHI TF035HM-12T (Non-intercooled Turbo)
MHI TF035HM-12T (Intercooled Turbo)
Recommended engine oil 5W-40
Engine oil capacity, liter 6.5
Fuel type diesel
Euro standards EURO 2 (Non-Turbo)
EURO 3 (Non-intercooled Turbo)
EURO 3/4 (Intercooled Turbo)
Fuel consumption, L/100 km (for Mitsubishi Pajero 1998)
— city
— highway
— combined
Engine lifespan, km ~400 000
Weight, kg 234

Frequent problems

Engine Mitsubishi 4M40The resource of the 4M40 turbine is in the region of 300 thousand km. About once a year, you need to clean the EGR valve, otherwise everything is clogged with carbon deposits, the car smokes and does not work as it should. With all the shortcomings, with regular maintenance and the use of good diesel fuel and oil, the motor is not bad and quite reliable, the resource can easily exceed 400 thousand km.

  • mechanical injection pump Bosch VE is quite capricious and regularly flows through the shaft seal;
  • in the electronic injection pump, the control lever position sensor or TPS is constantly buggy;
  • EGR valve and intake manifold flaps quickly become overgrown with soot and get stuck;
  • viscous fan clutch and heating control unit may fail up to 100,000 km;
  • at high mileage, the cylinder head often cracks, the timing chain is pulled out, the turbine is rented out.

6 thoughts on “Engine Mitsubishi 4M40”

  1. You need to sent the intercooler, turbo, manifold for servicing due to clogging. And plug the EGR and directed the egr using a hose to the rear. Good luck.

  2. Panashe Kabanzi

    Why does my 4m40 engine lacks power since the fuel pump was being removed for service and fitted back?

  3. Κυριάκος Αντωνίου

    Τι στροφόμετρο δεν δουλεύει .αλλαξα το εξάρτημα στο ταμπλό που είναι το στροφόμετρο αλλα πάλι δεν δουλεύει .το σενσορ prm που είναι

    What tachometer doesn’t work. I changed the part on the dashboard which is the tachometer but it still doesn’t work. the prm sensor which is

    1. Check that there is no leakage from the expansion tank. There are wires under it, there may be a short to ground.

    1. That Myint Tun

      4m4)0အင်ဂျင်အား pajeroကားအပြင် catterpiller 307/308 စက်များတွင်လည်းတပ်ဆက်ထားသည့်ကိုတွေ့ရပါသည် ထို့ စက်များမှာအလုပ်လုပ်ပုံမှာတူညီပါသ ား

      Google.Translate: The 4m4)0 engine is also installed in pajero cars as well as caterpillar 307/308 machines, so the machines work the same way.

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