The 4M40 is an in-line, four-cylinder diesel engine. camshaft above. Cast iron makes up the 4M40 cylinder block, while aluminum alloy makes up the block head. It came with a mechanical and electronic injection pump and was available in atmospheric and turbo versions.
The Pajero 2’s Mitsubishi 4M40 engine is more well-known. This SUV had it installed for the first time in 1993. The old 4D56 was replaced by the diesel 4M40, which continued to be produced for a while. Although the engine has proven to be strong and dependable, time is not standing still; the Pajero 3 already has a new 4M41 with a 3.2-liter displacement. This engine is the outcome of the 4M40’s flaws being found and fixed.
The engine was mounted 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.
Specifications
| 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 |
15.5 10.7 12.5 |
| Engine lifespan, km | ~400 000 |
| Weight, kg | 234 |
Frequent problems
The 4M40 turbine has a resource of about 300,000 kilometers. The EGR valve needs to be cleaned about once a year; otherwise, carbon deposits clog everything, causing the car to smoke and malfunction. Despite all of its flaws, the motor is still quite dependable and can easily surpass 400,000 kilometers with routine maintenance and the use of high-quality diesel fuel and oil.
injection pump that is mechanical Bosch VE is highly erratic and frequently passes through the shaft seal; the electronic injection pump’s control lever position sensor, or TPS, is frequently malfunctioning; the EGR valve and intake manifold flaps rapidly accumulate soot and become stuck; the viscous fan clutch and heating control unit may fail up to 100,000 kilometers; at high mileage, the cylinder head frequently cracks, the timing chain is pulled out, and the turbine is rented out.