4M40 Engine for sale

The Mitsubishi 4M40 is a 2.8-liter, inline-four, turbocharged diesel engine produced from 1993 to 2003. It served as the successor to the 4D56 in larger Mitsubishi SUVs and commercial vehicles, powering the Pajero (Montero), Delica, and L200 (Strada).

Specifications:

• Configuration: SOHC, 8-valve, inline-four

• Displacement: 2,835 cc

• Bore x Stroke: 95 mm × 100 mm

• Fuel System: Indirect injection with mechanical or electronic injection pump

• Aspiration: Turbocharged with intercooler

• Power Output: 125–140 hp (93–104 kW) at 4,000 rpm

• Torque: 285–300 Nm (210–221 lb-ft) at 2,000 rpm

• Compression Ratio: 21.0:1

• Key Features: Cast-iron block, aluminum cylinder head, timing belt

The 4M40 was developed to address the 4D56’s limitations, offering significantly more low-end torque and improved highway cruising capability. It features a larger turbocharger and intercooler for enhanced performance. Known for robust reliability, the 4M40 can achieve high mileage with proper maintenance. However, common issues include cylinder head cracking from overheating and injection pump wear. It was eventually replaced by the more advanced 4M41 common-rail diesel. Despite its age, the 4M40 remains popular in off-road and overland circles for its strong torque delivery, simplicity, and durability in demanding conditions.