(TUR) MITSUBISHI 4M40T, 4M41T I4 SOHC / DOHC – INLET FITS MITSUBISHI PAJERO 1992-20084 DOOR 2.8/3.2 LITRE I4 8V PG426

Description

The (TUR) MITSUBISHI 4M40T, 4M41T I4 SOHC / DOHC, produced between 1992 and 2008. It was one of the most iconic SUVs of its era, combining rugged off-road capability with everyday practicality. Two key engines during this period were the 4M40T as well as 4M41T, both inline-four turbocharged diesel units. The 4M40T was a 2.8-litre SOHC (Single Overhead Camshaft) engine with 8 valves, while the 4M41T was a more advanced 3.2-litre DOHC (Double Overhead Camshaft) engine with 16 valves. These engines powered 4-door Pajero variants, delivering strong torque, reliability, and efficiency. A critical component of their operation was the inlet system, referenced under part code PG426. This ensured efficient airflow into the combustion chambers and supported turbocharged performance.

Engine Characteristics

• 4M40T I4 SOHC (2.8 Litre): Known for its simplicity and durability, this engine emphasized ease of maintenance while still delivering solid off-road performance.
• 4M41T I4 DOHC (3.2 Litre): A more modern evolution, offering improved airflow, combustion efficiency, and higher power output thanks to its DOHC 16-valve design.
• Turbocharging: Both engines utilized turbochargers to boost intake pressure, enhancing torque output and making the Pajero well-suited for towing, off-road driving, and long-distance touring.
• Reliability: Reinforced components and robust engineering made these engines capable of handling demanding conditions across diverse terrains.

Inlet System (PG426)

The inlet system, including the intake manifold and associated fittings. It played a vital role in ensuring the engine received a steady supply of clean, pressurized air. Its functions included:

• Air Distribution: Ensured even airflow across all cylinders, preventing imbalances that could affect performance.
• Turbo Integration: Worked in tandem with the turbocharger to deliver compressed air efficiently, maximizing combustion.
• Combustion Efficiency: By optimizing airflow, the PG426 inlet system supported better fuel atomization and reduced emissions.
• Durability: Designed to withstand the high pressures and temperatures associated with turbocharged diesel operation.

Vehicle Application

As an illustration, the (TUR) MITSUBISHI 4M40T, 4M41T I4 SOHC / DOHC was offered in 4-door configurations, appealing to families, adventurers, and professionals. The 4M40T and 4M41T engines, paired with the PG426 inlet system. It gave the Pajero dependable pulling power and consistent performance across diverse terrains. Its combination of practicality, toughness, and efficiency made it a popular choice worldwide.

Legacy

Between 1992 and 2008, the (TUR) MITSUBISHI 4M40T, 4M41T I4 SOHC / DOHC with the 4M40T and 4M41T engines cemented its reputation as a durable and capable SUV. The PG426 inlet system exemplified the importance of airflow management in turbocharged diesel engines, ensuring reliability and efficiency. Today, these engines remain respected among enthusiasts and mechanics, with the inlet system continuing to be a key focus in maintenance and performance tuning.