This comprehensive service repair manual provides detailed instructions and guidance for repairing and maintaining the Mitsubishi 4D6 series engine. It includes step-by-step procedures, exploded diagrams, detailed illustrations, and photographs to help you understand and complete each repair process. The manual covers all aspects of the engine, including:

**Engine General Information:** This section provides crucial details like specifications and a comprehensive list of necessary special tools.

**Engine Components and Systems:** The manual delves into specific components and systems of the 4D6 series engine, offering detailed information on each. This includes:

* **Drive Belt and Timing Belt:** Learn how to inspect, adjust, and replace both the drive and timing belts for optimal engine performance.
* **Intake and Exhaust Manifolds:** Gain insights into the workings of the intake and exhaust manifolds, including disassembly, inspection, and reassembly procedures.
* **Turbocharger:** This section provides a thorough understanding of the turbocharger, covering its operation, maintenance, and troubleshooting.
* **Water Pump, Thermostat, Hose, and Pipe:** Learn about the cooling system, including the water pump, thermostat, hoses, and pipes, and how to diagnose and repair any issues.
* **Rocker Arm, Rocker Shaft, and Camshaft:** Discover the intricacies of the valve train, including the rocker arm, rocker shaft, and camshaft, with guidance on inspection and repair.
* **Cylinder Head, Valves, and Valve Spring:** The manual provides detailed instructions for examining, repairing, and replacing the cylinder head, valves, and valve springs.
* **Front Case, Silent Shaft, and Oil Pan:** This section dives into the engine's lower components, covering the front case, silent shaft, and oil pan.
* **Piston and Connecting Rod:** Acquire knowledge about the piston and connecting rod assembly, including disassembly, inspection, and reassembly procedures.
* **Crankshaft, Flywheel, and Drive Plate:** Learn about the crankshaft, flywheel, and drive plate, their functions, and how to perform maintenance or repairs.
* **Cylinder Block:** This section delves into the foundation of the engine, the cylinder block, covering inspection, repair, and replacement procedures.

**Engine 11A and 11B Sections:** The manual is specifically tailored for both the 11A and 11B variants of the 4D6 series engine, providing dedicated chapters for each. This ensures you have access to the most relevant information for your particular model.

This comprehensive manual empowers you to effectively repair and maintain your Mitsubishi 4D6 series engine, saving you time and money. You can confidently diagnose and address issues without needing to rely on specialized mechanics.

The Mitsubishi 4D6 series engine is a highly regarded and durable diesel engine that has been powering a wide range of Mitsubishi vehicles for over four decades. Introduced in the early 1970s, the 4D6 series has seen numerous iterations and refinements over the years, evolving from a humble 2.3-liter inline-four to a robust 2.8-liter and 3.2-liter powerhouse. The 4D6 engine family is known for its impressive reliability, fuel efficiency, and robust construction, making it a favorite among off-road enthusiasts and commercial vehicle operators. Its simplicity in design and durable components contributed to its widespread use in trucks, SUVs, and even some passenger cars. The engine is available in both naturally aspirated and turbocharged versions, offering a range of power output to suit various applications.

The Mitsubishi 4D6 series engine is renowned for its robust construction, featuring a cast iron block and head, which ensures high durability and longevity, even under demanding conditions. The engine's simple design, with its overhead valve configuration and robust internals, makes it relatively easy to maintain and repair. The 4D6 engine also boasts excellent fuel economy due to its efficient combustion process and optimized fuel delivery system. While the 4D6 series has been discontinued in newer Mitsubishi models, its legacy continues to be appreciated by enthusiasts and mechanics alike. The engine's longevity and availability of aftermarket parts ensure that it remains a viable option for rebuilding and modification. A comprehensive service repair manual for the 4D6 engine is a valuable tool for owners, mechanics, and enthusiasts, providing detailed information on maintenance and repair procedures, troubleshooting tips, and technical specifications.