Use a specialized liner puller plate to extract wet cylinder liners from the engine block. Inspect the cylinder block counterbores for erosion or cracking. 6. Lubrication and Cooling Systems Oil Circuit Flow
Multistage tightening usually ending with an angle-torque.
The Mercedes-Benz OM422 is a heavy-duty, 14.6-liter V8 diesel engine engineered for commercial vehicles, marine applications, and industrial equipment. Renowned for its reliability and robust power output, maintaining this engine requires strict adherence to factory specifications.
Inspect bearing clearances; check oil relief valve spring tension; change oil and analyze for fuel dilution.
Typically set to 15° to 18° Before Top Dead Center (BTDC), depending on the exact engine model suffix. om422 engine workshop manual
15W-40 for standard operations; 10W-40 for colder climates.
Clean/replace air filters; measure turbo boost pressure; remove injectors for pop-testing and spray pattern calibration.
The OM422 engine boasts several features that contribute to its exceptional performance and reliability:
. Because the OM422 lacks modern electronic fuel injection, it is highly prized by overlanders traveling to remote parts of the world. Field Repairable: Use a specialized liner puller plate to extract
Lock the pump shaft, slide it into the engine gear drive, and tighten the drive gear bolts. Fuel Injector Maintenance 200 bar + 8 bar (New springs).
High torque requirement to ensure vibration dampening. Why You Need the Official Manual
The OM422 is a 14.6-liter V8 engine known for delivering high torque at low revolutions. Specification V8 Engine, 4-stroke cycle Displacement 14,618 cc (14.6 Liters) Bore x Stroke 128 mm x 142 mm Compression Ratio 16.9:1 (Naturally Aspirated); 16.25:1 (Turbocharged) Oil Capacity 17.5 – 24 Liters Power Output 151 – 375 hp (depending on variant) Workshop Manual Contents
Mount the injection pump so that the markings on the pump drive gear align perfectly with the pump housing index mark. Lubrication and Cooling Systems Oil Circuit Flow Multistage
If you are working on a specific repair project, please let me know:
Note the orientation marks on the piston crown; pistons must face the correct direction relative to the front of the engine. 4. Fuel Injection System & Timing
The of your engine (truck, generator, marine vessel?)
