Om422 Engine Workshop Manual May 2026

The Mercedes-Benz OM422 engine is a legendary workhorse. As a member of the renowned OM420 series (often referred to as the "Compact" series), this V10 diesel engine powered some of the most iconic heavy-duty trucks and buses of the 1980s and 1990s, including the Mercedes 1935, 2035, and various O303 and O404 bus chassis.

For mechanics, restorers, and fleet managers, the OM422 Workshop Manual is not just a reference book; it is the definitive authority on keeping these iron giants on the road. om422 engine workshop manual

Below is a detailed breakdown of what the OM422 Workshop Manual entails, its critical sections, and why it remains an essential document for vintage Mercedes engineering. The Mercedes-Benz OM422 engine is a legendary workhorse

8. Special Tools Required

| Tool Number | Description | Use | | --- | --- | --- | | 601 589 01 33 00 | Valve spring compressor | Overhead valve disassembly | | 617 589 01 21 00 | Injection pump gear puller | Remove pump without timing disturbance | | 603 589 00 33 00 | Pre-chamber extractor | Threaded puller for pre-combustion chambers | | 614 589 00 10 00 | Dial gauge holder for cam lift | Measure cam lobe wear | including the Mercedes 1935

5. Service Procedures (Step-by-Step Highlights)

Option A: The Mercedes-Benz Classic Center (Most Reliable)

Mercedes has a "Classic" division that reprints manuals for vintage machinery. You can order a high-quality reprint of the OM422 manual from the German HQ. Expect to pay $150–$300 USD. This is the legal, perfect copy.