Mercedes Workshop Manual Om646 Engine ((better)) Jun 2026

| Tool Number | Name | Purpose | |-------------|------|---------| | 601 589 02 21 00 | Camshaft locking plate | Timing chain replacement | | 601 589 00 40 00 | Crankshaft TDC pin | Locate TDC | | 611 589 00 63 00 | Injector puller | Remove seized injectors | | 601 589 03 63 00 | Valve spring compressor | Head reconditioning | | 601 589 00 90 00 | Harmonic balancer holder | Crank bolt removal |

Reinstall the drain plug with a new crush washer. Torque to 30 Nm. Mercedes Workshop Manual Om646 Engine

However, even a "bulletproof" engine needs the right care. Whether you’re a DIY mechanic or just a dedicated owner, a is your best friend. Here’s what you need to know about maintaining and repairing this diesel legend. 1. Why the OM646 is a Fan Favorite | Tool Number | Name | Purpose |

Common Rail Direct Injection (CRDI) – Delphi or Bosch depending on generation Bore x Stroke: 88 mm × 88.3 mm Compression Ratio: 18.0:1 (Standard) / 17.5:1 (EVO) Essential Sections of the Workshop Manual Whether you’re a DIY mechanic or just a

Cycle the ignition to position II several times to prime the system before cranking. 4. Step-by-Step Repair Guides Valve Timing & Timing Chain Replacement

Before diving into the manual's procedures, it helps to understand the core specifications of the engine family. The OM646 came in two primary variants: the standard OM646 and the updated OM646 EVO (introduced in 2006 with over 90 modified components).

Both factory and aftermarket manuals are commonly available in digital PDF format. A PDF manual offers significant advantages: