Always verify these numbers against your specific chassis manual variant, as updates occurred with the EVO engine. Fastener Component Torque Specification →right arrow →right arrow →right arrow Always use new stretch bolts Injector Hold-down Bolt 7 Nm + 90° + 90° Clean threads thoroughly before installing Main Crankshaft Pulley 200 Nm + 90° Requires a flywheel locking tool Camshaft Bearing Caps Follow the specific inside-out sequence Oil Pan Drain Plug Replace copper crush washer How to Effectively Use the Manual for Troubleshooting
What (e.g., W203 C-Class, W211 E-Class, Sprinter) you are working on. The exact repair job you are planning to perform next.
: Methods for measuring cylinder compression to evaluate engine health.
The Mercedes-Benz OM646 is a legendary 2.1-liter (2,148 cc) inline-four cylinder diesel engine. Produced between 2002 and 2010, it powered millions of vehicles, including the C-Class, E-Class, and the ubiquitous Sprinter van. Known for its cast-iron block and exceptional durability, it frequently achieves high mileage with proper care. Mercedes Workshop Manual Om646 Engine
Not all manuals are equal. Here is your hierarchy of quality:
: Inline 4-cylinder, DOHC 16-valve with turbocharging. 2. Core Maintenance & Procedures
Specifications for MB 229.31 or 229.51 oil grades. Always verify these numbers against your specific chassis
Unbolt the camshaft sprockets while holding the camshafts with a wrench.
Remove the intake manifold, exhaust manifold, and turbocharger assembly.
One dedicated OM646 service manual in PDF format contains and is a 110.7 Mb file. : Methods for measuring cylinder compression to evaluate
Any specific you are trying to troubleshoot.
A comprehensive OM646 workshop manual typically includes: