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Comprehensive replacement of the timing chain in the Mercedes OM 651 engine. The scope of work included: replacement of the timing (shaft gears, chain, slides, tensioner), replacement of the shaft seal on the gearbox side, replacement of injector washers, cleaning of the manifold and throttle valve from soot, replacement of the water pump, replacement of the coolant, replacement of the PK belt guide roller, cleaning of the engine compartment, draining and refilling of the air conditioning agent.