Greetings to everyone,
I own a 2010 W204 250 CDI (OM651) equipped with a plastic oil sump. I recently had an oil leak from the sump gasket, therefore I attempted to tighten the sump nuts; however, I did not use a torque wrench, likely resulting in overtightening.
Following the tightening, the leak ceased; nevertheless, the engine now produces a pronounced knocking or ticking noise that accelerates with the rpm. The oil level is enough; nevertheless, I am concerned that I may have compressed the gasket, perhaps causing fragments to dislodge and obstruct the oil collection. Perhaps the sump is distorted or improperly positioned? Alternatively, it may be a coincidence that the engine failed simultaneously.
The garage I visited reported that a component had detached and penetrated the engine. The engine is likely irreparably damaged and requires replacement. I had only drove it a short distance, about two minutes to the garage.
It is necessary to elevate the engine in order to extract the sump, hence I am uncertain about the appropriate course of action. Ought I to relinquish my efforts? Alternatively, get a lift and attempt to replace the sump and gasket.