OM651 Timing Chain - Key Moments Only. • This video shows a short version of the repair, focused on the key moments and important nuances of timing chain replacement on the OM651 engine. You’ll see only the essentials: the workflow, repair logic, and the critical details that matter during this job. • We’re working on a Mercedes Sprinter 906 with a 2.1L OM651 diesel engine. In this repair, we perform a complete timing drive replacement, including the timing chain, chain guides, tensioner, and oi