On the Mercedes-AMG M177 engine, failed oil separators can cause excessive crankcase pressure, leading to valve-cover leaks, front crank-seal leaks, and catastrophic rear-main-seal failure. When this happens, repairs can exceed 30 hours of labor and cost well over $10,000. In this video, Mike & Adam at 603 MTech Autowerks breaks down the real cause behind these failures and how to fix them the right way. We cover: • How faulty oil separators create crankcase pressure • Why that pressure forces s