Mechanical Problems Mechanical Problems Mechanical Problems Usually Start Off Small And End Up Big. A visual inspection of the engine is the first step in proper diagnostics. Recognize that the working engine is composed of a series of mechanical events that are interrelated. STOP / LOOK / LISTEN – Is something to keep in mind. Search Our Site or Choose Your Topic Below ! How to find mechanical engine misfires Valve guide wear-What to fix and why? Stay tuned for more updates on: Mechanical Problems.