During a crankshaft inspection, which components should be checked?

• A. Vibration damper and engine mounts
• B. Oil filter and oil cooler
• C. Timing belt and tensioner
• D. Camshaft lobes and lifters

Answer: (B)

The key idea is that the crankshaft relies on proper lubrication and cooling to prevent wear and overheating. The oil filter and oil cooler are central to this. The oil filter removes particulates that could scratch bearing surfaces, and if it’s clogged, oil flow to the crankshaft area drops, raising the risk of bearing wear. The oil cooler maintains oil temperature; if it’s not working, oil can overheat and thin, reducing its lubricating film and increasing wear on the crankshaft and related bearings. So, checking the oil filter for restrictions and ensuring the oil cooler is delivering adequate flow and not leaking is essential during a crankshaft inspection. The other components listed relate more to vibration control, timing, or valve-train parts, not the crankshaft’s lubrication and cooling.