When is engine crankshaft runout usually checked?

Engine crankshaft runout is typically checked during an engine overhaul. This procedure is essential because it involves a comprehensive inspection and maintenance of the engine components. During an overhaul, the entire engine is disassembled, allowing for precise measurements and assessments of key components, including the crankshaft.

Checking the crankshaft runout at this stage ensures that any deviations from the manufacturer's specifications are identified and corrected. Excessive runout can lead to vibrations, uneven wear, and potential failures in engine operation. This makes the overhaul phase the ideal time to address such critical measurements, ensuring optimal performance and longevity of the engine once it is reassembled.