An initial inspection can reveal obvious damage, but cannot confirm suitability or remaining service life. This guide helps you prepare questions for the seller and a specialist; it does not replace professional diagnostics.
Start with the identification plate and reason for removal. Request photos of accessible housing areas, connections and blades. Visible damage calls for specialist assessment. There is no universal shaft-play rule: limits depend on the design and manufacturer data. Follow manufacturer instructions and inspect only with the engine stopped and cold.
Common questions
Do oil traces prove turbo failure?
Not on their own. Oil leakage may also involve other engine systems. Diagnose the cause before replacement.
