When someone is looking to buy an older car, they should expect it to have some mechanical problems. When they hear that the engine has been replaced or rebuilt, they shouldn't be surprised or alarmed. In fact, they should be happy. ... This could actually improve the value of the car rather than hurt it.

Is a rebuilt engine considered new?

Rebuilt Engines

A rebuilt engine is not a new engine, but when an engine is rebuilt properly it can significantly extend the lifespan of your vehicle. ... A re-manufactured engine has all new parts and has been completely overhauled to original factory or high performance specifications.

Is a rebuilt engine good or bad?

Rebuilt engines are not likely to work perfectly, but the owner bears the responsibility for the cost of the service and rebuild, even if the engine has problems later on. Even without mechanical issues, a rebuilt engine is expensive.