In the process of buying a used car engine, it is the research that marks the difference between a safe and wise purchase. Try to know about the history of the engine, its mileage, and condition before sealing the deal. Always buy from well-reputed sources or at certified salvage yards to avoid scamsters or fraudulent activities. Ask about the warranty or return policy for your peace of mind. If you really want the assurance, personally inspect the engine or pay your trusted mechanic to do it for you. Compare pricing in order to land a good deal without compromising on quality. Following all these, you will save lots of money and avoid expensive repairs in the near future. Make that purchase with confidence and keep the used car engine working!