By | September 29 2010 3:56 PM

Once an engine gets old it can fail for any number of reasons. Perhaps it suffered from too much heat exposure over time which caused the metal to expand and the engine to eventually fail. Maybe the cylinder heads cracked or warped or maybe an EGR valve caused detonation damage. Either way, once they come to the end of their life spans, unless you plan on buying new or used cars to replace them, failed engines must either be rebuilt or replaced by used engines.