How much does it cost to overhaul a Cessna 421C engine?
Engine overhauls can cost between $50,000 to $100,000 per engine, depending on the engine equipped on your aircraft. For example, a GTSIO-520 for a 421C will be closer to $100,000 per engine while a IO-520 for a 310 could be closer to $50,000 per engine. Cost-Effective: Rebuilding an engine is generally much cheaper than replacing it with a new or refurbished one. For many car owners, this is the primary reason for choosing a rebuild.