Hyundai/Kia Gdi Engine Failure

Michael Technical Support Specialist New York Posted   Edited  
Diagnostic Network
2011 Hyundai Sonata GL 2.4L (C) 6-spd (A6MF2)
Engine Failure

Since Hyundai Cars of North Americas inception, this manufacturer set out to offer a very strong vehicle. Starting from the bottom all the way to its first model premier (approx. 1992) Hyundai has been determined to offer a base line (cost) vehicle with top level options. This has been a proven formula for their continued success in the American market. Their lengthy warranty period (10 years/100,000 miles) has been a featured selling point.

However, with great success come some degree of failure,

Initially in the American market.

These engine issues were finally resolved when Hyundai changed their engine designs and resolved a tooling fault at the assembly level. It was discovered that a “brush hone” was leaving brush fiber deposits in the engine. These would later invade the oil galleys resulting in eventual oil starvation and internal catastrophic failure of the engine.

Later Hyundai changed their basic engine design to the gasoline direct injected (GDI) platform. Major engine failures are no longer an issue since 2014. However, like all direct injection engines, Hyundai’s GDI suffers from high carbon build up at the intake valves. The typical dealer repair recommendation has been to add techron (a fuel system cleaner poured into the fuel tank.