Vehicles using M138 engine list:

Engine M138 in the Maserati GranSport (2004–2007) is known for occasional issues with the timing chain tensioners, which can cause rattling noises and potential engine damage if ignored. Diagnosis involves listening for unusual engine noise at startup and checking for error codes related to timing components. Preventive maintenance includes regular oil changes with high-quality synthetic oil to ensure proper lubrication of tensioners and camshafts. Solutions often require replacing faulty tensioners and inspecting the timing chain for wear. Additionally, monitoring coolant levels and thermostat function helps prevent overheating, a common concern in high-performance engines like the M138.