Variator Pressure Accumulator – Maserati 4200 GranSport Quattroporte

This hydraulic pressure accumulator is a key component of the high-pressure variator system found in Maserati models such as the 4200, GranSport, and Quattroporte with the 4.2L dry sump V8 engine. It stores engine oil under pressure to ensure immediate and consistent supply to the camshaft variators, enabling precise valve timing control during cold starts and dynamic driving conditions. The accumulator contains a sealed nitrogen chamber that maintains pressure against the oil circuit. Over time, internal gas pressure can degrade, leading to delayed variator response. A common symptom of a failing accumulator is a rattling noise from the variators during engine start-up, especially after the vehicle has been parked for several hours or overnight. Replacing the accumulator can resolve these issues and restore proper variator function. We offer a brand-new aftermarket unit with identical dimensions and specifications to the original factory part.