Maserati GranTurismo / GranCabrio / Quattroporte Coolant Expansion Tank | 296547

Replace an aging, cracked or leaking Maserati coolant expansion reservoir with a vehicle-specific tank referenced by part number 296547. Designed for compatible Maserati GranTurismo, GranCabrio and Quattroporte applications, the reservoir provides the cooling system with the expansion volume it needs as coolant heats and cools while allowing convenient visual inspection of coolant level.

Construction & Function

The tank uses a molded translucent polymer body with formed chambers, mounting points and integrated hose connections. The semi-transparent material lets the coolant level be inspected without opening a hot pressurized system. Its molded shape is designed to package neatly in the original engine-bay location while connecting to the vehicle's cooling circuit through the corresponding ports and hose layout.

A healthy expansion tank is important because repeated heat cycles make old plastic reservoirs brittle over time. Hairline cracks around seams, hose necks or mounting areas can release coolant and allow the system level to fall. Replacing a deteriorated tank before a major leak develops helps protect cooling-system reliability.

Key Benefits

• Replacement reference 296547; also associated in parts catalogs as a successor to earlier reference 226973.
• Suitable for compatible Maserati GranTurismo, GranCabrio and Quattroporte cooling systems using this reservoir design.
• Translucent molded body supports quick coolant-level inspection.
• Integrated hose ports and mounting geometry simplify direct replacement of the corresponding original reservoir.
• Useful preventive replacement for reservoirs showing staining, cracking, seepage or brittle hose necks.

How to Replace the Coolant Expansion Tank

1. Work only on a completely cold engine. Hot coolant is pressurized and can cause serious burns if the cap or a hose is opened while hot.
2. Place the vehicle securely on level ground and remove any covers needed for access.
3. Drain or extract enough coolant to bring the level below the reservoir connections, following the vehicle service procedure.
4. Disconnect the reservoir hoses and electrical level-sensor connection if fitted. Cap or position hoses to minimize spillage.
5. Remove the reservoir fasteners and lift out the old tank. Compare hose ports, mounting points and part reference with the new unit.
6. Install the replacement reservoir, reconnect all hoses/sensors and secure the fasteners without stressing the plastic fittings.
7. Refill with the coolant type and mixture specified for the vehicle, bleed trapped air using the Maserati service procedure, then inspect carefully for leaks as the engine reaches operating temperature.

FAQ

What are common signs of a failing expansion tank?

Look for coolant odor, dried coolant residue, visible cracks, seepage around molded seams or hose necks, repeated low-coolant warnings, or unexplained coolant loss.

Can I open the tank while the engine is hot?

No. Never open a hot pressurized cooling system. Allow the engine and coolant to cool completely before service.

Does this part replace 296547?

This listing is built around Maserati reference 296547. Verify the original reservoir reference or VIN before ordering because model-year and market variations exist.

Should I reuse old coolant?

For a high-quality repair, use coolant that meets the vehicle manufacturer's specification and follow the correct fill and bleeding procedure. Contaminated or aged coolant should be replaced rather than reused.

What does the expansion tank actually do?

It provides space for coolant volume change as temperature rises and falls, supports the closed cooling circuit and gives a convenient point for level inspection and service.