A-Premium Radiator Coolant Expansion Reservoir Overflow Tank with 20 PSI Cap — Direct-Fit for Buick/Chevrolet (White/Translucent)

The A-Premium Engine Radiator Coolant Expansion Reservoir Overflow Tank with cap is a direct-fit, pressurized replacement expansion tank designed for select Buick and Chevrolet models to restore proper cooling system operation.

This replacement expansion tank from A-Premium is molded from heat-resistant PA plastic and arrives complete with a spring-loaded, 20 PSI-rated cap. It's engineered to match OE mounting points and plumbing for easy installation on compatible Buick Cascada and Verano models and various Chevrolet Cruze and Orlando years. The tank helps the cooling system maintain proper pressure and provides a sealed location for coolant expansion and recovery during engine warm-up and cool-down cycles.

Which vehicles does this expansion tank fit?

This tank lists direct fitment for specific Buick and Chevrolet models and model years. Confirm compatibility by selecting your vehicle's Year/Make/Model before purchase or check the reference numbers against your OEM part.

• Buick Cascada 2016–2019 (1.6L L4)
• Buick Verano 2012–2017 (2.4L L4) and 2013–2016 (2.0L L4)
• Chevrolet Cruze 2011–2015 and Cruze Limited 2016
• Chevrolet Orlando 2012–2014
• Reference numbers: 603-383, 603 383, 13505353, 13393368, 13465094, 13256823, DAKG-15390, FRT1216C

How does this tank help the cooling system perform?

The expansion reservoir captures excess coolant when the engine heats, then returns coolant as the system cools, preserving system pressure and preventing air ingress. Using a pressurized, properly sealed tank with the correct cap rating helps the cooling circuit maintain consistent boiling point and flow characteristics.

• Pressurized design with included 20 PSI spring-loaded twist cap
• Reduces the chance of air pockets and localized overheating
• Molded from durable PA plastic to resist heat and vibration
• Maintains coolant volume and system pressure during thermal cycles

What are the installation and specification details?

The tank is made to align with the factory mounting holes and hose connections for a straightforward swap. It includes two mounting holes and arrives ready to install with the cap fitted; basic hand tools are typically all that’s needed for replacement.

• Mounting hole quantity: 2 for secure attachment
• Color: white/translucent for easy level checks
• Cap type: spring-loaded twist, cap included
• Cap maximum pressure rating: 20 PSI

What materials and durability can I expect?

A-Premium uses stabilized PA (polyamide) plastic formulated to tolerate high under-hood temperatures and vibrational stress. The construction targets long service life and resistance to cracking or deformation under normal operating conditions.

• High-temperature resistant PA plastic construction
• Engineered to withstand heat and road vibration
• Helps maintain heating system efficiency and component longevity
• Backed by a one-year unlimited-mileage guarantee from A-Premium

Who is this for? This A-Premium pressurized coolant expansion tank is intended for owners or technicians replacing a cracked, leaking, or otherwise failed reservoir on compatible Buick Cascada, Verano, Chevrolet Cruze, Cruze Limited, and Orlando vehicles. It suits DIYers who want a direct-fit, cap-included replacement and shops needing a durable aftermarket option. Always verify fitment by vehicle year/make/model or OEM reference numbers before ordering to ensure correct compatibility.