Aluminum Coolant Overflow Expansion Tank for Nissan GT-R (2009-2021) 3.8L

Heavy-Duty Aluminum Coolant Overflow Expansion Tank for 2009-2021 Nissan GT-R (R35)

What it Does: The Aluminum Coolant Overflow Expansion Tank replaces the failure-prone factory plastic reservoir on the 2009-2021 Nissan GT-R to prevent pressurized coolant loss, seam splitting, and elevated operating temperatures under boost.

The Stock Nissan GT-R Cooling Reservoir Degradation

The twin-turbocharged VR38DETT under the hood of the R35 GT-R generates excessive engine-bay thermal loads. The OEM blow-molded plastic expansion tank sits directly exposed to severe heat cycling and mechanical vibration. Over time, continuous exposure to pressurized, boiling coolant causes the factory resin to outgas, turn brittle, and micro-fracture along its molded sonic-welded seams. Under track conditions or higher boost pressures, the weakened plastic balloons, leaks pressure, and suffers catastrophic failure at the hose bungs, risking sudden coolant evacuation, engine overheat, and severe warpage of aluminum engine components.

The Engineering Solution

Fabricated from aircraft-grade aluminum sheet, this replacement coolant tank eliminates plastic fatigue entirely. Each joint is precision TIG-welded to create unified, high-integrity seams capable of sustaining cooling-system expansion pressures well beyond factory thresholds without weeping or distortion. Direct CNC-matched mounting brackets and pre-positioned barb fittings match the factory footprint precisely for a direct bolt-in conversion. The kit includes a high-pressure radiator-style cap, completely eliminating the failure risk of OEM part 21710-JF00A while stabilizing the closed-loop cooling system on high-output and track-driven builds.

Technical Specifications

Compatibility

• 2009-2021 Nissan GT-R Premium 3.8L V6
• 2012-2021 Nissan GT-R Black Edition 3.8L V6
• 2014-2021 Nissan GT-R Track Edition 3.8L V6
• 2015-2021 Nissan GT-R NISMO 3.8L V6
• 2020-2021 Nissan GT-R 50th Anniversary Edition 3.8L V6

Frequently Asked Questions

Does this fit the R35 GT-R?

Yes, this is a direct fit for the 2009-2021 Nissan GT-R equipped with the VR38DETT engine.

Do I need to modify factory hoses or brackets to install this tank?

No, the reservoir utilizes factory mounting points, accepts OEM routing hoses, and installs with standard hand tools without cutting or drilling.

The Nissan High-Performance Caliber

Engineered to withstand the demanding thermal dynamics and extreme G-forces of the twin-turbo platform, this all-aluminum expansion tank provides bulletproof cooling reliability so you can deploy maximum boost without risking blown plastic seams on street or circuit.