Calorstat RC0027 Radiator Cap - Intercooler

Radiator Cap for OEM-Style Cooling Control

The Calorstat RC0027 is a standard radiator cap built with stainless steel and rubber for a secure seal and consistent cooling-system pressure control. With a 1.1 inside diameter and 16 psi maximum pressure rating, it is a direct-fit option for many Hyundai, Kia, Mazda, Mitsubishi, Subaru, Nissan, Honda, and Toyota applications.

Key Features

• Part number: RC0027
• Material: stainless steel and rubber
• Color and finish: silver
• Type: standard radiator cap
• Attachment type: cam on
• Round shape with OEM performance grade
• Filler neck inside diameter: 1.1
• Maximum pressure: 16 psi
• Height: 0.94

Detailed Description

Calorstat RC0027 is an OEM-performance radiator cap engineered for vehicles that require a 1.1 bar / 16 psi pressure rating. The stainless steel and rubber construction supports a dependable seal at the radiator filler neck, while the cam-on attachment style and round profile match common OE cooling-system designs. This radiator cap is listed for a wide range of applications, including Hyundai Elantra, Kia Forte, Mazda CX-5, Subaru Forester, and Mitsubishi Outlander Sport, along with many other fitments across the 1995-2025 model years. This part cross-references Gates 31336 for the same application.

What It Is Used For

• Maintaining radiator system pressure at the specified 16 psi rating
• Sealing the filler neck to reduce coolant loss from pressure escape
• Supporting stable coolant circulation in daily-driven vehicles
• Replacing a worn, weak, or damaged radiator cap
• Restoring proper cap fit on OE-style cooling systems

Installation Notes and Tips

Verify the filler neck inside diameter is 1.1 before installation. Confirm the vehicle’s required pressure rating matches 1.1 bar / 16 psi, especially on applications noted as OEM recommended or pressure-rated in the fitment data. Inspect the radiator neck and sealing surfaces for corrosion, cracks, or debris before installing RC0027. Make sure the cap is fully seated and locked into the cam-on position.

Quality Assurance

Calorstat RC0027 is built to OEM performance standards for direct replacement use in cooling-system service. Its stainless steel and rubber construction is selected for durability and sealing consistency in radiator-cap applications.

Compatible Vehicles

• Fits 2025 Hyundai Elantra, N/A
• Fits 2001-2016 Hyundai Elantra, N/A
• Fits 2017-2024 Hyundai Elantra, N/A
• Fits 2025 Kia K4, N/A
• Fits 2025 Kia Telluride, N/A
• Fits 2020-2024 Kia Forte, N/A
• Fits 2020-2024 Kia Forte5, N/A
• Fits 2024-2025 Mazda CX-5, N/A
• Fits 2013-2020 Mazda CX-5, N/A
• Fits 2021-2023 Mazda CX-5, N/A
• Fits 2024-2025 Subaru Crosstrek, N/A
• Fits 2018-2021 Subaru Crosstrek, N/A
• Fits 2024-2025 Subaru Forester, N/A
• Fits 2018-2021 Subaru Forester, N/A
• Fits 1998-2016 Subaru Forester, N/A
• Fits 2024-2025 Subaru Impreza, N/A
• Fits 1998-2015 Subaru Impreza, N/A
• Fits 2024-2025 Subaru Legacy, N/A
• Fits 2005-2014 Subaru Legacy, N/A
• Fits 2024-2025 Subaru Outback, N/A
• Fits 2022 Subaru Outback, N/A
• Fits 2010-2014 Subaru Outback, N/A
• Fits 2005-2007 Subaru Outback, N/A
• Fits 2025 Subaru WRX, N/A
• Fits 2018-2020 Subaru WRX, N/A
• Fits 2015-2016 Subaru WRX, N/A