Gates 31521 Radiator Cap

Reliable Radiator Cap for Chevrolet G20 and G30

The Gates OE Type Radiator Cap 31521 is designed to maintain optimal cooling system pressure for Chevrolet G20 and G30 models. This standard cap ensures proper sealing and pressure regulation to support engine cooling efficiency.

• Standard cap type with 10 psi pressure rating
• Cap depth of 1.25 inches for secure fitment
• Filler neck inside diameter of 1.61 inches (41 mm)
• Filler neck outside diameter of 2.13 inches (54 mm)
• Shell diameter measures 2.33 inches
• Compatible with optional coolant recovery systems
• Meets OE performance standards for reliable operation

About the Gates OE Type Radiator Cap Line

The OE Type Radiator Cap line from Gates is engineered to meet original equipment specifications, providing consistent pressure control and sealing for cooling systems. This product line focuses on standard caps that fit precisely and maintain system integrity, making it suitable for vehicles like the Chevrolet G20 and G30 that require dependable cooling system components.

Product Details and Specifications

The Gates 31521 radiator cap features a 10 psi pressure rating, aligning with the SAE pressure range of 9-11 psi to ensure proper coolant system pressure. Its 1.25-inch cap depth and 2.33-inch shell diameter provide a secure and accurate fit on the filler neck, which measures 1.61 inches inside diameter and 2.13 inches outside diameter. The cap supports optional coolant recovery systems, helping maintain system efficiency and preventing coolant loss. Designed for Chevrolet G20 and G30 models, this radiator cap meets OE performance standards to maintain engine temperature control.

Common Cooling System Issues Addressed

• Prevents coolant leaks by maintaining a proper seal
• Regulates system pressure to avoid overheating
• Supports coolant recovery to reduce fluid loss
• Helps maintain consistent engine operating temperature
• Prevents air entry that can cause corrosion or overheating

Installation Notes and Tips

Before installing the Gates OE Type Radiator Cap 31521, ensure the radiator filler neck is clean and free of debris. Align the cap properly and press down firmly while turning to secure it in place. Verify the cap’s pressure rating matches the vehicle’s cooling system requirements. Regular inspection of the cap and cooling system is recommended to maintain optimal performance.

Quality Assurance and Warranty

Gates OE Type Radiator Caps are manufactured to meet original equipment standards, ensuring reliable performance and durability. This product is backed by Gates’ quality assurance processes, providing confidence in fitment and function for Chevrolet G20 and G30 vehicles. Please refer to Gates’ official warranty policy for specific coverage details.