CSF 4515 Radiator Cap 16 PSI Small Cap

The CSF 4515 is a small-style radiator cap rated at 16 PSI, designed as a direct replacement for older automobile cooling systems. CSF radiator caps meet or exceed all OE and industry standards, ensuring reliable pressure regulation and optimal cooling system performance.

Key Features:

• 16 PSI pressure rating for optimal cooling system operation
• Small cap design for older vehicle applications
• Built from the finest materials to keep coolant inside your radiator
• Dual spring-loaded valve system for pressure regulation and vacuum relief
• Part of CSF's line covering 95% of all applications
• Manufactured in ISO-certified facilities

How It Works:

When pressure increases above the PSI rating, the cap releases coolant into the overflow tank through a spring-loaded valve, allowing the system to remain at optimal PSI. During engine cool-down, a second valve opens to draw coolant back from the overflow tank, preventing air pockets and protecting hoses from collapse due to vacuum pressure.

Always check the old radiator pressure cap for wear-and-tear when replacing your radiator, and replace with a quality, matching pressure cap when necessary. The CSF 4515 provides reliable sealing and pressure control to maintain proper cooling system function and prevent overheating.