Cooler Pump Continuous Duty Buna Diaphragm

The TILTON Cooler Pump Continuous Duty Buna Diaphragm (model 40-527) is a purpose-built fluid circulation pump engineered for high-demand cooling system applications in racing, off-road, and motorsport environments. Delivering 1–2 gallons per minute of consistent flow, this diaphragm pump maintains steady fluid transport without the vibration and complexity of traditional impeller designs, making it ideal for drivers who need reliable temperature management under sustained throttle.

The pump features 3/8-inch NPT inlet and outlet ports, which integrate into standard motorsport cooling circuits with minimal adapter requirements. Its Buna diaphragm construction delivers proven chemical compatibility across a wide range of coolant formulations—from traditional ethylene glycol to modern long-life and racing-specific coolants. Rated for continuous duty operation, the 40-527 pump handles the sustained demand of multi-hour endurance events and high-performance street driving without fatigue failure or performance degradation. At 6.42 pounds with compact dimensions (4.5 x 4.35 x 9.85 inches), it fits tight engine bays common in race cars, track-focused builds, and retrofitted cooling systems where space is limited.

This pump serves drivers and technicians building independent cooling solutions—whether for engine bay supplemental cooling, transmission coolers, intercooler circuits, or custom radiator setups. It's particularly valuable in applications where OEM cooling proves insufficient under racing conditions or when upgrading fluid cooling on LS-swapped, turbo-charged, or heavily modified engines. The diaphragm design eliminates cavitation issues common with centrifugal pumps in high-altitude or low-pressure applications, making it a trusted choice for serious motorsport builders who demand consistent, failure-free operation.