1984-1989 Corvette Radiator Surge Pump for Coolant Overflow Prevention
When adapting an LS or LT engine into a C4 chassis, preventing radiator overflow under cornering loads is crucial, and the 1984-1989 Corvette Radiator Surge Pump delivers precise control. This compact assembly mounts directly to the original 1984 through 1989 radiator and supports both automatic and manual transmission layouts, keeping the Walbro 255lph pump fully submerged during lateral shifts or rapid acceleration. Built from CNC machined 6061 T6 aluminum with an anodized finish, the housing resists corrosion and maintains a low mass profile for balanced handling in modified engine bays. It uses prewired connectors and standard AN fittings to streamline plumbing and wiring, ensuring leak free operation from the first startup.
Submerged Design Ensuring Consistent Fuel Delivery
Positioning the Walbro 255lph pump entirely below the fuel level eliminates the risk of vapor lock when lateral forces rise in tight turns or during rapid acceleration. Continuous immersion maintains a uniform suction head, preventing momentary dips in pressure that can cause hesitation or lean spikes. This layout is especially valuable in a C4 chassis where fuel slosh under cornering loads would otherwise expose the pump to air pockets. By preserving a fully flooded pump inlet, the system locks in steady flow regardless of chassis motion. Drivers benefit from smooth throttle response at all times, transforming aggressive driving into predictable engine output.
6061 T6 Aluminum Housing for Mass and Strength Balance
Crafted from billet 6061 T6 aluminum, the housing combines high tensile strength with a low weight footprint critical for chassis balance. CNC machining holds tight tolerances on mating surfaces and threaded ports, reducing microgaps that lead to leaks over time. The alloy's natural resistance to warping under heat and vibration ensures the pump remains aligned through repeated thermal cycles. This precision construction also contributes to an overall drop in rotating mass compared to cast alternatives. As a result, the assembly integrates seamlessly into the Corvette radiator location without compromising handling.
Anodized Finish Guarding Against Corrosion
The anodized layer forms a dense oxide barrier that bonds directly to the aluminum substrate, protecting against chemical attack, abrasion, and moisture intrusion. Unlike paint or powder coating, this finish will not peel or flake when exposed to road debris, fuel spills, or heat. Maintenance crews appreciate that the hard surface resists scratches and preserves sealing surfaces in contact with AN fittings. Over years of service, the housing maintains both structural integrity and a clean appearance without additional treatments. This enduring protection is vital for keeping the surge pump assembly leak free and visually intact.
Integrated Wiring and AN Fittings for Streamlined Setup
Prewired connectors tailored to the 255lph pump slash installation time and eliminate guesswork for custom harness fabrication. A dedicated wiring pigtail and durable mounting hardware allow installers to focus on routing rather than splicing or soldering. Six AN ports provide secure connections for inlet and outlet lines, ensuring leak free operation without the need for adapters. Compatibility with gasoline, ethanol and methanol fuels broadens tuning options for street or track applications. This cohesive package delivers a plug in approach that minimizes potential error points and gets the engine running reliably on first start.
Count on MuscleRods for precise coolant management. For a similar EFI surge tank but this is a dual pump see our MuscleRods EFI Surge Tank - Dual Pumps.