18.5-inch Radiator for LS and LT Swaps in 1967-1987 Chevy/GMC C/K Series Trucks
Installing an LS or LT engine into a 1967-1987 Chevy or GMC C/K Series truck often reveals the factory cooling system's limits under load and in traffic, with temperatures spiking during towing or idle. Featuring an 18.5 inch tall core and dedicated transmission cooler ports, this radiator provides a direct drop in solution that aligns with factory brackets for hood clearance and belt routing without modifying lines or supports. With dual electric fans that engage only when needed and a high conductivity aluminum core paired with US made tanks, it maintains steady coolant flow and rapid heat rejection in daily driving and towing.
Precision Cooling Alignment for OEM Bracketry
This radiator is engineered for a direct fit into 1967 through 1987 Chevy and GMC C/K Series frames by mirroring the original inlet and outlet positions and transmission cooler ports. Maintaining the factory core height ensures that hood clearance remains unchanged and the accessory belt path stays true to its intended routing. By eliminating the need for custom mounts or line fabrication, installation time is reduced and leak points are minimized, providing a secure connection from block to cooler. Builders benefit from maintaining straight coolant lines that follow the truck's factory contours, preserving both appearance and function. The precise alignment also means service procedures such as draining, refilling, and bleed location remain intuitive and familiar to anyone accustomed to the stock system.
Enhanced Heat Transfer with Tube and Fin Geometry
At the heart of the design lies an 18.5 inch tall high conductivity aluminum core that maximizes coolant volume and surface contact for efficient heat rejection. Its tube and fin geometry distributes coolant across multiple parallel passages, accelerating thermal transfer even under heavy towing loads or extended idling. Aluminum's natural thermal conductivity speeds the journey of heat from coolant to air, while its light weight contributes to balanced chassis dynamics and reduces stress on the front suspension. US made side tanks pair with the core to maintain consistent flow rates and resist pressure fluctuations during repeated heat cycles. This combination of height, material choice, and internal geometry ensures stable operating temperatures in both daily driving and demanding performance scenarios.
Extended Service Life with Corrosion Resistant Aluminum and Epoxy Options
Crafted from premium aluminum, the radiator core and tanks resist rust and degradation from common coolant additives and road salt, safeguarding long term durability. Customers may choose a bare aluminum finish that proudly displays TIG weld seams and precision machining or opt for a black epoxy coating that deflects stone chips and environmental contaminants. The epoxy layer adds a protective barrier without diminishing thermal conductivity, preserving rapid heat exchange while guarding against pitting. This versatility allows owners to prioritize visual appeal or rugged protection according to their environment, whether it is daily street use or off road ventures. Regular maintenance remains straightforward, as debris sheds easily from smooth aluminum surfaces or stays at bay behind the durable coating.
Trust in a precise fit and dependable cooling across LS and LT swaps. For the same radiator but without fans see our 1967-1987 GM Truck Radiator 18.5" Tall (Automatic Transmission) Without Fans.