LS Radiator for 1970-1981 Pontiac Firebird (AutoTrans)
Swapping an LS engine into a 1970-1981 F Body Firebird with an automatic transmission often overwhelms the stock cooling setup. The 1970-1981 Firebird Radiator (AutoTrans) is designed to meet this challenge by offering precise thermal management and corrosion resistance for sustained performance. Crafted from fully TIG welded aluminum, it uses all factory mounting points and includes complete installation hardware for a true bolt-in fit. Its high flow core rejects heat quickly on highway cruises or spirited backroad runs, while the durable aluminum core resists pitting and warping over time.
Precision TIG Welded Aluminum Construction
The 1970 1981 Firebird Radiator employs fully TIG welded aluminum tanks and core to form uniform seams that resist leaks and warping under extreme temperature cycles. This welding method creates a precise metal bond that preserves the integrity of coolant passages by eliminating weak joints and reducing the chance of stress cracks. Relying on high quality aluminum keeps the assembly light enough to improve throttle response while remaining strong under vibration and thermal loads. Solid welds ensure lasting durability when a modern LS engine is running at high output on highway cruises or spirited backroad drives. The result is a radiator structure that stands up to repeated heat cycling and road shock without failure.
Optimized Cooling Performance and Thermal Management
A dense fin and tube arrangement across the core maximizes surface area for efficient heat transfer from coolant to passing air. Coupled with premium grade aluminum, this configuration rejects heat rapidly and maintains stable engine temperatures whether towing a trailer or exploring winding country roads. Precisely sized coolant passages ensure consistent flow and pressure to avoid hotspots in critical areas of the head and block. The core thickness is balanced to deliver high cooling capacity without excessive bulk, promoting improved underhood airflow and reduced parasitic drag on cooling fans. Overall thermal management is tuned to support sustained operation under load while protecting internal engine components.
Inherent Corrosion Resistance and Durable Finish Choices
Aluminum naturally forms a protective oxide layer that shields the core from pitting and corrosion over time, extending service life in humid or salty environments. For those who want additional protection, the optional black epoxy coating provides a smooth, hard barrier against road debris and chemical exposure while lending a refined appearance to the engine bay. The classic bare aluminum finish remains an attractive low maintenance choice, encouraging a self-healing oxide layer that prevents corrosion without repainting. Both finishes are applied at the factory under controlled conditions to ensure uniform coverage, simplifying cleanup and upkeep for years of reliable performance.
True Bolt In Fitment for Automatic Firebird Frames
Designed exclusively for 1970 to 1981 Pontiac Firebird bodies equipped with automatic transmissions, this radiator uses all original mounting locations and includes a complete hardware set for a true bolt in installation. Bracket positions, hose connections and fan shroud spacing match factory dimensions so no custom mounts or welding are required. Detailed instructions walk installers through each step, making it easy for both home mechanics and professional shops to avoid alignment issues. By preserving the stock chassis geometry, coolant lines line up precisely and the radiator sits securely without stress. The direct fit design cuts installation time and helps ensure a smooth LS swap experience.
Trust this radiator to deliver precise thermal control and long service life. For the same radiator but with fans see our 1970-1981 Firebird Radiator (Automatic Transmission) with Fans.