High Performance Radiator for Buick Cadillac Century LeSabre Regal DeVille Eldorado Fleetwood (1973-1986) 3.0L 3.8L 5.0L 5.7L

High-Capacity 3-Row Aluminum Radiator & Fan Kit for 1973-1986 Buick, Cadillac Century, LeSabre, Regal, DeVille, Seville, El Dorado, Fleetwood (GM A/B/C/E-Body)

Replaces restrictive, aging factory copper-brass radiators to significantly lower engine operating temperatures and improve overall thermal efficiency.

The Stock GM Malaise-Era Cooling Vulnerability

The stock GM A, B, C, and E-Body platforms from the 1970s and 1980s were originally equipped with heavy, inefficient copper-brass radiators. Over decades of heat cycling, these factory units suffer from internal scaling, solder joint fatigue, and diminished thermal transfer capabilities. When paired with GM's 3.8L V6 or 5.7L V8 engines, this compromised cooling architecture inevitably leads to severe heat soak, elevated coolant pressures, and catastrophic overheating during low-speed cruising or heavy engine loads. Furthermore, the belt-driven mechanical fans parasitize vital engine horsepower and fail to provide adequate airflow at idle.

The Engineering Solution

This engineered 3-row aluminum radiator upgrade fundamentally resolves OEM thermal limitations. Constructed with aerospace-grade, TIG-welded aluminum, the massive 28.23-inch by 16.85-inch core maximizes surface area, improving heat dissipation by up to 45% over stock. The integration of a built-in transmission oil cooler (1/2" 20 straight thread G1/4) protects critical drivetrain components. To modernize the airflow dynamics, the system includes a high-velocity 12-inch slim electric fan pulling 800 CFM at 2000 RPM. This is governed by an intelligent thermal relay switch—activating at 180°F and deactivating at 165°F—ensuring precise, automated temperature management while completely eliminating the parasitic drag of a factory mechanical fan clutch. A CNC-machined filler neck and OEM-style brass petcock ensure long-lasting, leak-free performance.

Technical Specifications

Compatibility

• 1973-1986 Buick Century, LeSabre, Regal (3.0L, 3.8L, 5.0L, 5.7L)
• 1973-1986 Cadillac DeVille, Seville, El Dorado, Fleetwood (3.0L, 3.8L, 5.0L, 5.7L)
• Chevrolet Bel Air 5.7L 1971 1972 1973 1974
• Chevrolet Biscayne 5.7L 1971 1972
• Chevrolet Blazer 4.1L 1973 1974
• Chevrolet Blazer 4.8L 1973
• Chevrolet Blazer 5.0L 1973
• Chevrolet Blazer 5.7L 1973 1974
• Chevrolet Brookwood 5.7L 1971 1972
• Chevrolet C10 4.1L 1975 1976 1977 1978 1979 1980
• Chevrolet C10 4.8L 1975 1976 1977 1978 1979 1980
• Chevrolet C10 5.0L 1977 1978 1979 1980
• Chevrolet C10 5.7L 1975 1976 1977 1978 1979 1980
• Chevrolet C10 Pickup 4.1L 1973 1974
• Chevrolet C10 Pickup 4.8L 1973 1974
• Chevrolet C10 Pickup 5.0L 1973
• Chevrolet C10 Pickup 5.7L 1973 1974
• Chevrolet C10 Suburban 4.1L 1973 1974 1975 1976 1977 1978 1979 1980
• Chevrolet C10 Suburban 4.8L 1973 1974
• Chevrolet C10 Suburban 5.0L 1973 1977 1978 1979
• Chevrolet C10 Suburban 5.7L 1973 1974 1975 1976 1977 1978 1979 1980
• Chevrolet C20 4.1L 1975 1976 1977 1978 1979 1980
• Chevrolet C20 4.8L 1975 1976 1977 1978 1979 1980
• Chevrolet C20 5.0L 1977 1978 1979 1980
• Chevrolet C20 5.7L 1975 1976 1977 1978 1979 1980
• Chevrolet C20 Pickup 4.1L 1973 1974
• Chevrolet C20 Pickup 4.8L 1973 1974
• Chevrolet C20 Pickup 5.0L 1973
• Chevrolet C20 Pickup 5.7L 1973 1974
• Chevrolet C20 Suburban 4.1L 1973 1974
• Chevrolet C20 Suburban 4.8L 1973 1974 1975 1976 1977 1978 1979
• Chevrolet C20 Suburban 5.0L 1973 1977 1978 1979
• Chevrolet C20 Suburban 5.7L 1973 1974 1975 1976 1977 1978 1979 1980
• Chevrolet C30 4.1L 1975 1978 1979 1980
• Chevrolet C30 4.8L 1975 1976 1977 1978 1979 1980
• Chevrolet C30 5.0L 1978 1979
• Chevrolet C30 5.7L 1975 1976 1977 1978 1979 1980
• Chevrolet C30 Pickup 4.1L 1973 1974
• Chevrolet C30 Pickup 4.8L 1973 1974
• Chevrolet C30 Pickup 5.0L 1973
• Chevrolet C30 Pickup 5.7L 1973 1974
• Chevrolet Caprice 4.1L 1977 1978 1979
• Chevrolet P30 4.8L 1975

The GM Classic Cruiser Standard

Engineered for the demanding environments of heavy classic American steel, this aluminum radiator setup guarantees unwavering reliability and sustained cooling power, whether you are enduring stop-and-go city traffic or out on the open highway.