Performance Radiator for Pontiac LeMans (1974-1975)

High-Capacity Aluminum Radiator for 1974-1975 Pontiac LeMans

This 3-row aluminum radiator and dual electric fan kit replaces the restrictive, prone-to-clogging factory copper-brass unit to significantly lower engine coolant temperatures during heavy loads or low-speed cruising.

The Stock LeMans Cooling Limitations

The original factory copper-brass radiators equipped in the mid-70s GM A-Body chassis were adequate for stock power levels but fall completely short during extended idling, performance driving, or when paired with a modified Pontiac V8. Over decades of heat cycling, the factory solder joints degrade, scale builds up within the narrow brass tubes, and overall thermal efficiency plummets. This leads to catastrophic heat soak, vapor lock, and runaway coolant temperatures, especially in summer traffic. Furthermore, the stock mechanical clutch fan drains parasitic horsepower from the water pump pulley while failing to move adequate air at idle, compounding the thermal management issues.

The Engineering Solution

This complete cooling package directly addresses A-Body thermal limits by upgrading to a 3-row, high-performance racing spec aluminum core. Aluminum offers superior heat dissipation compared to vintage brass, and the 16 6/7" x 28 1/4" core design maximizes the fin surface area exposed to ambient airflow. The inclusion of a bespoke aluminum shroud completely seals the core, ensuring that the twin 12-inch 12V electric fans pull a combined 3,460 CFM (1,730 CFM each) strictly through the cooling fins rather than pulling ambient air from the engine bay. These 10-blade plastic fans spin at a maximum of 2,250 RPM with an efficient 12.7-amp draw, eliminating parasitic mechanical drag on the engine. Additionally, the integrated transmission oil cooler (φ32*215*G1/4 Z) supports both automatic and manual applications, safeguarding transmission fluid from critical viscosity breakdown under load.

Technical Specifications

Compatibility

• 1974 Pontiac LeMans (Automatic and Manual Transmissions)
• 1975 Pontiac LeMans (Automatic and Manual Transmissions)

The Pontiac Standard

Built for the torque-heavy demands of classic American muscle, this cooling upgrade ensures consistent operating temperatures, preventing pre-ignition and keeping your Pontiac V8 safely within its thermal limits during both spirited driving and summer traffic idling.