Radiator for Chevrolet Blazer (1973-1974) 7.4L

High-Efficiency 3-Row Aluminum Radiator for 1973-1974 Chevrolet Blazer (K5)

What it Does: The 3-row aluminum radiator replaces the failure-prone factory cooling unit on the 1973-1974 Chevrolet Blazer to optimize thermal dissipation and prevent high-load engine overheating.

The Stock Chevrolet Blazer Thermal Inefficiencies

The original copper-and-brass radiators equipped in early K5 Blazers are notorious for galvanic corrosion, cracked solder joints, and severe core clogging after decades of service. When tasked with cooling the massive thermal mass of the Mark IV 454 7.4L big-block V8, the OEM design succumbs quickly to heat soak under heavy towing or low-speed rock crawling. Restricted tube diameters and separating cooling fins compromise convective heat rejection, leading to dangerously spiked coolant temperatures and blown head gaskets.

The Engineering Solution

This direct-replacement unit utilizes a 3-row full aircraft-grade aluminum crossflow architecture with precision TIG-welded tanks to eliminate the failure points common to glued plastic or soldered copper assemblies. Featuring a generous 28.23 x 18.82 x 2.44-inch core, it dramatically increases coolant capacity and expands thermal surface area for maximum heat transfer. An integrated internal transmission oil cooler stabilizes automatic transmission fluid temperatures simultaneously, and the 1.50-inch inlet/outlet bungs ensure optimal coolant cycling without hydraulic restriction.

What's Included

• 1 x 3-Row Full Aluminum Radiator
• 1 x High-Pressure Radiator Cap

Technical Specifications

Compatibility

• 1973 Chevrolet Blazer (7.4L V8)
• 1974 Chevrolet Blazer (7.4L V8)

Frequently Asked Questions & Fitment Warnings

Does this fit the K5 Blazer?

Yes, this is a direct fit for the 1973-1974 Chevrolet Blazer equipped with the Mark IV 454 7.4L engine.

Are mounting hardware or step-by-step installation instructions included?

Instructions and mounting hardware are not included; professional installation alongside a complete cooling system flush and air bleed is highly recommended.

The Chevrolet Heavy-Duty Caliber

Built to withstand the structural stresses of off-road trail driving and high-demand towing, this aluminum radiator provides the durability and cooling headroom required to keep your classic K5 running cool under the most severe operating conditions.