Performance Radiator for Isuzu i-Series (2006-2008) 2.8L 2.9L 3.5L 3.7L Automatic

Heavy-Duty All-Aluminum Radiator for 2006-2008 Isuzu i-Series

Direct-Fit Cooling Optimization: Replaces factory crimped plastic-tank radiators with a reinforced all-aluminum dual-row core designed to eliminate heat-induced seam failure and stabilize coolant and transmission fluid temperatures under load.

The Stock i-Series Thermal Weakness

Factory radiators installed on the GMT355 platform utilize composite plastic end tanks crimped onto a thin aluminum core via elastomer gaskets. Prolonged thermal cycling, elevated cooling system pressures, and engine bay vibration cause the composite tanks to embrittle, craze, and crack at the inlet and outlet necks. Furthermore, the OEM single-row core lacks the heat dissipation capacity required during towing, heavy hauling, or high-ambient stop-and-go driving, leading to thermal heat soak and spiked automatic transmission temperatures.

The Engineering Solution

Constructed entirely from aircraft-grade aluminum, this replacement eliminates plastic tanks and gasket failure points via 100% TIG-welded end tanks. The dual-row racing tube core configuration expands internal fluid volume and increases surface area contact with secondary cooling fins, significantly improving convective thermal exchange. An integrated transmission oil cooler maintains optimal gearbox operating temperatures, while direct-fit mounting tabs and factory hose connections allow a straightforward bolt-on installation.

Technical Specifications

Compatibility

• 2006 Isuzu i-280 (2.8L L4 Automatic)
• 2007-2008 Isuzu i-290 (2.9L L4 Automatic)
• 2006 Isuzu i-350 (3.5L L5 Automatic)
• 2007-2008 Isuzu i-370 (3.7L L5 Automatic)

The Isuzu Heavy-Duty Caliber

Engineered to handle rigorous payload and towing demands, this fully welded aluminum unit provides structural rigidity and stable thermal management for prolonged truck service life.