Performance Radiator for Mazda B-Series (1998-2010) 3.0L 4.0L Automatic

Direct-Fit High-Efficiency Aluminum Performance Radiator for 1998-2010 Mazda B-Series

What it Does: Upgrades the factory cooling circuit with an all-aluminum, dual-row core designed to prevent thermal runaway and maintain stable automatic transmission temperatures during heavy payload or towing cycles.

The Stock B-Series Thermal Vulnerability

Factory radiators on 1998-2010 Mazda B-Series (B3000 and B4000) rely on plastic end-tanks crimped to a thin single-row aluminum core using elastomer gaskets. Over repeated heat cycles, the plastic embrittles, leading to stress fractures at the inlet neck and tank seam leaks under pressure. Furthermore, demanding hauling conditions quickly overwhelm the low-density OEM core, causing rapid heat soak that elevates engine coolant temperatures and overstresses the integrated transmission cooler.

The Engineering Solution

This heavy-duty unit eliminates structural failure points by utilizing 100% TIG-welded, aircraft-grade all-aluminum construction with no failure-prone crimped plastic tanks. Featuring a crossflow 2-row performance tube-and-fin configuration, it dramatically increases surface contact area and coolant volume for superior thermal dissipation. The core measures approximately 20-7/8 in x 23-1/2 in (overall dimensions 26-1/2 in x 31-1/4 in) with standard 1-1/2 in inlet and outlet ports. It integrates an internal 26 mm x 305 mm transmission oil cooler (5/8-18 UNF fittings) to ensure optimal automatic transmission line pressure and fluid longevity.

Technical Specifications

Compatibility

• 1998-2008 Mazda B3000 3.0L V6 Automatic Transmission
• 1998-2010 Mazda B4000 4.0L V6 Automatic Transmission
• Note: Will not fit 1985-1994 Ranger / B-Series 2.0L/2.3L variants due to alternate core dimensions.

The Mazda Workhorse Standard

Engineered for severe duty cycles, this all-aluminum drop-in assembly restores cooling headroom and ensures long-term transmission reliability whether tackling off-road trails, daily job site hauling, or highway towing.