Caterpillar 7W2225 Cylinder Head – 3408B 18.0L V8 DI Cast Iron

The Caterpillar 3408B 18.0L V8 engine is a legendary power plant for heavy earthmoving and quarry operations. At the heart of this high-torque engine, the Caterpillar 3408B cylinder head (OEM 7W2225) is engineered to manage intense combustion pressures in Direct Injection (DI) configurations. Ruich Value supplies this precision-cast assembly to restore factory volumetric efficiency for heavy-duty workhorses like the CAT D8L dozer and 988F wheel loader. Manufactured from high-density alloyed cast iron, our heads are designed to maintain structural integrity across thousands of high-load operating hours.

Thermal management is a critical pain point for industrial V8 blocks. High-hour mining units often suffer from thermal fatigue cracking between the valve seats and water jacket erosion due to uneven cooling. Unlike standard 3408 heads, our 7W2225 unit is optimized for the 3408B long stroke (165mm) engine, providing the necessary heat dissipation to prevent the head gasket erosion common in V8 platforms. These structural reinforcements permanently address the vulnerabilities found in original 4N1868 castings, particularly in high-EGT mining duty.

Engine rebuilders must distinguish between DI and Pre-Combustion (PC) systems. The 7W2225 is for Direct Injection only and is not interchangeable with PC heads (7N0858). As a trusted provider of wholesale Caterpillar head solutions, we ensure every unit is 100% pressure tested and vacuum checked. Whether you are overhauling a 631E scraper engine or maintaining a 988B loader, our 18.0L V8 diesel head delivers OEM-spec 14.5:1 compression and factory-direct wholesale pricing for global fleets.

Our industrial cylinder head catalog covers the entire Caterpillar 3400 series family, including the V8 3408 and V12 3412 platforms. Explore our whole Caterpillar Categories for additional valvetrain components, oil coolers, and master engine rebuild kits.

• Reinforced Deck Thickness: Specifically cast with thicker combustion face to handle the high peak pressures of the 800HP+ 18.0L V8 platform.
• V8 Optimized Cooling: Improved internal water jacket passages ensure uniform cooling across both banks, preventing the thermal cracking common in quarry duty.
• Three-Stage Quality Testing: Every 7W2225 head undergoes visual casting inspection, vacuum valve testing, and high-pressure jacket testing prior to global export.
• Expert Logistics for V8 Units: Secured in custom reinforced wooden crates to ensure damage-free arrival for these heavy, high-value rotating and top-end components.

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