Description

The Cummins Oil Cooler 3904353 (7 Plate) is a high-efficiency diesel engine cooling component designed to regulate engine oil temperature , ensuring stable lubrication and long-term engine protection in Cummins diesel engines. This oil cooler is a direct replacement for Cummins OEM part number 3903470 , making it ideal for engine rebuilds, overhauls, and oil system repairs. Featuring a 7-plate stacked design , this oil cooler provides enhanced heat dissipation by increasing surface area for efficient thermal exchange between engine oil and coolant. The robust construction allows it to withstand high oil pressures, continuous heat cycling, and heavy-duty operating conditions common in on-highway, industrial, and equipment applications. Manufactured from durable, corrosion-resistant materials , the Cummins 3904353 oil cooler helps prevent oil overheating, viscosity breakdown, and premature wear of critical engine components such as bearings, crankshaft journals, and camshaft assemblies. Maintaining proper oil temperature is essential for consistent oil pressure, reduced friction, and extended engine service life. Designed for accurate fitment and OEM-spec performance , replacing the oil cooler during an engine overhaul is strongly recommended—especially when contamination, internal blockage, or heat-related degradation is present—to prevent repeat failures and protect new internal engine components. This oil cooler is commonly used in Cummins diesel engine rebuild, overhaul, and oil cooling system service applications , including trucks, industrial engines, and heavy-duty equipment.