Engine Oil Cooler With Gaskets For Cummins 4B3.9 6B5.9 ISB6.7 & Dodge Ram 2500-5500 2007-2019 - Replaces 3975818 3902372

Cummins diesel owners, if your engine is running hot or you're seeing oil cooling issues, this replacement oil cooler might be exactly what you need! This complete assembly fits multiple Cummins engines including the 4B3.9, 6.7N, 6B5.9, B3.3, B4.5, B5.6, B6.2, B6.7, B7, D6.7, ISB6.7, ISD6.7, ISBE, ISBE4, ISL, L9, NT743, QSB3.3, QSB5.9, QSB6.7, QSB7, QSG12, X12, and QSL9. It's also compatible with Dodge Ram 2500, 3500, 4000, 4500, and 5500 models with the 6.7L engine from 2007-2019, plus Freightliner MT45/MT55 models from 2007-2020. The part numbers covered include 3975818, 3902372, 3902434, 3903375, 3911940, 3918293, 3921558, 3928908, 3942010, and 3974127 - so you know it's a direct replacement for your specific application. The cooler comes with all necessary gaskets for proper installation and sealing. When your oil cooler fails, it can lead to serious engine problems including oil contamination, overheating, and potential engine damage - not something you want to risk with your diesel workhorse. Proper oil cooling is crucial for maintaining optimal engine temperature, especially when towing, hauling heavy loads, or operating in hot conditions. The quality construction ensures efficient heat transfer and reliable performance through demanding operating conditions. Installation requires some mechanical skill, but for experienced DIYers or professional mechanics, it's a straightforward replacement that can save you from more expensive repairs down the road. Whether you're dealing with a known oil cooler failure or doing preventative maintenance on higher-mileage equipment, having a properly functioning oil cooler is essential for your diesel engine's longevity and performance. Your Cummins will run cooler, maintain proper oil temperature, and deliver the reliable performance you depend on for work or play.