Cummins Oil Cooler, 3959031

replaces: 3959031, 4896407
5.9 ISB RGT

Oil coolers should always be replaced after a catastrophic engine failure or when rebuilding an engine.

An oil coolers primary function is to cool the engine lubricating oil, which in turn lowers the temperature of critical engine components, primarily the engine bearings. When oil exceeds normal operating temperatures, it loses viscosity and lubricating properties. When this happens, the oil begins to break down and deteriorate very quickly. Our premium grade oil coolers help extend the life of you engine oil and the longevity of your engine.