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Technical Specification & Payment and Trade Terms & Delivery and Packaging

Desc.	Intercooler Core	Part No	3626715
Brand Name	Cummins, Detroit, DCEC, CCEC, XCEC etc.	Other parts	pls contact freely if you need other P/N
Engine Type	Diesel engine, Gas engine, Diesel Generator, Marine engine, Construction engine Pump engine etc.	Spare Type	Wearing spare parts, maintenance tools, repair kit, upper and lower engine gasket kit.
Condition:	Original and brand new	Applicatble industriy	Retail, marine engines, Construction works, Energy & Mining etc
Key Word:	Original spare parts and engine repair tool kits	Trade terms	FOB EXW CIF DDU DDP, Door to door is available in some countries.
Delivery time:	Most parts are in stock, bulk order based on qty	Payment	T/T, L/C, D/A, Alipay, Western Union, Paypal etc.
Place of origin	China/USA/Japan/Austria/Mexico	Package	Neutral or original packaging
About the product	The primary function of the oil cooler is to maintain the engine oil temperature within an optimal range (80 - 105℃), ensuring that the oil retains its lubricating properties. During operation in high-temperature areas of the diesel engine, the oil absorbs significant heat and serves as a cooling medium for pistons, leading to increased oil temperature, reduced viscosity, and potential oxidation and degradation. Therefore, it is crucial to promptly reduce the oil temperature to ensure the diesel engine operates normally. I. Types of Oil Coolers A. Function and Importance The oil cooler cools the lubricating oil, maintaining its temperature within the normal operating range. In high-power, highly-stressed engines, where thermal loads are substantial, an oil cooler is essential. As engine temperatures rise, oil viscosity decreases, reducing lubrication effectiveness. Consequently, many engines are equipped with oil coolers to lower oil temperature and maintain appropriate viscosity. The oil cooler is integrated into the lubrication system's circulating oil circuit. B. Full-flow Oil Cooler The full-flow oil cooler (also known as a water-cooled oil cooler) functions as a liquid-to-liquid heat exchanger. Engine oil acts as the heat medium, while water serves as the coolant. Typically, oil flows through the tubes, and water circulates in the shell side. Counter-flow heat exchange is commonly employed, meaning the oil outlet and water inlet are located at the same end of the heat exchanger. Due to efficient heat transfer between oil and water, the overall heat transfer coefficient should be no less than 1000 W/m²-K, allowing for a compact design. The oil can be cooled to just a few degrees above the inlet water temperature (e.g., 5 degrees). The actual cooling effect depends on the water-to-oil flow ratio; higher water flow results in better cooling performance. For example, the Cummins 6BT diesel engine uses a full-flow cooling type (FFC) and large camshaft-type oil cooler, as illustrated in Figure 1. The oil cooler consists of a core made from multiple pure copper tubes of uniform diameter and cross-arranged baffles along the axial direction, housed within a cooler body and cover. Oil flows outside the copper tubes, moving axially around the baffles from front to back. Cooling water flows from back to front inside the tubes, maintaining the oil temperature within a specified range. On diesel engines with full-flow cooling type (FFC) lubrication, a pressure regulating valve is installed in the oil cooler bracket before the oil filter to control pre-filter oil pressure. In variable-flow cooling type (DFC) lubrication systems, the oil cooler includes a bypass valve with temperature-controlled opening and closing to regulate the amount of oil flowing through the cooler. When the temperature is below 110℃, the bypass valve remains closed, allowing only about half of the oil to pass through the cooler. When the oil temperature exceeds 110℃, the bypass valve opens, directing all oil through the cooler. C. Plate-fin Oil Cooler Cummins K38 and K50 diesel engines utilize plate-fin heat exchangers for their oil coolers, as shown in Figure 2. The cooler core is installed in the main oil passage within the cylinder block. The O-ring seal has been modified; the new O-ring features two red bands and rapidly expands upon contact with oil. Therefore, when installing the cooler core into the cylinder block, the O-ring must be lubricated with vegetable oil. The O-ring is not reusable. The oil cooler is a device designed to enhance the heat dissipation of lubricating oil, keeping it at a lower temperature. In high-performance, high-power, highly-stressed engines, where thermal loads are significant, an oil cooler is indispensable. The oil cooler is placed within the lubrication system's oil circuit and operates similarly to a radiator. It comprises an aluminum alloy cast oil cooler cover and a brazed plate-fin core. Cooling water flows in the space formed by the oil cooler cover and the engine block, while lubricating oil circulates through the plate-fins. Heat transfer in the plate-fin oil cooler primarily occurs via conduction through the fins and convection between the fins and the coolant. This ensures that the oil temperature (90℃ - 120℃) and viscosity remain within a reasonable range. The oil cooler is typically installed on the engine block and is integrated with the cylinder head cover during installation.

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For Cummins Diesel Engine K38 Cooling System Intercooler Core 3626715 Aftercooler Core

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