This oil cooler transfers heat from the engine lubricant to the passing airflow, maintaining the oil within its operating temperature range. It is mounted in the cooling circuit between the oil filter housing and the return line to the sump. A restricted or damaged cooler core reduces oil flow and raises oil temperature, which accelerates wear on bearings and turbocharger components. The manufacturer machines the core and end tanks to match the original assembly's sealing surfaces, so no additional gaskets or adapters are required during installation.