Oil Cooler: Description and Operation
Engine Oil CoolerThe engine oil cooler is located in front of the radiator above the gearbox oil cooler and comprises a single row matrix; on 4.0 liter models three internal cooling tubes are used; 4.6 liter models use a larger matrix incorporating six cooling tubes. Pre-formed feed and return pipes/hoses are used to link the cylinder block, oil filter and oil cooler. The oil cooler is mounted above the gearbox oil cooler, fixed to the radiator side frame.
Oil drawn through a steel gauze strainer in the sump, is pumped under pressure through the feed pipe into the oil cooler. Ambient air, forced through the front grille of the vehicle and assisted by the pull of the viscous fan, is dispersed across the oil cooler. The cooled oil then passes through the return pipe to the filter, before being distributed from the cylinder block to the various internal engine components.