4.6. 5.4 LITER. Front. P/S cooler. A stand alone cooler used to cool the Power Steering system. Connects Power Steering components to allow fluid flow. Cooler to Reservoir. From 12/03/07. Return Hose for Power Steering. To 12/03/07. Coil - Cooling. Connector. Line. Manifold. Oil cooler. Pressure.