Oil circulation circuit (Mondeo 1)

Ford Mondeo engines are equipped with a so-called circulating lubrication system. The oil pump sucks oil from the oil pan through a filter screen and passes it through the oil filter. On the pressure side of the oil pump there is a safety valve (pressure control valve). If the pressure is too high, the valve opens and some of the oil can flow into the oil pan.

In the center of the filter cartridge, the filtered oil enters the main oil channel. There is a hydraulically operated switch that shows the driver that the oil pressure is too low, i.e. the oil pressure indicator light on the instrument panel lights up. If the filter is clogged with dirt, the bypass valve feeds unfiltered oil directly into the main oil channel.

The main oil channel has channels for lubricating the crankshaft bearings. Oil is supplied to the connecting rods through oblique holes in the crankshaft. To cool the piston bottom, oil is sprayed from below through jets.

At the same time, engine oil rises into the cylinder head and lubricates the camshaft bearings and plate or hydraulic tappets there.

In 2.0L petrol and diesel engines, the oil is cooled in a heat exchanger on the oil filter flange, which is connected to the coolant circuit.