Ford Mondeo engine lubrication system - is a part of Ford Mondeo repair manuals: Engines. This part contains the detailed description of Ford Mondeo engine lubrication system with engine diagrams for Ford Mondeo with four-cylinder petrol engines, including special/limited editions (1597cc, 1796cc, 1988cc), Diesel and V6 engines.
Ford Mondeo engine lubrication system - general description
Lubrication is by means of an eccentric-rotor trochoidal pump, which is mounted on the crankshaft right-hand end, and draws oil through a strainer located in the sump. The pump forces oil through an externally-mounted full-flow cartridge-type filter - on some versions of the engine, an oil cooler is fitted to the oil filter mounting, so that clean oil entering the engine's galleries is cooled by the main engine cooling system. From the filter, the oil is pumped into a main gallery in the cylinder block/crankcase, from where it is distributed to the crankshaft (main bearings) and cylinder head.
Ford Mondeo engine lubrication system (inset showing longitudinal cross-section):
1 - main oil gallery;
2 - from oil filter;
3 - oil pump;
4 - cylinder head oil-retaining valve;
5 - cylinder head oil gallery;
6 - cylinder head oil supply;
7 - oil return;
8 - piston-cooling oil spray (where fitted);
9 - oil filter - oil cooler not shown here.
The big-end bearings are supplied with oil via internal drillings in the crankshaft. On some versions of the engine, each piston crown is cooled by a spray of oil directed at its underside by a jet. These jets are fed by passages off the crankshaft oil supply galleries, with spring-loaded valves to ensure that the jets open only when there is sufficient pressure to guarantee a good oil supply to the rest of the engine components; where the jets are not fitted, separate blanking plugs are provided, so that the passages are sealed, but can be cleaned at overhaul.
Piston-cooling oil jet details:
1 - oil jets (when fitted);
2 - oil flow - only when valve opens at set pressure;
3 - oil spray;
4 - blanking plug (when fitted).
The cylinder head is provided with two oil galleries, one on the inlet side and one on the exhaust, to ensure constant oil supply to the camshaft bearings and hydraulic tappets. A retaining valve (inserted into the cylinder head's top surface, in the middle, on the inlet side) prevents these galleries from being drained when the engine is switched off. The valve incorporates a ventilation hole in its upper end, to allow air bubbles to escape from the system when the engine is restarted.
While the crankshaft and camshaft bearings and the hydraulic tappets receive a pressurised supply, the camshaft lobes and valves are lubricated by splash, as are all other engine components.
from Ford Mondeo repair manuals
