Ford Fokus>> Engines>> Variants of engines Ford Focus>> Base complete set of engine Zetec-E
Drive of valves
With application of modern materials and change of camshafts the great attention is given to mechanical pushers of valves. Ford recommends to check thermal backlashes of valves each 100 000 km of run, and also at engine repair. For installation of backlashes adjusting washers are used. There are 52 sizes of the washers different on a thickness. The size of a thickness of a washer is put on an underside (so, for example, value 222 means a thickness of a washer of 2,22 mm).
In connection with limitation of working space at adjustment of thermal backlashes of valves use the special adaptation. Backlashes of valves measure on the cold engine with the greatest accuracy. The backlash is measured between a cam of a camshaft and an adjusting washer. For inlet valves the backlash makes 0,11—0,18 mm, and for final — 0,27—0,34 mm.
Both camshafts are set in motion from a cranked shaft by a gear belt. Belt service life makes 150 000 km of run or 10 years of operation, except for cases when the gear belt at repair work is dismantled and replaced with the new. Натяжитель a belt provides a necessary tension of a belt during all term of operation.
The cranked shaft leans against 5 radical bearings. On the central radical bearing persistent rings against axial displacement of a cranked shaft are established. All rods are numbered from the first to the fourth. Replacement of covers шатунных bearings and rods at engine repair is not supposed. Rigid oil картер reduces engine vibration. Oil картер fastens to the block of cylinders and it is condensed with hermetic WSE-M4G-323-A6 which is put by a layer about 3 mm, thus the lining is not used.