3.1. The petrol engine in volume of 1,4 and 1,6 litres
In this part of the Head kinds of works on repair of the engines which are carried out directly on the car are described. If the engine acted in film from the car and understood, some preliminary operations on dismantling can be excluded.
Engines of 1,4 and 1,6 l concern series GA, established on cars Nissan. Engines 16-klapannye with the top arrangement of the valves, four rowed cylinders and two cam-shafts. The engine settles down across a car axis, in its forward part. Transmission is established on the left side of the engine.
Коленвал 5-basic. Axial люфт коленвала it is regulated by selection of the persistent half rings established on the top half of the average radical bearing.
Shatunnye bearings consist of two loose leaves inserted into a rod and in a cover of a rod. Rods are connected to pistons by means of fingers which freely move in a head of a rod and fixed by spring lock rings. Pistons are cast from an aluminium alloy, on pistons is provided three rings – two компрессионных and one маслосъемное.
Inlet and final valves are closed under the influence of spiral springs and move in directing plugs, запрессованных to a head of the block of cylinders together with saddles of valves. At the raised deterioration of a saddle and the plug it is possible выпрессовать and to replace new.
Cam-shafts have a drive from a chain and operate 16 valves through pushers бадейного type. Pushers are established under cam-shafts. Backlashes in valves are regulated by selection of special washers for a thickness. The bottom support of necks of cam-shafts are the beds chiseled in inflow of a head of cylinders.
Engine greasing is carried out from the oil pump with a drive from a sock коленвала. Oil passes through маслоприемник with the filter of rough clearing, further through the filter of thin clearing screwed in the block of cylinders of the engine, and moves in lubricant channels in the block of cylinders and картера коленвала from which goes to radical bearings коленвала and to basic necks of a cam-shaft. Shatunnye bearings are greased under pressure through apertures inside коленвала. Cam-shaft cams, cores of valves and other details of the engine are greased разбрызгиванием.