4.2.2. Engine assembly
Assembly of the engine carry out taking into account instructions подразд. «The general requirements to car repairs» in the following order.
Fig. 2.2. Marking and order of an inhaling of bolts of fastening of covers of radical bearings of a cranked shaft
Establish on the stand the pure block of cylinders. Wipe a bed fabric under loose leaves in the block and in covers of radical bearings. Establish in a bed of the block of cylinders loose leaves with lubricant flutes, previously having wiped them and having greased with engine oil. Establish persistent half rings on an average support of the block of cylinders so that their lubricant flutes were turned to a cranked shaft. Wipe a fabric radical and shatunny necks of a cranked shaft, grease them with engine oil and establish a shaft in the block of cylinders. Insert into covers of radical bearings loose leaves, grease them with engine oil and establish on the corresponding necks of a cranked shaft so that fillets of the top and bottom loose leaves were against each other. Wrap bolts of fastening of covers (fig. 2.2)
and tighten them the established moment. Turn a cranked shaft to be convinced of its free rotation at small effort. Check an axial gap of a cranked shaft (see. «Cranked shaft and flywheel»).
Fig. 2.3. Assembly of shatunno-piston group: 1 — number of dimensional group of diameter of the piston;
2 — a label on the bottom of the piston which should be directed towards a drive of camshafts; 3 — the loose leaf with an opening for greasing; 4 — the loose leaf of a cover of a rod; 5 — number for rod acquisition with a rod cover
Rods and pistons before assembly it is necessary сориентировать so that at installation the label on the bottom of the piston was sent to the block of cylinders towards a camshaft drive (fig. 2.3)
, and labels on a rod and a cover of a rod settled down against each other and were directed towards the oil filter. The opening for greasing in a rod is guided towards a starter.
Pick up fingers to rods, considering that the gap in interface a finger — the plug of the top head of a rod should make 0,05 — 0,17 mm for new details.
Heat up pistons in an oil bath to temperature 60 — 70 ° With, establish the piston on a prism and an opravka press a piston finger in the piston and the top head of a rod. In grooves of lugs of the piston establish new lock rings.
Fig. 2.4. Installation of piston rings: I\order of installation of piston rings; II\arrangement of locks of piston rings; 1 — a label on the piston, directed towards a drive of camshafts; 2 — a joint of a dilator of a maslosjemny ring; 3 — the lock of the top kompressionny and top maslosjemny ring; 4 — the lock of a maslosjemny ring; 5 — the lock of the bottom kompressionny ring
Pick up for cylinders piston rings (see «Shatunno-porshnevaya group»). The thermal gap is measured in locks of the rings placed in the cylinder on depth of 15 mm from the top end face of the block of cylinders. Check shchupy a lateral gap between rings and a wall of a piston flute. Grease with engine oil of a ring and a flute of pistons. By means of the adaptation put on the piston of a ring of well-aimed «N» up (to the piston bottom). Dissolve joints of rings as it is specified fig. 2.4
Wipe beds of rods and their cover. Wipe and insert into covers loose leaves according to the labels put at dismantling (if working loose leaves are used). Put on new shatunny bolts safety plastic tips which at the same time prevent drop-out of the top loose leaf. Grease with engine oil the piston and the cylinder. Compress piston rings the adaptation or, using a konusny opravka, insert the piston into the cylinder, thus consider requirements to a piston and rod arrangement concerning the block of cylinders.
Remove safety tips from shatunny bolts. Grease with engine oil loose leaves of a rod and a neck of a cranked shaft. Establish a rod and a cover on a neck of a cranked shaft, thus labels on a cover and a rod should be directed towards the oil filter.
Establish the holder of a back cuff of a cranked shaft with new laying, previously having pressed in it an opravka a new cuff. Establish a flywheel, having put on a carving of bolts hermetic clamp of a carving and having wrapped them the established moment.
Further operations carry out as it should be, the return to dismantling, taking into account the following.
Observe the established moments of an inhaling of carving connections.
Center a conducted disk of coupling as it is specified in подразд. "Coupling".
Establish the new oil filter.