4.3. Block of cylinders

Fig. 2.6. Details of the block of cylinders and krivoshipno-conrod mechanism of the SR20DE engine: 1 — a gas distribution mechanism drive chain cover; 2 — an arm of fastening of the generator; 3 — the water pump; 4 — the block of cylinders; 5 — the holder of a back cuff of a bent shaft; 6 — persistent half rings; 7 — a flywheel; 8 — a back cover; 9 — a bent shaft; 10 — an insert of the radical bearing; 11 — a cover of the radical bearing; 12 — a bed of radical bearings of a bent shaft; 13, 14 — the maslootrazhatelny screen; 15 — an aluminum case; 16 — a maslouspokoitelny guard; 17 — a steel stamped case; 18 — a stopper of a drain opening; 19 — a cover; 20 — a rod and a cover of a rod; 21 — inserts of the lower head of a rod; 22 — lock rings; 23 — a piston finger; 24 — the plug of the top head of a rod; 25 — the piston; 26 — piston rings; 27 — an oil receiver with the filter of the oil pump; 28 — a sealing ring

Fig. 2.7. Measurement of height of the block of cylinders

Fig. 2.5. Details of the block of cylinders and krivoshipno-conrod mechanism of GA14DE and GA16DE engines: I \with the mechanical transmission; II \with the automatic transmission; 1 — the block of cylinders; 2 — the holder of a back cuff of a bent shaft; 3 — a drain stopper of cooling liquid of the block of cylinders; 4 — an arm; 5 — inserts of radical bearings of a bent shaft; 6 — persistent half rings of a bent shaft; 7 — a bent shaft; 8 — covers of radical bearings of a bent shaft; 9 — the plug of the drive of the oil pump; 10 — an asterisk of a bent shaft; 11 — segment splines; 12 — a cover of the lower head of a rod; 13 — connecting rods; 14 — a rod; 15 — lock rings; 16 — a piston finger; 17 — the piston; 18 — an oil scraper ring; 19 — the lower compression ring; 20 — the top compression ring; 21 — a back cuff of a bent shaft; 22 — a back cover; 23 — a flywheel; 24 — the lower cover; 25 — a back cover; 26 — the conducted disk

The block of cylinders pig-iron, is cast for a single whole with cylinders (fig. 2.5 and 2.6). Cylinders on diameter are divided into three dimensional groups (tab. 2.1). Nominal height of the block of cylinders of GA engines makes And = 213,95 — 214,05 mm (fig. 2.7).

Diameter of the piston, mm	Engine model
	GA14DE	GA16DE	SR20DE
1 - dimensional group	73,60-73,61	76,00-76,01	86,00-86,01
2nd dimensional group	73,61-73,62	76,01-76,02	86,01-86,02
3rd dimensional group	73,62-73,63	76,02-76,03	86,02-86,03

In the SR20DE engine the cast bed of radical bearings providing additional rigidity of the block of cylinders and more difficult design of the oil pallet consisting of aluminum and steel cases and a maslootrazhatel are applied.

Fig. 2.8. Marking of dimensional groups of diameters of cylinders on the block of GF14DE and GA16DE engines: 1 — numbers of dimensional groups of diameters of cylinders; 2 — numbers of dimensional groups (categories of the sizes) of inserts of bearings of a bent shaft; 3 — number of dimensional group of diameter of the cylinder No. 1; 4 — number of dimensional group (category of the size) of inserts of the bearing No. 1

Marking of dimensional groups of diameter of cylinders is applied on the block of cylinders (fig. 2.8 and 2.9)

Fig. 2.9. Marking of group of diameter of cylinders on the surface of the block of cylinders of the SR20DE engine