Crankshaft
The crankshaft is steel, forged, five-bearing, with four counterweights. The upper main bearing shells have oil grooves. Axial fixation of the crankshaft is carried out with inserts with thrust collars of the bearing of the 3rd main journal.
Diameter of main and connecting rod journals
Axial clearance of the crankshaft, mm:
- nominal: 0.07-0.18;
- maximum allowable - 0.20.
Gap between liners and main journals of the crankshaft, mm:
- nominal: 0.03-0.08;
- maximum allowable (when worn): 0,17.
Flywheel
The flywheel is attached with six bolts to the crankshaft flange. The maximum allowable runout of the flywheel, not whiter, mm: 0.08.
Pistons
Pistons are made of aluminum alloy with steel inserts. A combustion chamber is made in the bottom of the piston. Each piston has two compression rings and one oil scraper ring. To install the piston in the cylinder, there is an arrow on the bottom of the piston, which must be directed towards the camshaft drive. The piston diameter is indicated on the piston head and is measured at a distance of 15 mm from the lower edge of the piston skirt at an angle of 90°relative to the axis of the piston pin.
Piston brands:
- Mahle;
- KS.
Piston pins
The piston pin is floating. From axial displacement, it is held by two retaining rings.
Piston pin length, mm: 58.
Piston rings
Three rings are installed on each piston: two compression and one oil scraper.
Gap in the lock, mm:
- compression rings: 0.3-0.45;
- oil scraper ring: 0.25-0.40.
Maximum allowable wear gap, mm: 1.0.
Gap between compression ring and piston groove, mm:
- nominal: 0.02-0.05;
- maximum allowable wear: 0.15.
Connecting rods
Connecting rods are steel, forged, with an I-section rod, with thin-walled liners. A bushing is pressed into the upper head of the connecting rod.
Clearance between liners and connecting rod journals of the crankshaft, mm:
- nominal: 0.02-0.076;
- maximum allowable wear: 0.095.
Axial clearance of the connecting rod on the neck of the crankshaft, mm:
- nominal: 0.05-0.31;
- maximum allowable wear: 0.40.
The diameter of the hole in the bushing of the upper head of the connecting rod, mm: 22.017-22.023.
Clearance between the piston pin and the bushing of the upper head, mm: 0.003-0.007.
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