Crankshaft
The steel crankshaft is supported by three bearings.
| Axial play | 0.09 - 0.30 mm |
| Diameters of main journals: | |
| - nominal size | 56.990 – 57.000 mm |
| - nominal size (with yellow label) | 56.980 - 56.990 mm |
| - repair size -0.254 | 56.726 - 56.746 mm |
| - repair size -0.508 | 56.472 - 56.492 mm |
| - repair size -0.762 | 56.218 - 56.238 mm |
| Clearance in main bearings* | 0.009 - 0.046 mm |
| Thickness of thrust half rings: | |
| - nominal size | 2.800 – 2.850 mm |
| - repair size | 2.990 – 3.040 mm |
| Axial play of the crankshaft | 0.079 - 0.279 mm |
| Connecting rod diameters: | |
| - nominal size | 42.990 – 43.010 mm |
| - repair size -0.254 | 42.740 - 42.760 mm |
| - repair size -0.508 | 42.490 - 42.510 mm |
| - repair size -0.762 | 42.240 - 42.260 mm |
* Measure using Plastigage measuring rods.
Connecting rods
The connecting rods are forged from steel and have an I-profile in cross section.
| Connecting rod head bore diameter | 20.589 - 20.609 mm |
| Connecting rod bore diameter | 46.685 - 46.705 mm |
| Internal diameters of connecting rod bearing holes, mm: | |
| - nominal size | 43,016 – 43,050 |
| - repair size -0.254 | 42,766 – 42,800 |
| - repair size -0.508 | 42,516 – 42,550 |
| - repair size -0.762 | 42,266 – 42,300 |
| - repair size -1.016 | 42,016 – 42,050 |
Clearance in connecting rod bearings* | 0.006 - 0.060 mm |
| Permissible non-perpendicularity of the axis of the holes relative to the axis of the connecting rod: | |
| - head hole | 0.10 mm |
| - base hole | 0.15 mm |
* Measure using Plastigage measuring rods.
Pistons
Installation Method: The arrow on the bottom of the piston must point towards the front of the engine (towards the drive of the gas distribution system).
| Piston diameter, mm: | |
| – nominal size 1 | 73,910 – 73,920 |
| – nominal size 2 | 73,920 – 73,930 |
| – nominal size 3 | 73,930 – 73,940 |
| – nominal size 4 | 73,940 – 73,950 |
| – enlarged by 0.5 mm | 74,460 – 74,485 |
| – enlarged by 1.0 mm | 74,960 – 74,985 |
| Piston clearance in cylinder | 0.015 - 0.050 mm |
Piston rings
Each piston has three rings: two sealing and one oil scraper.
| O-ring lock gap (installed in the cylinder) | 0.25 - 0.45 mm |
| Clearance of the lock of an oil scraper ring | 0.20 - 0.40 mm |
Piston pins
| Length | 63.0 - 63.8 mm |
| Diameter, mm: | |
| - marking in white | 20,622 – 20,625 |
| - marking in red | 20,625 – 20,628 |
| - marked in blue | 20,628 – 20,631 |
| - marked in yellow | 20,631 – 20,634 |
| Clearance in piston hubs | 0.013 - 0.045 mm |
Visitor comments