1 - cylinder block; 2 - threaded plug (M14x1.5); 3 - sealing ring; 4 - centering sleeve (∅ 13.5); S - shield; 6, 30 - centering sleeve (∅ 10.5); 7, 8 - nozzle; 9 - bolt (M6x16); 10 - plug; 11 - lid; 12 - centering sleeve (∅ 14.5); 13 - seal; 14 - oil seal cover; 15,16 - bolt (M8x32); 17 - oil seal; 18 - centering sleeve (∅ 10.5); 19 - bolt (M8x22); 20 - oil level regulator; 21 - bolt (M6x12); 22 - O-ring (17x3); 23 - crankshaft sensor; 24 - bolt (M6x16); 25 - stud (M8x35); 26 - stud (M10x40); 27 - bolt (M8x22); 28 - intermediate insert; 29 - threaded plug (M24x1.5); 30 - centering sleeve (∅ 13.5); 31 - knock sensor; 32 - bolt (M8x30); 33 - bolt (M10x92); 34 - threaded plug (M14x1.5); 35, 36 - cover pin
The liners are installed during the block manufacturing process and are not subject to replacement. The inline engine block tilt angle is 30°, to the right. In the lower part of the cylinder block (crankcase), there are seven bearing seats for installing the crankshaft main bearing shells. The main bearing caps undergo final processing together with the cylinder block, so they are not interchangeable. In case of wear or minor damage, the cylinder mirror can be restored by grinding and honing in a service station, followed by installation of intermediate or repair size pistons.
The parameters of the M54 engine cylinder block are given in Table 3.2. The cylinder diameter is measured with a bore gauge in three zones in mutually perpendicular directions, at a distance of 10 mm from the upper and lower edges and at the center of the cylinder mirror.
Table 3.2. Parameters of the cylinder block of the M54 series engine
| Model index | M54B22 | M54B25/B30 |
| Piston-cylinder clearance, mm | ||
| nominal | 0,03 | |
maximum permissible | 0,15 | |
| Cylinder diameter, mm | ||
nominal | 80,00 | 84,00 |
| intermediate | 80,08 | 84,08 |
| 1st repair size | 80,25 | 84,25 |
| Permissible ovality of cylinder mirrors, mm | 0,005 | |
| Permissible conicity of cylinder mirrors, mm | 0,010 | |
| Execution tolerance, mm | from 0.00 to +0.010 | |