Next, disconnect the engine from the gearbox. When removing the gearbox, be careful not to bend the input shaft.
Remove the clutch assemblies and components (chapter).
Hold the flywheel ring gear with a screwdriver and loosen the bolts. This is usually enough to loosen the bolts. Once the engine is securely fastened, loosen the bolts.
Remove the cylinder head together with the intake and exhaust manifolds (see chapter). This also involves removing the timing drive and timing belt, described in the chapter.
On the inner surface of the toothed belt, mark the direction of its movement with paint. Remove the oil pan (chapter 3.9). Remove the oil pump (chapter 3.9).
If only the crankshaft is to be removed, the pistons and connecting rods may remain in the cylinder block. Otherwise, dismantle the connecting rod and piston group as described in chapter 3.5. If the pistons with connecting rods remain in the cylinders, you should mark the connecting rod caps, remove them and leave them with the liners. Do not forget to replace the connecting rod bolts.
Attach an indicator to the front of the cylinder block so that the indicator rod can be placed against the nose of the crankshaft. Use a screwdriver to move the crankshaft to one side and set the indicator arrow to zero, then move the crankshaft to the other side. The indicator reading is the value of the crankshaft axial clearance. Record the measurement result. If the clearance exceeds 0.20 mm, this should be taken into account during assembly. In any case, it is recommended to replace the thrust half rings with new ones, either of the same size if the clearance is normal, or with thicker liners to bring the clearance back to normal. If you do not have an indicator, the axial clearance can be measured with a feeler gauge inserted between the front part of the connecting rod bearing cap, the outer surface of the middle bearing and the crankshaft crank cheek (figure 81).
Unscrew bolts 7 (see figure 39) fastening the front cover 20 with the oil seal and remove the cover together with the gasket.
Remove the rear cover with the seal in the same way (figure 82).
Loosen the main bearing cap mounting bolts, loosening them evenly "crosswise", and then remove them one by one. Check if the cap numbers are clearly visible. Cap No.1 should be on the timing drive side.
Remove the main bearing shells from the crankshaft journals and place them on the corresponding caps. Remove both thrust half rings from the central bearing, which serve to adjust the axial clearance. Carefully remove the crankshaft from the cylinder block.
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Remove the remaining liners from the housing and place them in the order of removal. The liners are provided with grooves for oil supply and should be placed in their original places during installation (figure 83). Remove the lower thrust half ring from the middle support of the crankshaft.
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