2. Clamp the crankshaft between the lathe centers (or put the bearing journals into prisms) and use a dial indicator to measure the runout on the middle neck. Beats should not exceed 0.06 mm. Otherwise, the shaft must be replaced.
3. Measure the clearances in the main and connecting rod bearings.
4. Clean the bearing shells well and place them in the cylinder block bearing bed or in the connecting rods.
5. Put a piece of material "Plastigage" (plastic "wire") on the neck of each main bearing and on the cap of each main bearing with inserted liners. Tighten the bolts with a tightening torque of 65 Nm. Do not turn the shaft after this.
6. To check the clearances of the connecting rod bearings, you need to attach the connecting rod to the connecting rod journal and put a piece "Plastigage" on top of the crankpin (arrow). Fit the bearing cap with bushing and tighten the nuts to a torque of 30 Nm. Since the shaft can no longer be rotated, measurements are taken on two connecting rod bearings located at BDC.
7. Unscrew the covers on the main bearings, on the connecting rod bearings, unscrew both covers in turn.
8. Using the measuring ruler included in the kit "Plastigage" Measure the crushed strips of material at their widest point. If this value exceeds 0.17 mm for main bearings, the bearing caps must be replaced with new ones, bearing in mind whether the journals have been ground before.
9. To check the clearances of the remaining bearings, you need to check the crankshaft and take measurements on the other two connecting rod bearings. If there is no set "Plastigage", but you can use an inside gauge, you can measure the clearances of the main and connecting rod bearings as described below.
10. Install the bearing caps with inserted shells according to the bearing numbers on the cylinder block and tighten the bolts to a torque of 65 Nm. You should definitely pay attention to the fact that the liners fall into their original places. If the clearances of connecting rod bearings are measured, it is necessary to insert the liners into the connecting rods and into the caps and screw the caps with the same nuts, tightening them with a torque of 30 Nm.
11. Measure the inner diameters of the bearings. The direction of measurement A and B and the measurement points 1 and 2 must be observed (A and B) and the amount of taper (1 and 2). Record your results for each bearing.
12. Measure the diameters of all bearing journals in order with a micrometer. In this case, again, take measurements in certain places, which are indicated by arrows. Record the measurements for all bearing journals.
13. Subtract the measurements for the bearing diameters from the measurements for the inside diameters. The result will be bearing clearance (mainstream or connecting rod) and must correspond to the value specified in the Specifications.
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