2. Clean the main journals and bearings with a clean cloth.
3. Lay a length of gauged Plastigage wire across the main journals.
Note: If the engine is still in the vehicle when the main bearing cap bolts are tightened to check the clearance, the weight of the crankshaft and flywheel will flatten the wire more than simply tightening the cap bolts and give an incorrect reading. To obtain a reliable reading, jack the crankshaft under counterweights and check only one bearing at a time.
4. Reinstall the bearings and covers, then tighten the bolts.
- 1st pass: with a force of 25 Nm (2.5 kgf/m)
- Final pass: with a force of 51 Nm (5.2 kgf/m)
Note: Do not rotate the crankshaft while checking.
5. Remove the cover and bearing again and measure the widest part of the flattened wire.
Oil clearance between main bearing and journal:
Necks №№1,5 | Necks No. 2,3,4: | |
Standard | 0,018-0,036 | 0,024-0,042 |
(new) | MM | MM |
redistribution | 0.05 mm |
6. If the wire is flattened too wide or too narrow, (remove the engine from the car if it is still on it), remove the crankshaft and the upper bearing shell. Install a new bearing assembly with the same color code (choose color as below) and recheck the clearance.
7. If the wire clearance is still incorrect, change to the next larger or smaller size bearing (with color coding before or after the one you have chosen) and repeat the clearance check again.
Note: If the required clearance cannot be obtained by substituting the next larger or smaller size bearings, respectively, replace the crankshaft and start over.