- a) On 4-cylinder petrol engines, remove the oil pan, timing chain and flywheel/faceplate as described in part A of this Chapter. If desired, you can also remove the crankshaft sprocket.
- b) On 6-cylinder petrol engines, remove the oil pan, oil pump, lower timing chain cover, timing chain and flywheel/drive plate as described in part B of this Chapter. If desired, also remove the crankshaft sprocket.
- c) On diesel engines, remove the sump, oil pump, and oil deflector plate (where provided), chain cover, camshaft timing chain and flywheel/drive plate as described in parts of this Chapter. If desired, also remove the crankshaft sprocket.
2. Remove the rear crankshaft oil seal housing bolts from the cylinder head. Remove the gasket (see fig. 12.2).
Fig. 12.2. Crankshaft rear oil seal housing mounting bolts - 4-cylinder petrol engine
3. Remove the pistons and connecting rods as described in paragraph 11. If you do not plan to work on the pistons or connecting rods, there is no need to remove the cylinder head and push the pistons and connecting rods out. It is enough to simply push the pistons deep into the cylinders to remove them from the connection with the crankshaft journals.
Caution: If the pistons are pushed up with the cylinder head still in place, be careful not to hit the piston into the open valves.
4. Check the crankshaft end play as described in paragraph 15. After this, do the following.
5. On 4-cylinder engines, the crankshaft bearing caps should be numbered 1 through 5 counted from the timing chain side. Similarly, on 5-cylinder engines, the caps should be numbered 1 through 6 and on 6-cylinder engines, 1 through 7 (see fig. 12.5). If there are no marks, make them using a center punch.
Fig. 12.5. Identification mark of the main bearing cap
6. Loosen and remove the main bearing cap bolts and remove each cap (see fig. 12.6). Remove the lower bearing shell and tape it to the appropriate bearing cap. Where installed, note the location and orientation of the oil pickup tube bracket, which is secured with the cap bolts.
Fig. 12.6. Removing the main bearing cap
7. Remove the thrust half rings from each side of the corresponding cover, remembering their location (see fig. 12.7).
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Fig. 12.7. Remove the thrust half rings (shown by arrows) from the bearing cap...
- a) 4-cylinder engines - cover of the middle (No. 3) main bearing.
- b) 5-cylinder engines - main bearing cap No.4.
- c) 6-cylinder engines - main bearing cap No.5.
8. Pull out the crankshaft. Be careful as it is heavy.
9. Remove the upper main bearing shells and place them together with the corresponding caps. Also remove the two thrust half rings from the cylinder block, remembering their orientation (see fig. 12.9).
Fig. 12.9. ...and from the cylinder block