2. The camshaft drive belt must be replaced in any case, unless it is in excellent condition. Replace sprockets if they are damaged or defective.
3. Inspect the cams and camshaft journals for wear and damage. In case of obvious defects, the camshaft may need to be replaced. Inspect also the bearing shells in the cylinder head and covers.
4. Clean the camshaft oil line with solvent and blow it out with compressed air. All openings in the line must be cleaned (see photo).
5. Inspect the pushers for wear and tear and replace them if necessary. When replacing the camshaft, the tappets must be replaced, and it is also desirable to replace the valve springs.
6. If the starter ring gear is damaged, it must be replaced (produced in a specialized workshop). Minor defects on the surface of the flywheel that contacts the clutch can be removed by resurfacing (also produced by specialist).
7. Inspect manifolds as indicated in chapter 1A, section 29, skipping all mention of connecting hoses.
8. Check the camshaft drive belt tensioner for freedom of rotation of the idler pulley bearing and wear or deformation of the spring. If necessary, replace defective parts - the idler pulley, bearing and end shield are replaced only as an assembly (see photo).
Crankshaft centering sleeve
9. On the latest models with the XU engine, there is no centering sleeve at the end of the crankshaft, and the diameter of the gearbox input shaft is correspondingly increased.
10. When using a new model crankshaft with an old type drive shaft, you need to install the centering sleeve yourself.
11. In reverse situation (new drive shaft and old crankshaft) the centering sleeve must be removed.
Oil pump - disassembly, inspection and assembly
12. Remove the 6 bolts holding the two halves of the oil pump together. Disconnect the halves, being prepared for the spring and safety valve plunger to pop out (see photo.
13. Inspect the rotors and pump housing for wear and damage. There are no data on the maximum permissible wear of pumps of this type, however, obvious wear of the moving parts indicates the need to replace the pump, with the exception of the spring and the plunger of the safety clan, if there are no parts for the pump on sale (see pictures).
14. Lubricate all parts of the pump well before assembly. Tighten the pump parts with bolts, taking care not to press the diaphragm.
15. If you are going to replace the pump, it is advisable to replace the crankshaft sprocket.