Removal and installation the oil pump (Opel Vectra C)

1. On most engines considered in this Manual, the oil pump is driven directly by the crankshaft - the oil pump rotors are mounted on the shaft journal. If necessary, it is recommended to replace the leading and driven rotors together. Operations to check the condition and adjust the oil pump should be entrusted to service station specialists.

Engines Z16XE/Z18XE

2. Remove the timing belt tensioner and timing belt guide roller (see Section 8).

3. Remove the oil pan, unscrew the 3 mounting bolts and remove the oil intake.

4. Remove the toothed wheels and the timing belt drive wheel, unscrew the mounting bolts and remove the rear timing belt drive cover (see illustration).



5. Disconnect the oil pressure sensor wiring connector, unscrew the 7 mounting bolts and remove the oil pump (see illustration). Using a suitable tool, carefully remove the front crankshaft oil seal.





6. Before installing the oil pump, clean all mating surfaces from any remaining sealant and pre-thread all holes.

7. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color) insert it into the seat and press it in using a special tool (see illustration) on the crankshaft journal.



8. The installation of the remaining removed components is carried out in the reverse order of their removal.

Engines Z22YH/Z22SE/Z20NET

9. Disconnect the cable from the negative terminal of the battery, remove the engine cover and air cleaner.



10. Relieve the pressure in the fuel supply system, loosen the fastening nut and disconnect the fuel supply line.

11. Using the KM device796-A disconnect the fuel tank ventilation system hose.

12. Remove the right front wheel and multi-rib belt.

13. Remove 3 bolts and front section of exhaust system.

14. Remove the rear engine mount, loosen the nut and remove the front engine mount axle bolt.

15. Raise the power unit using a lifting device and remove the right engine mount.

16. Raise the engine with a lifting device, unscrew the 3 bolts of the bracket securing the right support to the engine block, remove them and remove the bracket.

17. Loosen the mounting bolt and remove the multi-rib belt tensioner.

18. Remove the 4 upper bolts (see illustration 8.84) timing belt cover fastenings, lower the engine slightly and remove the bolts.

19. Drain the oil from the engine crankcase, unscrew the mounting bolt and remove the crankshaft pulley.

20. Unscrew 7 bolts and remove the timing belt cover.

Note: Bolts are installed with washers.

21. Using a suitable tool, remove the front crankshaft oil seal. Be careful not to damage the seating surface.





22. Remove the 15 mounting bolts and the oil pump cover. Then remove the oil pump rotors (see illustration).



23. Installation is performed in the reverse order of removal. Before installation, clean all mating surfaces. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color) and with the help of KM devices6105 (see illustrations) press the seal into the seat. Tighten all threaded connections to the required torque.

Z32SE Engine

24. Remove the timing belt and oil pan.

25. Remove the camshaft gears, end plate (see illustration 11.40) and the rear timing belt cover (see illustration 11.41).

26. Loosen the generator mounting bolts.

27. Using a special device (see illustration) remove the timing belt drive wheel.

Caution! When removing the wheel, do not allow the crankshaft to turn!

28. Disconnect the electrical wiring from the sensor (see illustration).

engine oil pressure, unscrew the 7 oil pump mounting bolts and, using a suitable tool, separate the pump from the engine block.

29. Remove the front crankshaft oil seal. Be careful not to damage the seating surface.

30. Before installing the oil pump, clean all mating surfaces from any remaining sealant and pre-thread all holes.

31. Apply an even layer of sealant (green color) thickness approximately 0.2 mm onto the surface of the new sealing gasket on the side adjacent to the oil pump (see illustration). The sealant should be applied only to the areas marked with hatching. Lubricate the threads of the fastening bolts with a locking compound (red color), install the pump and tighten the bolts in the order shown.



32. Further installation is carried out in the reverse order of removal. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color) and with the help of devices KM-693-A install the seal into the seat. Tighten all threaded connections to the required torque.

Z19DT(H) Engines

33. Remove the timing belt.

34. Remove the oil pan.



35. Unscrew the bolt (left-hand threaded) securing the timing belt drive wheel, keeping it from turning with special tools (see illustration) and remove the wheel.



36. Remove the front oil seal (see accompanying illustration) oil pump. Be careful not to damage the mounting surface. Unscrew the 7 oil pump mounting bolts and, using a special tool,EN-46788 threaded stud. Remove the oil pump.

37. Before installing the oil pump, clean all mating surfaces from any remaining sealant and pre-thread all holes.



38. Lubricate the threads of the five mounting bolts (M6x20) with a locking compound (blue color), install the pump and tighten the bolts in the order shown.



39. Further installation is carried out in the reverse order of removal. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color) and with the help of devices EN-46793 (see illustration) install the seal into the seat. Tighten all threaded connections to the required torque.

Engines Y20DTH/Y22DTR

40. Replacement/repair of the oil pump on models equipped with these engines is performed only after removing the engine and is therefore not covered in this Manual.