Removal and installation the oil pump (Opel Astra H)

1. On most engines considered in this Manual, the oil pump is driven directly from the crankshaft - the oil pump rotors are mounted on the shaft journal.

2. 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.

Z16XEP Engine

3. Disconnect the cable from the negative battery terminal.

4. Remove the multi-rib belt (see Section 7) and oil pan (see Section 12).

5. Remove the generator by disconnecting the electrical wiring and unscrewing 2 mounting bolts (see accompanying illustration) and move the generator back (see also Chapter 5).



6. Remove the right engine mount (see Section 5) and the bracket for attaching it to the engine block. Remove the toothed belt (see Section 8), remove the tensioner and guide roller of the toothed belt.

7. After unscrewing 2 bolts, disconnect the cooling system pipe (see accompanying illustration).





8. Remove 8 mounting bolts (see accompanying illustration) and remove the pump unit. The mounting bolts are of different lengths - remember the order in which they are installed or mark the bolts.



9. Using a suitable tool, carefully remove the front crankshaft oil seal.

10. Before installing the pump unit, replace the sealing gasket. Tighten the oil pump mounting bolts to the required torque. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color), install the protective sleeve (see accompanying illustration 13.10a) onto the crankshaft journal and along it, insert the seal into the mounting socket. Using the KM-6351 device. (see accompanying illustration 13.10b) press the seal in.







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

Z18XE Engine

12. Remove the oil pan (see Section 12), engine cover (see Section 2) and toothed belt (see Section 8).

13. Remove the tensioner and timing belt guide roller.

14. Remove the gear wheels (see Section 5) and the drive gear of the toothed belt, unscrew the mounting bolts and remove the rear timing belt drive cover (see accompanying illustration).



15. Remove the oil intake tube by unscrewing 3 bolts (see accompanying illustration).





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



17. When installing, make sure that the protrusion on the oil pump housing fits into the groove on the water pump housing, do not forget to replace the sealing gasket. Lubricate the surfaces of the new crankshaft oil seal with silicone grease (white color), install the protective sleeve (see accompanying illustration) onto the crankshaft journal and along it, insert the seal into the mounting socket. Using the KM-6010 device, press the seal in.



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

Engines Z20LE(L/R/H)

19. Remove the oil pan (see Section 12), ignition module (see Chapter 1, Section 22) and toothed belt (see Section 8).

20. Remove the camshaft gears (see Section 5) and the leading gear wheel of the timing drive, tension and guide rollers, bracket for mounting the right engine support (see accompanying illustration). Loosen the mounting bolts and remove the rear timing belt cover.



21. Disconnect the electrical wiring connector from the oil pressure sensor and using the KM-726-A tool (see accompanying illustration) remove the oil filter (see also Chapter 1).



22. Unscrew the bolts securing the oil lines from the oil cooler housing, unscrew the threaded connection for installing the filter using the KM-943 tool, remove the cooler housing from the oil pump (see accompanying illustration).





23. Remove the friction washer (if necessary, heat it with a stream of hot air), unscrew the mounting bolts of the oil pump housing and remove the pump (see accompanying illustration). Remove the sealing gland from the pump body.



24. Install all removed components in the reverse order of their removal. Do not forget to replace the oil pump sealing gasket. After installing the oil pump housing, lubricate the surfaces of the new seal with a generous layer of silicone grease (white color), and insert the oil seal into the oil pump mounting socket using the KM-693-A tool (see illustration 13.23). Before installing the oil cooler housing, replace its sealing gasket (see accompanying illustration).

Z14XEP Engine

25. Remove the timing chain and front crankshaft oil seal (see Section 8).

26. Remove the oil pump cover (see accompanying illustration) and remove the driven and driving rotors of the oil pump.



27. Installation is carried out in the reverse order of removal.

Z17DTL/H Engines

28. Remove the oil pan (see Section 12) and the timing belt (see Section 8).

29. Remove the oil pump gear, holding it from turning with a socket wrench (see accompanying illustration).



30. Using special devices (see accompanying illustration) remove the timing drive pinion.



31. Remove the 9 mounting bolts and remove the oil pump cover.

Note: The bolts are different lengths - remember the order in which they are placed! Then remove the oil pump rotors (see accompanying illustration).

32. Using a suitable tool, carefully remove the crankshaft and oil pump seals so as not to damage the mounting surfaces (see accompanying illustration).



33. Clean all mating surfaces before installation. Apply sealant (black color) on the oil pump cover, replace the pump sealing gasket, insert the rotors, install the cover and tighten the mounting bolts (see accompanying illustration).

Attention: Tightening of the bolts must be completed no later than 10 minutes after applying the sealant!

34. Lubricate the surfaces of the new crankshaft and oil pump seals with silicone grease (white color) and using the KM-656 and KM-657 devices, install them in the mounting sockets - tap the seals until they stop (see accompanying illustrations). When installing the gear, pay attention to the position of the edge of the mounting hole.





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

Z13DT Engine

36. The lubrication system of this engine is fundamentally similar to the lubrication system of the Z14XEP engine (see accompanying illustration).



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