Removal and installation of the water pump

1. This Section details the water pump removal operation for Z10XE engines only (P) /Z12XE/Z14XEP, for the rest only additional operations and features are given.

Z10XE engines (P) /Z12XE/Z14XEP

Removing

Note: On these models, the water pump is driven by a multi-ribbed belt.

2. Disconnect the wire from the negative terminal of the battery (see chapter 5) and drain the coolant (see Section 3). On Corsa-Eco models, remove the crankcase protection (see chapter 2).

3. Remove the air cleaner (see chapter 4).

4. Loosen the fastening clamp and disconnect the hose of the crankcase ventilation system (PCV) from intake throttle body (see resist. illustration). Turn out 2 nuts and remove an inlet knot together with an air duct.



5. Loosen the water pump drive pulley bolts, then remove the multi-ribbed belt (see chapter 2).

6. Loosen the fastening clamps and first disconnect the throttle assembly preheating hose, and then the heater hose (see resist. illustration). Disconnect the coolant temperature sensor harness connector.




7. Loosen the clamps and separate the upper and lower radiator hoses from the water pump (see resist. illustration).



8. Remove 9 bolts (see resist. illustration) and carefully remove the water pump from the timing case cover.

Note: The water pump is fastened with bolts of various lengths, it is recommended to mark their installation position with a marker.

The water pump housing is installed using two guide bushings, when removing the pump, remember their installation position.

Installation

9. If the water pump is being replaced, reinstall any additional components from the old pump onto the new pump housing (see resist. illustration), Don't forget to install new gaskets.



10. Thoroughly clean the mating timing and pump covers. Install a new seal on the timing case (see resist. illustration) Install the water pump housing onto the guide bushings. Further installation is carried out in the reverse order of removal.

Features of Z14XE/Z16XE/Z18XE engines

Note: On these engine models, the water pump is driven by a toothed belt.

11. Remove the engine cover (see chapter 2), drain the coolant (see Section 3).

12. Remove the toothed belt, tension and guide roller of the toothed belt (see chapter 2).

13. Remove the drive gear from the crankshaft and unscrew the 2 bolts securing the rear cover of the toothed belt.

14. Turn out 3 fixing bolts and take the water pump (see resist. illustration).



15. Before installing, thoroughly clean the mating surfaces of the cylinder block and pump, lightly lubricate the mating surface on the cylinder block and the pump housing O-ring with silicone grease (e.g. OPEL 19 70206 - white).

Note: O-ring must be replaced without fail (see resist. illustration).

16. When installing, pay attention that on the Z14XE / Z16XE engines, the marks on the pump housing and the engine block match, and on the Z18XE engine, the oil pump boss enters the groove of the water (see resist. illustration) and tighten the pump mounting bolts to the required torque.



17. Further installation is carried out in the reverse order of removal.

Features of diesel engines

18. Disconnect the wire from the negative terminal of the battery (see chapter 5), and drain the coolant (see Section 3).

19. On Y17DT engines (L) remove the air cleaner (see chapter 4).

20. On Y17DT engines (L) /Z17DTH Loosen the water pump pulley bolts. The bolts are completely turned out after removing the multirib belt.

21. Remove the multirib belt (see chapter 2).

22. On Y17DT engines (L) remove the crankshaft pulley (see chapter 2).

23. On the Z13DT engine, loosen 4 nuts (see resist. illustration) and remove the water pump from the cylinder block.

Note: The appearance of the multi-ribbed belt differs from that shown in Ref. illustrations.

24. On Y17DT engines (L) /Z17DTH remove 5 bolts (see resist. illustration) and remove the pump from the cylinder block.



25. Installation is made in an order, the return to an order of removal. Clean all mating surfaces. Don't forget to replace the seals.