Cooling system (late models) (Opel Ascona C)

Coolant pump (1.6, 1.8 and 2.0 l, since 1987) - removal and installation

1. Loosen the camshaft timing belt tension as described in Section 3, paragraphs 9 through 18.

2. Remove the timing belt from the coolant pump chain ring, then remove the three pump mounting bolts.

3. Remove the pump from its place (see photo 4.3), and disconnect the O-ring gasket if it remains on the cylinder block.



4. If you intend to replace the pump, you will need to remove the timing belt intermediate cover from the old pump and transfer it to the new pump. To do this, press the cover from the side while rotating it relative to the pump casing. The cover should be disconnected from the casing flange at this time as it is turned (see photo 4.4). Install the cover on the new pump in the same manner.





5. Thoroughly clean the pump installation area on the cylinder block, as well as the pump itself, if you are installing the same one that was there before.

6. Apply a generous amount of silicone grease to the rubbing surfaces of the pump housing and cylinder block, then install a new O-ring gasket onto the pump.

7. Replace the pump and tighten its mounting bolts by hand only at this stage.

8. Install and tension the camshaft timing belt as described in Section 3, paragraphs 21 through 29.

Thermostat housing (1.6, 1.8 and 2.0 l, since 1987) - removal and installation

9. The thermostat removal and installation processes remain the same for later models, however if you wish to remove and then install the thermostat, you will need to remove the camshaft timing belt and its rear cover to gain access.

10. To do this, follow the steps described in Section 3, paragraphs 30 through 36. Then you can unscrew the thermostat housing mounting bolts and remove the thermostat and gasket ring.

11. Using a new sealing ring, install the thermostat, and then perform the operations described in Section 3, paragraphs 40 through 44.

Electric Radiator Cooling Fan - Modifications

1.2 On later models the radiator fan shroud was modified and the method of attaching the radiator was changed.

13. The casing is now secured with two bolts at the top and two tabs at the bottom (see photo 4.13 A and B). Once the top bolts are removed, simply lift the entire assembly up to release the tabs.







14. Apart from this, all other processes are carried out in the same way as described in Chapter 2.