Economizer valve diaphragm — removal and installation (Opel Vectra A)

Note: Before you begin, see. Chapter 2.

Removal

1. Disconnect the negative cable from the battery.

2. On early models, remove the air cleaner. On later models, disconnect the main air duct from the air cleaner, then disconnect the vacuum pipe and breather hose from the air block. Remove the three mounting screws, remove the air block together with the main air duct.

3. Thoroughly clean the outside of the economizer valve housing.

4. Unscrew the two fastening screws, remove the cover of the economizer valve assembly, springs and diaphragm.

Installation

5. Clean the mating surfaces of the cover and housing.

6. Position the correctly oriented spring on the cover and diaphragm assembly, then press the diaphragm assembly and cover together. Note that the vacuum hole in the diaphragm must align with the corresponding holes in the housing flange and cover.

7. Then install in reverse order, but check that the diaphragm is positioned correctly (see illustration).