Air filter — removal and installation (Opel Vectra A)

Note: If a "round type" air filter is installed, follow the procedure described in Section 4A.

Removal

1. Unclip the coolant expansion tank hose from the air cleaner cover and move it to the side.

2. Loosen the clamp screw and disconnect the main air duct from the air flow meter (see illustration).



3. Disconnect the negative cable from the battery, then disconnect the wiring from the air flow meter.

4. Unfasten the two retaining clips on the left side of the air filter cover, unscrew the two fastening screws on the right side, then remove the cover.

5. Lift the filter element.

6. Loosen the heated hoses and fastening nuts.

7. Remove the nuts securing the two rubber block struts that are attached to the lower half of the air cleaner housing.

8. Some models are equipped with a resonant air intake box to reduce noise. This box is located under the wheel arch and connects to a pipe on the air intake pipe.

9. The resonance box must be removed before removing the air intake pipe. To do this, first apply the handbrake, then jack up the front of the car and install it on axle supports, placed under the sides of the body frame.



10. Unscrew the mounting screws, remove the lower mudguard from under the wing to access the resonance box.

11. Unscrew the mounting screw, disconnect the resonance box from the connecting pipe (see illustrations).





12. If necessary, the air intake pipe can be removed by first removing the connecting pipes from under the wing (see illustration).



13. Manipulate the air intake pipe to release the mounting pins from the front body panel. This is a very difficult operation and requires patience. For better access, you can remove the headlight as described in Section 12.

Installation

14. Installation of all components is carried out in the reverse order. Remember that the air filter element is installed so that the rubber on the flange faces upward.