Astra L4-1.8L (2009)
6. Remove the camshaft position actuator solenoid valve bolts.
7. Remove the camshaft position actuator solenoid valves and seals.
8. Check whether the filter is broken or not (1).
9. Remove the four filters (intake and exhaust).
1. Broken Filter: Remove filter with a blunt tool.
2. Unbroken Filter
1. Locate the filter hinge between the holes.
2. Cut the filter hinge slightly.
Caution
Do not scratch the valve surface.