When you notice that the engine is losing power, the membrame of the dump-valve might be leaking. With this description you will be able to repair the dump-valve. (4 cilinder petrol turbo engines). The descriprion is based on the descriprion of forum member iluvsanela of the Dutch Saab forum.

Needed for the repair:
  • Sokets, screwdriver.
  • Torx 25 en 30 for the air filter assembly and the membrame cover, socket 7 for the hose clamps.
  • Membrame.
  • A plier or this handy tool to remove the hose clamps.
First remove the air cleaner assembly. Screws, 5 x Torx 25. Remove the hose clamps from the air tube.
Disconnect the wiring plug from the mass airflow sensor, slide out the locking catch and disconnect it from the sensor. Remove the cover and the air filter.
 
Pull the filter assembly away from the 3 rubber mountings. Remove the assembly gently and push/pull the tube in the bottom of the housing downwards.
Remover the small tubes from the air hose. Use a plier or the special tool. Remove the hose clamps from the air hose.
Now you can see the dump-valve, remove the small hose, it is possible that the hose is attached without a clamp..
(When you attach the hose again, use a cable tie to prevent the hose from disconnecting).

Remove 2 Torx 30 bolts. Remove the third torx with one hand while keeping the cover in place with your other hand. This to prevent parts falling into the engine bay.Remove carefully all parts.

 
After removing the dump-valve, you should have these parts.
When remounting the dump valve keep all parts in the following order of the left drawing.
Clean all parts. Lubricate the membrame with acid-free vaseline and stick it to the membrame housing.

Place the cover with the new membrame in the right following order and keep it in place with one hand while fastening one of the torx screws with the other hand. Be carefull, the membrame is a bith thin and can be damaged easely.
Fasten the first screw as good as possible, fasten the other 2 screws.

Place everything back in reverse order.
 

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