Heater Valve - Repair Methods
83saab02SUBJECT:
900 HEATER VALVE REPAIR METHODS
ISSUE: 07/83-636
FILE IN S.I. MANUAL:
VOLUME: I
SECTION: 8
PAGE: 71
CONTENTS:
A. New method for replacing heater or water valve using new Saab tool.
B. Replacing broken control rod connection stem on heater valve. The connection stem is now available as a separate spare part.
A. Replacing heater valve, Saab 900 as from M80 [Applies to heater valve with sheet metal capillary loop but not earlier thermostatic valve].
1. Remove the lower knee pad. If the car is equipped with Factory speed control do not remove the lower knee pad. The valve can be more easily removed through the speaker grille opening.
2. Remove the left-hand speaker grille.
3. Loosen the two hoses from the valve on the engine compartment side (about 1-1/2 cups of coolant will run out).
4. Remove the heater valve screws with the aid of screwdriver 84-71-054 (hex screwdriver 4 mm with ball-form point, blade length 190 mm).
5. Disconnect the valve from control rod.
6. Replace the heater valve, or, if the control rod connection stem is broken, as an alternative replace the stem as in Part B of this S.I.
7. Place the O-rings on the heater valve and secure them with the aid of a dab of adhesive.
8. Re-fit the valve. At the same time fit the control rod in its correct position on the stem.
9. Reconnect the hoses to the valve in the engine compartment.
10. Fill with coolant, pressure-test and bleed the system. Check for leakage.
11. Reinstall the speaker grille (take care to position defroster duct correctly) and the knee pad section to the instrument panel.
NOTE! If valve was repaired because of corrosion, be sure to replace engine coolant. The engine coolant should be changed every two years as the anti-corrosion additives are gradually used up in the system.
B. Replacement of broken control rod connection stem.
1. Remove the stem from the valve actuator with the aid of a grinding disc or drill out the rivets.
2. Pop-rivet a new stem to the valve. The stem is designed so it can only be fitted one way.
Repair Parts Part No. Quantity
Stem 94-80-401 1
Pop-rivet 94-80-419 2
Special Tool
Hex screwdriver 84-71-054 1
WARRANTY INFORMATION:
Failure Code: 85431-03-0-XX-05
Operation Number: 85431 for 1.3 hours. (To repair with special tool is the same time as prior method of R & R valve only.)