Filling Audi 90 B4

1. Install thermostat with NEW "O" ring. Vent valve must be installed facing up (arrow). (Scheme 7)
2. Install union. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-122049-S33388032592001091300000).
3. Install upper radiator hose
4. Fill coolant up to upper edge of expansion tank. (Scheme 8)
5. Close expansion tank cap.
6. Run engine until operating temperature has been reached.
7. Check coolant level and top up to marking as follows (if necessary). When engine is at operating temperature, coolant level must be somewhat above "MAX" mark. When engine is cold, level must lie between "MIN" and "MAX" marks.

Scheme 7

Scheme 8