90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990)
Water Pump: Service and Repair
NOTE: Replace gaskets and seals. All components shown in illustration can be removed and installed with engine installed. All hose connections are
secured with screw type clamps.
1 - 20 Nm (15 ft lb).
2 - Water pump. Check pump shaft for binding, replace If damaged or leaking.
3 - O-ring. Replace if damaged or leaking using oversize seal (0.5 mm, part number 069 121 043).
4 - Hose flange
5 - Gasket
6 - O-ring
7 - Thermostat Checking: heat in water bath, Starts to open at 87°C (1 89°F) full open at 102°C (216°F), Opening distance: 8.0 mm, minimum (0.3
in.)
8 - Thermoswitch for fan after-run, Switching temperature: approximately 85°C (185°F).
9 - To heater core
10 -
To upper radiator
11 -
To lower radiator
12 - 10 Nm (7 ft lb).
13 - Coolant tube (metal)
14 - Vent valve
15 - From heater core