Overview - Coolant Pump/Coolant Thermostat

Fig 1: Exploded View Of Coolant Pump And Thermostat

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 2.
2. O-rings
   • Always replace after removing
3. Connection
4. Clip
   • Only with the attached version
   • Check for secure fit
5. Bolt
   • 4 Nm
   • Only with the bolted version
6. Retaining Plate
   • Only with the bolted version
7. Engine Coolant Temperature Sensor -G62-
   • Removing and installing. Refer to Engine Coolant Temperature Sensor -G62-, REMOVING AND INSTALLING 
8. O-ring
   • Always replace after removing
9. Coolant Pump
   • Removing and installing. Refer to COOLANT PUMP, REMOVING AND INSTALLING 
   • For a new coolant pump, remove the protective cap
10. Seal
    • Always replace after removing
11. Centering Pin
    • Quantity: 2
12. Toothed Belt
    • For the coolant pump
    • Removing and installing. Refer to COOLANT PUMP TOOTHED BELT, REMOVING AND INSTALLING 
13. Toothed Belt Guard
14. Bolt
    • 9 Nm
15. Bolt
    • 10 Nm + 90°
    • Always replace after removing
    • Left-hand thread
16. Toothed Belt Sprocket
    • Note the installation position
17. Exhaust Side Balance Shaft Seal
    • Replacing. Refer to BALANCE SHAFT GASKET, REPLACING, INTAKE SIDE .
18. Balance Shaft
19. Coolant Thermostat
    • Removing and installing. Refer to COOLANT THERMOSTAT, REMOVING AND INSTALLING 
    • Checking. Refer to COOLANT THERMOSTAT, CHECKING .
20. Centering Pin
21. O-ring
    • Always replace after removing
22. Connection
23. Bolt
    • 9 Nm

Fig 2: Coolant Pump Bolt Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the coolant pump bolts to 9 Nm in a -1 to 5- sequence.