Coolant thermostat housing, assembly overview

Fig 1: Coolant Thermostat Housing, Assembly Overview

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - O-ring

• Replace if damaged

2 - Retaining clip

• Check for secure seat

3 - Coolant thermostat housing

4 - Bracket

5 - 10 Nm

6 - Coolant thermostat

• Note installation position
• Checking: Heat up thermostat in water
• Opening begins approx. 80 ° C
• Ends approx. 105 ° C

• Opening lift min. 7 mm

7 - Connection

8 - Oil seal

• Replace

9 - Engine coolant temperature (ECT) sensor G62

• With engine coolant temperature (ECT) sensor G2
• For Engine Control Module (ECM)
• If necessary release pressure in cooling system before removing

10 - Plug

• If necessary release pressure in cooling system before removing