Coolant Thermostat Housing, Disassembling And Assembling: Notes
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For information on coolant hose routing and connections to the thermostat housing COOLING SYSTEM, ENGINE SIDE COMPONENTS, REMOVING AND INSTALLING
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NOTE:
The following list refers to items in Fig 1
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- - Thermostat housing
- - 10 Nm (7 ft lb)
- - Coolant thermostat
- Checking: heat-up thermostat in water
- Starts to open at approx. 80 °C (176 °F)
- Ends approx. 105 °C (221 °F)
- Opening stroke: min. 7 mm (0.28 in.)
- Note proper installation position
- - Connection
- - 10 Nm (7 ft lb)
- - O-ring
- Always replace
- - Connection
- - Plug
- Plug for vehicles without air conditioning
- Vehicles with air conditioning: A/C Cut-Out Thermal Switch (F163) and Third Speed Coolant Fan Control (FC) Thermal Switch (F165), Brown, 4-pin:
See HEATING & AIR CONDITIONING (UP TO EARLY PRODUCTION 1999) .
- - After-Run Coolant Fan Control (FC) Thermal Switch -F87 - with Engine Coolant Temperature (ECT) Sensor - G2-
- Yellow, 4 -pin
- Checking, see AFTER-RUN COOLANT PUMP AND COOLANT FAN AFTER-RUN FUNCTION, CHECKING
- Switching temperatures:
ON: 101-107 °C (214-225 °F)
OFF: 94-100 °C (201-212 °F)
- - Engine Coolant Temperature (ECT) Sensor -G62-
- Blue, 2 -pin
- For Motronic Multi-port Fuel Injection (MFI) and Ignition
- - Retaining clip
- Check to make sure clip is seated securely