Thermostat: Testing and Inspection

NOTE:
- Drain off about two liters of coolant. Remove expansion tank cap.
- Open nipple on left underside of radiator, use hose to collect coolant. Close nipple.





Thermostat Replacement
1. Removal/installation thermostat:
- Remove thermostat housing cover hose and remove thermostat and gasket (Torx 40).
- Clean thermostat housing gasket surfaces.
- Install new thermostat seal.
- Install thermostat in housing, install and tighten cover and hose.
- Fill with coolant and run engine warm until the thermostat opens. Top up if necessary.
- Check for leaks.





Thermostat Check
2. Check opening function:
- Thermostat can be tested in hot water.
- Maximum opening should occur within two minutes in water at opening temperature.
- Marking: 87
Starts to open at: 87°C (189°F)
Fully open at: 102°C (216°F)

- Marking: 90
Starts to open at: 90°C (194°F)
Fully open at: 105°C (221°F)