Suzuki XL7 2007 Service Manual page 792

1F-49 Engine Cooling System:
3. Remove and discard the heater inlet/outlet pipe
gasket and O-ring.
4. Remove the coolant pipe bolt.
5. Remove the coolant pipe.
6. Remove and discard the coolant pipe O-ring.
7. Remove the thermostat housing bolts.
8. Remove the thermostat housing.