Avalon XL V6-3.0L (1MZ-FE) (1997)
Thermostat: Service and Repair
Removal
NOTE: Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the
engine tends to overheat.
1. Drain engine coolant.
2. Remove air cleaner cap assembly and air filter.
3. Disconnect Engine Coolant Temperature (ECT) switch connector.
4. Disconnect engine wire protector from water inlet and RH cylinder head.
Remove the 2 nuts, and disconnect the engine wire protector from the water inlet and cylinder head.
5. Disconnect water inlet pipe from water inlet and LH cylinder head.
(a)
Remove the bolt, and disconnect the inlet pipe from the water inlet.
(b) Remove the O-ring from the inlet pipe.