Other information:
Removal and Installation
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.
...
Removal and Installation
1.
Remove the oil level gauge (A).
2.
Remove the intake manifold.
(Refer to Intake and Exhaust System - "Intake Manifold")
3.
Remove the oil level pipe ( ...