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.
...
The driver's and front passenger's seats are equipped with a headrest for the
occupant's safety and comfort.
The headrest not only provides comfort for the driver and front passenger, but
also helps protect the head and neck in the event of a rear collision.
For maximum effective ...