>>A<< Thermostat Installation
WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Make absolutely sure that no oil adheres to the rubber ring of the thermostat. Also do not fold or scratch the rubber ring during installation.
Install the thermostat so that the jiggle valve is facing straight up. Be careful not to fold or scratch the rubber ring.