I have not inspected yet but suspect the thermostat is not functioning. If I understand from reading various threads however, and although there are conflicting opinions, there should be no problem if the thermostat fails because the cooling flaps are supposed to end up in a default position as if the engine is already warmed up. Meaning the left flap is up and the right flap is down to pull air through the oil cooler. I have confirmed (by touch reaching through spark plug access hole) that the left flap is up (vertical). I am assuming (I understand the caveat) that the right flap is down in the proper position. How can I confirm that the flap is down short of removing the tin? I tried a mirror into the #4 plug hole (after pulling out a Bosch plug that the PO left there,

Sorry for being long-winded. Any help will be appreciated.
Keith