Can someone tell me where the thermostat is located ! I am thinking righthand side of engine behind a black plastic plug which unscrews as i cannot see anywhere else ? If this is the location how do i get this plug out without damaging it as i need to insert something inside it to turn it and with limited room its going to be a problem. I was told the thermostat was behind a housing and i was required to remove 2 M6 bolts but i cannot see anything of this description