Removing a thermostat

I have a 2001 Sebring with a 2.7. I need to change out the thermostat (engine wont come up in temp) and there is one bolt under the air manifold. Anyone know how to get that one out? I started to take off the manifold but the eight bolts did not completely loosen it. There has to be a trick

Thanks

Jim

you need a 10mm, 1/4dr swivel socket and lots of patience. good luck