How to change a thermostat on a 2002 dodge stratus 2.7?

I know u hav to follow a hose from the radiator to sum thing and the thermostat goes there, but i can't take that thing off because there is sum strange looking black thing on top of the fourth bolt i have to take off. I cant take that black thing off i've taken all the bolts off on the top of it but it wont come off. I need to know how that thing comes off or if there is another way to change the thermostatHow to change a thermostat on a 2002 dodge stratus 2.7?that t-stat is on the passenger side of the engine block. i think you have to get it from the wheel well if i remember right.How to change a thermostat on a 2002 dodge stratus 2.7?id sell that asap those cars become nothin but trouble