I own a 1992 honda accord, It has an overheating problem, the fans came on and off, then I noticed coolant leaking from top of radiator, So I removed the radiator, I'm going to install a new one, I removed goose neck (where sensor is) but no thermostat, it has an o ring and the attaches to the block, Is this where the thermostat goes? Where is the thermostat located, Thank you, any help will be appreciated, Best Regards, Carl