Where is the thermostat located on a Nissan Sentra?

Follow the bottom hose to the thermostat housing on the front side of the

engine. There should be two 10mm bolts. remove the bolts, pop the cover off, and
remove the old thermostat. Scrape the old Gasket off, if any. Then reverse the

procedure, putting the new thermostat in. As an added protection, you may want

to lightly dab some red RTV, where it is medal to medal.