Don't run your car without the thermostat, it will run too cool/confuse engine management etc etc. On some cars, they run bypass thermostats, and without the bypass blocked off, engine will immediately overheat, but I don't know if yours does. (Bypass thermostat has a "foot" on the bottom, easily distinguished). Guys who know this exact engine chime in and say whether "bypass" type or not.
I always test a thermostat before I use it, ie boil it to ensure it opens all the way; so do that before you put it back.
As said above, seeing "recent rebuild", likely there is air in it, as they haven't burped it properly.
Make sure all the air is out of it, manual describes how. Otherwise the cooling system just can't work.
I always test a thermostat before I use it, ie boil it to ensure it opens all the way; so do that before you put it back.
As said above, seeing "recent rebuild", likely there is air in it, as they haven't burped it properly.
Make sure all the air is out of it, manual describes how. Otherwise the cooling system just can't work.