the temp gauge will only go 1/4 of the way up. the temp doesnt fluctuate at all. it will stay the 1/4 and not get any warmer. now i even took the radiator cap off while the cars has been on for about 10min give or take. normally as a cars warms up anti-freeze will overflow out of the radiator as the car tries to build put pressure and nothing at all. could that be caused by the thermostat not opening?