No good in the winter heaters wont work properly and the engine will not get to the correct temperature will affect emissions engine managment system buy a new thermostat dont forget flush out the water from the engine put in some anti freeze to protect engine in the winter.
tom
November 2009
yeah but you will have no heating
kenny
October 2009
depends on what vehicle -if it is a by-pass type of t/stat [with seal on bottom as well as one at the top] then you will only get water circulating round small area of engine-so with this type they cant be taken out and still use vehicle!
k
October 2009
Of course - the engine will just run cooler. Top it up first though!
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.