thermostat vital for correct running conditions,esp if any kind of ecu injection control system fitted.removing stat will make engine ALLWAYS run cold(no demisters in winter)just because gague is reading btm1/3 dosent mean its faulty.Correct function should be from cold read cold.5mins or a couple of miles read hot untill stat opens and gague drops untill fully warm when reads 3/4 or 80 dgr or so.follow the top rad hose to engine and remove there.stat is usually visible down stub pipe at that point.
caine
August 2008