Just bought a 02 LS. The previous owner drove it very little but said there was no thermostat in it. Of course, it took forever to get it up to operating temperature and as such has thrown a code. I drove it a couple hours and it rode great. I have another 5 to 6 hour drive to get back home. Will driving it without a thermostat hurt anything until I get back home to put one in? Also, it is quite strange, but it wants to overheat when idling for a long period of time. Other than that, it runs great.