From a relative novice: I was replacing the coolant temperature sensor\n(we don't have a Saturn dealer in town, so I picked one up from\nAutozone -\- about , brass construction) in my '98 SL2 this morning.\nI was warned not to overtighten it, so I tried not to crank it down too\nhard. But when I took it out for a test drive, I heard a little\nhissing noise, and I figured maybe I didn't tighten it enough (although\nI didn't see any signs of coolant leaking out from around it). I let\nthe engine cool down again and I went back in with my socket wrench.\nTightened it some more . . . then it got easier to turn. I pushed a\nlittle more to make sure it really had changed and probably turned it\nabout 1/2 of a turn in all. I'm guessing I stripped the threads on my\nbrass sensor. Opinions? I assume I should get another one and put it\nin more gently?\n\nI disconnected the negative terminal on the battery for a minute to\nreset the PCM. Now my rear defogger doesn't turn on. I guess I'll\ncheck the fuse tomorrow. Do you think it's a result of my work with\nthe CTS? Any suggestions besides the fuse?\n\nThanks.