Well, it looks like during one of the cooler nights here in Atlanta the temperature got just low enough to freeze some of the water in my miata engine and cracked the rear coolant temp sensor housing. I'm keeping my fingers crossed that there's nothing else damaged. So, if you have a spare you can part with let me know. Engine is a '90 1.6L. Here's what it should look like, though I think there may have been different castings.
Thanks!
