I don't know if I'll get any reply, but I've been searching the threads to no avail. What vehicle was this done on? I have an 06 zx4 2.0, and trying to change the CHT/engine temp sensor. Its right on top in the middle of valve cover.. I can't find any tool to fit in there. I have a deep socket, but the clip gets in the way of the socket reaching the hex/flange/middle of the sensor. What tool(s) have you used to replace this?? I could destroy the black clip, but I don't know if I'd get the new one on regardless.