93 YJ I changed the engine and the newer 1 doesn't have the threaded hole in the top of the head near the fire wall where this sensor was on the old. sensor looks like a small water temp sensor. is it one? it appears to be right above the rearmost exhaust manifold pipe. does someone KNOW what it is? I was TOLD it is another water tremp sensor and put it into the block plug but I want to be sure before doing that.
1 red wire only going to it.
Thanks in advance for any help