what is the sensor on the head, on the passenger (left) side of an 88-91 crx just below the upper radiator hose connection on the block, there are 2 one is a single point sticking off the block that i have never used on my zc but there is another more toward the front (header) side of the block at screws onto the block, and on the inside looks like a temperature sensor, well i need to know what it is because i broke it when i just put my engine in the car after doing some work on it, not a big deal i can get one from either parts dealer or junk yard but im curious as to what it is because it seemed highly damaged b4 i ever broke it and now i see the wires are crossed.