Can anyone here explain how to remove the thermo sensor switch from the top of the head on a 92 wave 111. It has a retaining plate with 2 nuts and a grommet that is inserted into the head. I took off the plate and started pulling the grommet out but then stopped for fear its connected to something inside the head. Do I just yank that sob out or do i have to remove head cover and disconnect something inside. Dont want to destroy anything by just pulling. Also any tricks to getting the new one in. Thanks in advance.