[dap930]

You can make your own cylinder head temperature sensor for MS. It consists of an GE NTC thermistor (AL03006-1847-76-G1, 3K ohm@ 25*C) and a 5/16 or 3/8" terminal ring. I made this for my installation and it works good. It is installed under the fan shroud at the front corner of cylinder #3 and secured with the shroud bolt, clamping the terminal ring against the cam tower. It is made by carefully and lightly crimping the thermistor glass body to the wire terminal ring. Then apply JB weld to the crimp area to ensure the element is secured to the terminal. Then install heat shrink to the wire leads to insulate them. Bend the leads as needed and solder wire leads. Insulate the solder joints and then heat shrink the wiring to the terminal ring for support.

The sensor must be calibrated in TS. Here are the calibration numbers I used:

33* - 8200 ohms
77* - 3000 ohms
212* - 276 ohms

Buy at least three thermistors so if you bust one trying to crimp it in the terminal ring you have spares. They can be purchased at DigiKey, Mouser, etc.

Prior to starting when cold, the IAT and the CLT read exactly the same for my installation. I cut off WUE by 125* F in TS. CLT generally reads 140 - 160* depending on temperature and driving conditions when warmed up. Hot starts with heat soak can show 190 - 220* depending on how hot it is.