temp gauge for a 99?

I just put 99 block and head in a 92 xj. The only thing that does not fit is the old temp gauge(no hole for it). Anyone know where the 99 temp gauge goes?

thermostat housing

I got that one too but the one that goes into the back of the head? Or can I wire them together?

99 uses CTS on thermostat housing to run data for the gauge through the ECU. not sure but in the 92 there may have been two sensors? might need to run an aftermarket temp gauge or later year display panel.

I was just playing around with it, seems that computer does not care till I unhook the CTS on thermostat housing. if they are both temp sensors than can I wire the to together?

On the front of the thermostat housing is a small flat spot. Drill through that and tap it for 1/4 NPT (tapered plumbing thread). It will open into the area where the computer temperature sensor gets its data. You will need to extend the gauge wire, just run it under the loom where the injector wires are hidden. I have a 99 engine in my 91 and that's what I did. Here's a pic of my quickie fix, eventually I went to the junkyard and pulled a long section of the sender wire from a harness and cleaned it up pretty



Don't tap the NPT too far. It's tapered so if you go all the way down then the gauge sender will also have to go all the way down. Just go far enough for it to fully thread and have a good seal.

ehall's fix is the cheapest and quick. You can also purchase a two sensor housing from Hesco, or a sensor bung for the heater or radiator hose--slice the hose, insert, clamp, install sensor. Again, ehall's is fastest fix.

I give it a try. thanks

That did the trick! For my 92 sensor it was a 1/8 27 NPT the 1/4 was to big.

yeah 1/8 sorry about that