Over heating issues

[Vaughan Tyghter]

I own a 2007 fx35 and I keep running into overheating issues! It’s been to the dealer twice and the thermostat was changed still overheated.
Took back this Friday then checked the system and bleed it drove it all weekend the gauge jumped up a little then went back normal. Drove all day no problems when I got home the gauge shot up on me. I don’t get it smh!!!

 

[Maleficio]

My Autel MD808 scanner can give me live data as the engine operates. I saw my coolant temp at 193 degrees F. I imagine that's a normal temp. You should do the same when your temp needle fluctuates. If your live temp read doesn't match the needle then you likely have a bad temp sending unit.

 

[skagen6675]

I had the same problem. I changed my radiator, thermostat, hoses. Now I can drive it in the desert with no problem. I also used Nissan coolest with distilled water. It was actually pretty easy. Hope this helps. Good luck!