If the gauge is designed to work as it does how does water wetter change that?

 

Why would GM design a gauge to read 210, but make it stay there? I understand the point about consumers freaking out over fluctuations, but I wholly believe that they didn't do that. The LS based motors just run at that temp, given the proper water/coolant mix. Add something else to the mixture, and you'll see that the temp gauge does actually move. What I can believe is a "slow gauge" being intentionally designed. What makes me believe that is my truck. The purple ice made the temp gauge move quite a bit.

 

My gauge reads the same as my scanner. With a 160° stat, it hangs around 175° and goes up to 210° in the summer before the fans go to high speed. It went very high once, to alert me that one of the fan's wire plug melted. Why would mine work and not yours?
My Ford van's oil pressure gauge definitely is bogus, never varying between “zero” with the engine off, and “perfect” with the engine on.

 

I run pure water durin the summer with coolant additivie.
It runs 182-188* with the stock thermostat and 34" rad.
Ive tried water wetter, purple ice and everything. Nothing changed except my wallet being lighter.
Now that winter is here i drained bout a gallon out and put some antifreeze in it.

I dont trust the factory gauge. I run a Scan gauge. Works great

 

Mine does this too. The needle also comes off of 160 at about 115. Reads a hair under 210 from about 175-230, shoots up at 230 about how you describe.

 

yes, my cluster reading is way off, compared to my hp tuners reading..

 

Nothing new here Larry. Temp gauge on mine reads the same, and it will not budge from 210 until the actual temp goes over 230.