Replaced Thermostat

[_GMAN_]

So my 2007 suburban was running hot for a few days. I noticed that the temperature was not steady at the 210 mark, but at the 235 mark. The notch to the right of the 210 mark. So I went and bought myself a new thermostat, and replaced the thermostat. The old thermostat has that little nipple that is on the thermostat. The one that I removed that little nipple was not seated and just shaking in its place. Is this a telltale sign that the thermostat was broke?

 

[Fless]

That's a jiggle pin and should, well, jiggle. When installing the thermostat it should be oriented at or near the top. (12 o'clock position)

 

[_GMAN_]

The one I replaced it with didn't giggle. It was fixed. After replacing and refilling with two gallons of Dexcool, all is well now.

 

[mikez71]

It's supposed to jiggle, but it's only there to help with bleeding air pockets.
Nothing important. (Your air pockets will bleed when you get upto temp)