My truck has always been very temp stable running 180hwy 199 max when sitting in traffic.
I decided to take it on an 8 hour trip for the holidays. All was going great running low 180s down the road but pulled off the hwy for gas and had to stop at the end of the off ramp for a light. Temp started going up rapidly and hit 205 setting off the ultra gauge alarm.
I tossed it in neutral and reved it to 1500 rpm and temp went back down to 185 within 15 seconds.
This behavior continued the rest of the trip any time I sat at idle???

 

 

205 is nothing to panic about. Sounds like whatever it may be you are at least alert enough to catch it early.

 

 

Coolant level good ? Mine does the same thing after a long hi-way run, stop on a ramp and my temp hits 199 - 201 as soon as I move or site for a minute or too it drops to normal. Around town that rarely happens, I have not been able to figure it out, but my coolant level is stable so I just keep an eye on things.

 

 

What stat did you end up with? And yeah, a stock stat will get up to 220 but it will come back down. You're becoming a good rover owner always one eye on the temp.

 

It's a rebuilt engine with about 3k miles. New grey tstat. I assume it was a new water pump but who knows. Voltage stays 13.8 to 14v at idle so belt seems ok. It's in the 50s here so I' m sure the fan clutch isn't engaging... Maybe that's all it is?

 

Also parked it on a hill last night with front a foot higher than rear and it was full to the top

 

Bleed it.

front end up.