Salam everybody ...
I got 8th gen civic prosmatec 2009 (non-oriel) last year. The car is doing good except the most common engine mount issue, khair I dealt with it.
Few days ago I was cruising on the highway & got a mini heart-attack when I looked at the heat guage.
After noticing the heat guage, I immediately stopped the car on the safe road side. Popped up the hood. And everything seems fine. Water was there in the reservoir & wasn't boiling (yes I am using water instead of coolant, my bad). I checked the pressure by pinching the upper radiator hose & it was also normal. Then I touched the lower radiator hose to know if the T-stat valve is working or not, and that pipe was also normally hot signifying that T-stat is opening & closing properly.
Then I also waited for few minutes to check if the auto fans are working, and they were fine too.
Khair to be on safe side, I just got the fans direct my self & decided to continue my journey.