I have a standard temp genuine Renault thermostat that keeps sticking shut, it only does it when the car is warming up, temp goes just past the third line and will keep on rising until i grab hold of the top hose and give it a good moving around. Then it opens and is fine from then on.
Anything i can do to the thermostat to make it a little less sticky?
Or should i just stop being a tight arse and get a new one